#378

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Andreas Spiess

5 місяців тому

Radar is a valuable technology. Because of its unique features, it not only helped to win world war II. It also can solve many problems in our projects.
Sensors included: RCWL-0516 (3GHz), HB100 (10GHz), CDM324 (24GHz), FM24-NP100 FMCW Radar (24GHz)
I am a proud Patreon of @GreatScott! , @ElectroBOOM , @Electronoobs , @EEVblog , and others. No Docker, No Microsoft Teams, Zoom

These are the questions answered in this video:
- Which Radar sensors exist, and how do they have to be connected to our boards?
- How do they compare?
- How can we use them in our projects?
- Which other technologies exist to solve similar problems?
- And finally, we should have a comparison chart, also including PIR and Lidars

Links:
RCWL-0516 (Presence): s.click.aliexpress.com/e/_9y4W4C or amzn.to/3d82zvG or bit.ly/31mvXsD
HB100 (Speed): s.click.aliexpress.com/e/_ADfbUc or amzn.to/3d6Stem
CDM324 (Speed): s.click.aliexpress.com/e/_AZNnGU or amzn.to/3vZuGWx
FM24-NP100 24GHz (Distance): s.click.aliexpress.com/e/_AmT5cG
Diagram RCWL-0516: www.snapeda.com/parts/rcwl-91...
Info FM24-NP100: ebay.to/3swsfs4
Info speed sensors: bit.ly/3fhxFnd
Info HB100 presence detector: bit.ly/31qcGXg
ESP32 FFT sketch: github.com/G6EJD/ESP32-8266-A...

The links above usually are affiliate links that support the channel (no additional cost for you).
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
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КОМЕНТАРІ
DiWa _
DiWa _ Місяць тому
Any guess what module Garmin might use for their Varia RTL516? The range is quite impressive. I tried to build a similar car approximation detector with a LIDAR Light v3, however this seems to be limited to 40m only.
Andreas Spiess
Andreas Spiess 25 днів тому
I also wonder how they get the 150m. Maybe I should buy one…
Gadget Addict
Gadget Addict 2 місяці тому
Very interesting. I was hoping you'd eventually have more luck in measuring the speed of cars. It almost seems like it might be better to just buy a $99 bushnell and interface with it using an arduino
Gadget Addict
Gadget Addict 2 місяці тому
@Andreas Spiess there's another guy on UKposts who worked out how to interface with the Bushnell Velocity speed gun using an Arduino. I'm probably going to try do the same thing, but with an ESP32
Andreas Spiess
Andreas Spiess 2 місяці тому
True. I once had a laser range finder but did not find a way to interface it to an Arduino
Insane Mainstream
Insane Mainstream 4 місяці тому
Crocs with socks most comfortable shoes hands down.
Andreas Spiess
Andreas Spiess 4 місяці тому
:-)
Ueli Giger
Ueli Giger 4 місяці тому
Hello Andreas, thanks for the great video as usual. It is very informative and gives a good overview over radar sensors. By the way it is also possible to use an FSK modulation to measure the distance to moving objects. This makes it easier to filter out the environment in comparison to an FMCW distance measurement. Further the accuracy is better in comparison to FMCW because with FMCW the distance resolution is limited by the allowed usable bandwidth what is 200MHz at 24GHz. This gives a distance resolution of only 75cm for FMCW in the 24GHz band. With FSK it is possible to reach a much better resolution down to app. 5cm or even more. The K-LD7 from the company RFbeam located in Switzerland uses this modulation to measure the distance of moving objects. It is fully digital and has already a powerful FFT signal processing included.
Ueli Giger
Ueli Giger 4 місяці тому
@Andreas Spiess Hello Andreas. Yes with FSK you can only detect moving objects and no static ones. With FSK it is only possible to separate objects over their speed and direction and not over distance in comparison to FMCW. This means that if you move the sensor itself all static objects will become moving objects with the same speed and you can separate them only over the direction -> For example if you are moving forward and pointing behind you all static objects will become moving objects with a negative speed and if a car or something is driving towards you it will have a positive speed. Because you can separate the objects over the direction it is possible to filter out the so called clutter to only detect the car (simple blind spot detection). With maximum sensitivity it is even possible to detect cars up to 50m as long as you work with the RAW target list and not the tracked one. RFbeam has also a simple Doppler movement detector and speed measurement sensor in its portfolio what is cheaper and has a better sensitivity (K-LD2).
Andreas Spiess
Andreas Spiess 4 місяці тому
Thank you for the info. I did not know about FSK in this application. Reading the documents, it seems, FSK only measures distance for moving targets. Is this true? The module is interesting. I will try to get one for some tests. If it really detects cars at 30m, it would be very good.
Anto ba
Anto ba 4 місяці тому
Se puede dirigir (sensor 0516 ) a una zona en concreto de unos 60º.
Mike
Mike 4 місяці тому
Is it possible to calculate distance in millimetres with some radar module?
Mike
Mike 4 місяці тому
@Andreas Spiess would be very interesting to see some radio modules with triangulation capabilities
Andreas Spiess
Andreas Spiess 4 місяці тому
You mean measure mm distance? These modules do not do that.
Gacheru Mburu
Gacheru Mburu 5 місяців тому
👍👍😁😂
Andreas Spiess
Andreas Spiess 5 місяців тому
:-)
Tom S
Tom S 5 місяців тому
The SMR-3x3 (333/313, etc) series sensors from InnoSent not only measure speed, but also distance, direction and have various angles of detection and are half inch size and are under $20
Andreas Spiess
Andreas Spiess 5 місяців тому
Interesting module. I did not find the range. Do you know?
SHIRLEY ACHARA
SHIRLEY ACHARA 5 місяців тому
I didn’t read the previous comments about your shoes but I am assuming your fans highlighted how fit for purpose they are, thanks for a very informative video.🙂
Andreas Spiess
Andreas Spiess 5 місяців тому
You are welcome! There were different opinions about my shoes ;-)
Nina Correia
Nina Correia 5 місяців тому
Hi Andreas. Hope you are doing well. I read that you asked people not to email you and so I'll ask you here. My dad is turning 70 this friday, the 16th and you are his favorite youtuber. He is a doctor (nephrologist), but recently (about seven years ago) he discovered a big interest in electronics and programming. It really makes my heart melt to see him excited when receives the notification that you have uploaded a new video, when he explains something that he learnt from you or he says your catch phrase "the guy with the Swiss accent". He also buys the gadgets you suggest through your links. Well, I am meaning to ask you if you could wish him an happy birthday. Not even through a video or anything complicated. A simple message would surprise him a lot. With covid, we have just been reaching out to the rest of the family and his friends to gather some messages and I'm sure it would mean the world to him, to see something from you in addition. Thank you so very much for your time and attention and hopefully you'll see this in time. :) Carolina
Nina Correia
Nina Correia 5 місяців тому
@Andreas Spiess I really appreciate it! I contacted you on facebook messenger :) !
Andreas Spiess
Andreas Spiess 5 місяців тому
Contact me on Twitter or Facebook messenger. We will see what we can do... you find the Links in the description.
99guspuppet
99guspuppet 5 місяців тому
This is really useful…… Brilliant as usual
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you!
Liutprando Feinstaub
Liutprando Feinstaub 5 місяців тому
I have a question ...could this doppler sensor, be used to detect infrared emitters pointed out towards it ? Thanks, i hope to have asked correctly
Andreas Spiess
Andreas Spiess 5 місяців тому
Infrared is light and these radars use a completely different frequency. So they do not "see" each-other
Dog Walker
Dog Walker 5 місяців тому
Have you ever made a ground penetrating Radar?
Dog Walker
Dog Walker 5 місяців тому
@Andreas Spiess Thanks for answering, That's a shame I want to try for some amateur archeology, resistance testing struggles with the amount of coal in the soil.
Andreas Spiess
Andreas Spiess 5 місяців тому
No, not yet.
Andy Pü
Andy Pü 5 місяців тому
Oh, evil youtube algorithm. I had the fear you stopped producing videos, however, you did not, it just stopped showing me your videos after video #344. I watched like 3-4 after that by watching the list of 'subscribed content' but it seems to have filtered you out for some reason.... Looks like the weekend time is now reserved with getting up-to-date in your video list. =)
Andreas Spiess
Andreas Spiess 5 місяців тому
So you have something to do... I am now at close to #380...
Andi McBurnie
Andi McBurnie 5 місяців тому
Hi Andreas, another great video, thanks for sharing. I am trying to contact you and have sent you a message on facebook messenger as I am looking for someone with your skills to help with some product prototyping on a paid basis. I'm sure you field loads of this sort of thing, but this is a genuine request.
Andreas Spiess
Andreas Spiess 5 місяців тому
You should have my answer by now...
MicroMachine
MicroMachine 5 місяців тому
Muy bueno!! Muchas gracias!(from Spain)
Andreas Spiess
Andreas Spiess 5 місяців тому
You are welcome!
Angel Bueno
Angel Bueno 5 місяців тому
Gracias por los subtítulos en español. Your videos are really very high tech. I like it.
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you! And I will tell Luciana, the Argentinean translator that you like her subtitles.
Roberto Coli
Roberto Coli 5 місяців тому
Hi Andreas, what happened to the "Episode #number" in title ? Episode #370 was the last to have the number in the title.
Andreas Spiess
Andreas Spiess 5 місяців тому
The last 10 episodes never have numbers...
Mark Hancock
Mark Hancock 5 місяців тому
FMCW is not new. In the late 70's it was called chirp-FM radar (because the short FM sweep sounds like the chirp a bird makes). I know, it was part of my Master's thesis. The problem back then was the you needed to do the Fourier Transform to get the range to the target. The computers that could do back then were to big and heavy to fit on aircraft. My thesis was on an alternative technique that used hardware (multipliers and a CCD transversal filter) to do the Fourier Transform. I recall that one of the problem I had was the the frequency difference introduced by return response delay (caused by the range to target) was very similar in frequency to the doppler shift. This became an major problem when the transceiver was on something that was moving (like an airplane). The ground was usually much closer than the target so the return response from the ground would be doppler shifted and much stronger than the response from the target. I suspect that narrowing the beam using something like a phased array and/or fancy processing (like comparing the response time) could help discriminate between the two now.
Andreas Spiess
Andreas Spiess 5 місяців тому
You are right. Most of the basic technologies are old. What is mindboggling is how cheap we can build them today. We did the FFT with an ESP32 and it was faster than needed ( we only wanted to detect 25km/h, not airplanes ;-) I would assume that the doppler effect is constant over a few chirps and therefore probably can be eliminated. But I am not an expert like you. My thesis was to increase the listening speed for news without increasing the frequency. Also a feature which is built-in in today's smartphones...
Spiros Foufoutos
Spiros Foufoutos 5 місяців тому
I'm sorry but even calling these atrocious rubber slippers shoes is ...not OK. 😁
Andreas Spiess
Andreas Spiess 5 місяців тому
:-)
Ownedyou
Ownedyou 5 місяців тому
10:29 Andreas Stealth! :D
Andreas Spiess
Andreas Spiess 5 місяців тому
:-))
Danny Bokma
Danny Bokma 5 місяців тому
I have been using the A111 from acconeer for some projects ( measure foiling height of a racing solar boat ). Fun to use and if you pick the right development board also very affordable. One could even use plastic lenses to change the opening angle vs distance .
Andreas Spiess
Andreas Spiess 5 місяців тому
Interesting. The datasheet says: Range 2m. What is your experience?
El Nada
El Nada 5 місяців тому
Hello Mr Andreas Spiess, i am looking now for some time for an alternative for the common rainsensors that work by water conducting on a plated board. But there is problems with corrosion and these sensors are not very precise when it goes to tell when it _stopped_ to rain because water stays on them for some time. Would these Radar Sensors be an alternative to that? I have looked up a lot and could only find very expensive equipment for professional meteorologists. Maybe you have an idea.
Andreas Spiess
Andreas Spiess 5 місяців тому
My rain sensor works mechanically. And I know that some Makers experimented with radar. ( github.com/chunter1/precipitationSensorESP32 )
Kenneth Madsen
Kenneth Madsen 5 місяців тому
Shoes? That’s a bit of a stretch 😂
Andreas Spiess
Andreas Spiess 5 місяців тому
:-))
MSHB
MSHB 5 місяців тому
Can u compared the best lidar and give some info about it?
Andreas Spiess
Andreas Spiess 5 місяців тому
I have no such plans for the moment :-(
Johannes Richter
Johannes Richter 5 місяців тому
i like the spanish captions
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you. Luciana from Argentina does them
Harvie
Harvie 5 місяців тому
9:40 you have license plate on your bike???
Andreas Spiess
Andreas Spiess 5 місяців тому
Yes, if they have a motor and are allowed to go up to 45km/h. Then they do no more count as standard bicycles.
phillippc
phillippc 5 місяців тому
Thank you for your effort and work on this topic! I’m looking for a sensor that I can use to track golf shots! So it has to accurately find a small object , preferably also detect the golf club and it’s Speed, and Launch angle of the Golf Ball. As well as speed.
Andreas Spiess
Andreas Spiess 5 місяців тому
You have to go to the golf pages. There they sell golf trainers which measure all the club movements. I am not sure if you also can get a device to track the ball.
phillippc
phillippc 5 місяців тому
Sorry I clicked post too quick! Any information you have would be greatly appreciated !
Procyte
Procyte 5 місяців тому
Are you going to do a video on the Teensy 4.1??
Andreas Spiess
Andreas Spiess 5 місяців тому
I do not have such plans. It is too specialized.
Niklas Paulsson
Niklas Paulsson 5 місяців тому
I miss the mailbag episodes.
Andreas Spiess
Andreas Spiess 5 місяців тому
Maybe it is time for one...
Namer Num
Namer Num 5 місяців тому
So how i can shot down a plane?
Namer Num
Namer Num 5 місяців тому
@Andreas Spiess how about video how to get derection
Andreas Spiess
Andreas Spiess 5 місяців тому
I do not think that this is a good idea ;-)
nadieselgirl
nadieselgirl 5 місяців тому
Would you consider letting us put up the funding for some longer distance sensors? I'd like to come up with one, ideally with speed detection that could cover 300-500 yards. I could also write software to make note of objects in the environment and then when something appears or disappears it could trigger an alarm. This would be in an outdoor desert environment and likely rotating.
Andreas Spiess
Andreas Spiess 5 місяців тому
After making this video I researched a little into collision avoidance radars for cars. They claim a reach of up to 150m and cost less than 50 dollars. Which seems to be a good deal. Now we have to find if somebody reverse-engineered the CAN protocol.
Dan Black
Dan Black 5 місяців тому
What you described is how fully blown radar operates as for those distances you need decent transmiter say magnetron from microwave owen, build a crude antena and mount everything with a sensor on a pedestal that can rotate, range will be limited not so much by your sensor but more by your transmitter and antenna.
Robinson Daniel dos Santos
Robinson Daniel dos Santos 5 місяців тому
Best Professor!
Andreas Spiess
Andreas Spiess 5 місяців тому
Wow, thanks!
Joe Ballony
Joe Ballony 5 місяців тому
How relevant is ultrasonic sensors in this comparison of (moving) presence detection, together with PIRs? They seem to work fine as parking sensors. They are not impacted by light, (outside) heat, level of conductivity, they have low power consumption, can be waterproof, and are quite cheap (car sensor + Arduino module under $5). May not be pet friendly, but if they keep bats and viruses away it's perfect!
Andreas Spiess
Andreas Spiess 5 місяців тому
Ultrasonic sensors are also a possibility and should work very well for presence detection, you are right. I do not know why they are often not mentioned in this application.
MahnoTv
MahnoTv 5 місяців тому
Hello Andreas! Thanks for the great video! I am also interested in radar technology and would like to clarify that there are radar sensors that can measure the vital signs of people, such as pulse and respiration.
Andreas Spiess
Andreas Spiess 5 місяців тому
You are right, there are many applications of this useful technology.
Brian Fox
Brian Fox 5 місяців тому
As always, the best channel I subscribe to and I’ll drink to that!
Andreas Spiess
Andreas Spiess 5 місяців тому
So far I have no such plans. You can buy such beacons for no money.
Brian Fox
Brian Fox 5 місяців тому
@Andreas Spiess do you have any plans to use BLE beacons to send data to MCU’s? I am attempting such a project with the Ruuvi tag
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you and Cheers!
Corona Virus
Corona Virus 5 місяців тому
The radars of WWII had a reach of 150km .... ? How can we step up the game?
Corona Virus
Corona Virus 5 місяців тому
@Andreas Spiess Indirectly you answered the question of how far does police radar reach ..
Andreas Spiess
Andreas Spiess 5 місяців тому
Good question. Maybe with collision avoidance radars. They are not too expensive and reach 150m
Henk Bloemink
Henk Bloemink 5 місяців тому
Excellent video! I'm looking for a sensor with a sensing range of aprox. 10cm. to 50cm. but can't find any except the xzg-wb-24g-1. Are there any other types with forementioned range!?
Andreas Spiess
Andreas Spiess 5 місяців тому
Did you look at the TOF sensors I once showed in a video? They cover this range indoors.
yomboprime
yomboprime 5 місяців тому
I bought a TFMini lidar module when you showed it in your LIDAR video. It reached 15 m range with 1 cm accuracy, outdoors, with strong sunlight (the target was 1.5 m, white). It seems better compared to the radar sensor. Also it works indoors and was cheaper, around 40$. A good buy.
Andreas Spiess
Andreas Spiess 5 місяців тому
Truely a good buy! Thank you for sharing your experience.
PRAJWAL NAGRAJ
PRAJWAL NAGRAJ 5 місяців тому
We can’t use lidar in outdoors !? , I have long range lidar 120m , I am using it in my uav for obstacle avoidance
Andreas Spiess
Andreas Spiess 5 місяців тому
Then you are lucky. In bright sunlight some Lidars had issues when I tried them. But I also had one which worked 1500 meters.
Joseph M
Joseph M 5 місяців тому
Found a large error in your experimentation: You are supposed to drink at least two beers for better radar conductivity.
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you for the tip. Will do next time ;-)
Владимир Ленин
Владимир Ленин 5 місяців тому
Very interesting georadar the theme
Andreas Spiess
Andreas Spiess 5 місяців тому
Aha. I do not know how much power these devices need because they have to penetrate material. Maybe these sensors are not powerful enough.
Владимир Ленин
Владимир Ленин 5 місяців тому
@Andreas Spiess it would be interesting to build a georadar based on such sensors
Andreas Spiess
Andreas Spiess 5 місяців тому
Unfortunately, I do not understand what you mean
wjn777
wjn777 5 місяців тому
Very nice video, thank you for sharing. In your expert opinion, what kind of sensor would measure distance through the glass of a car window?
Andreas Spiess
Andreas Spiess 5 місяців тому
I do not know if sensors using laser light travel through your glass or not and if radar has problems with coatings. So you have to try. Or find a project which did what you want to do.
EinzigfreierName
EinzigfreierName 5 місяців тому
In addition to the mentioned frequencies, there are some sensors that operate in the 2.4 GHz ISM band. Automotive radar often uses 77 or 79 GHz.
EinzigfreierName
EinzigfreierName 5 місяців тому
@Andreas Spiess I bought a Siemens KMY24 about 20 yrs ago to play around with doppler radar. It works at 2.45 GHz.
Andreas Spiess
Andreas Spiess 5 місяців тому
So far I never saw 2.4GHz sensors. So good to know. 60, 77 and 79GHz seem to be common these days in the car industry. And I saw that they sell collision avoidance radars with 150m range for less than 50 dollars. Now we just have to hack them...
Rajesh Pednekar
Rajesh Pednekar 5 місяців тому
Hi, Any video on sensors for detection of water in muncipal water pipeline. When muncipal releases water, passive sensor detect water in pipeline checks overhead water tank level, if empty starts water pump and fills the tank.
Andreas Spiess
Andreas Spiess 5 місяців тому
For water level many people use ultrasound. Radar also should work. For flow it is different. I never tried this one.
Rohit Gupta
Rohit Gupta 5 місяців тому
Hahahaha. Pun treasure.
Andreas Spiess
Andreas Spiess 5 місяців тому
:-)
Mathieu Stephan
Mathieu Stephan 5 місяців тому
An easy trick with the CDM320 / HB100 to know direction of movement and looking at the VOUT amplitude with time: if going up it's likely that the object is moving towards you, and vice versa
Mathieu Stephan
Mathieu Stephan 5 місяців тому
@Andreas Spiess I'll publish it all on github the moment I can check it actually works! I can send you one prototype if you'd like... I'll send you a message then!
Andreas Spiess
Andreas Spiess 5 місяців тому
Cool! Your page is very good. Where do I find the info about this board? This looks very interesting! What is the range you get? Maybe you send me a message to exchange the email addresses? BTW: I was not aware that you live in Switzerland...
Mathieu Stephan
Mathieu Stephan 5 місяців тому
@Andreas Spiess FYI I'm the guy behind limpkin.fr... I have a new board on my desk with a new amplification chain and a stm32 to do an FFT on a CDM324 amplified output :)
Andreas Spiess
Andreas Spiess 5 місяців тому
You are right. This is what we tried to do in our bicycle detector. But it was not as easy as we thought...
A Way
A Way 5 місяців тому
Great video. Comment, pir vs radar. In alarm systems radar based detect best targets moving towards or away from sensor. Pir is detecting movement crossing sideways. Pir works like a 1 point temperature meter. The fresnel lens in front creates small areas in the view field. So that hot object moving across will induce big changes. Without the lense it would only measure average heat on area, and not notice movement inside area. Still would notice big heat entering the meter area.
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you for your additional information!
Tutorials Guru
Tutorials Guru 5 місяців тому
Why military always uses X band radars, and not 24ghz or mn wave??
EinzigfreierName
EinzigfreierName 5 місяців тому
@Andreas Spiess The main reason is this: www.rfcafe.com/references/electrical/atm-absorption.htm Attenuation in the athmosphere goes up a lot above 10 Ghz so higher frequencies are not well suited for long range radars.
Andreas Spiess
Andreas Spiess 5 місяців тому
I am not familiar with military technology. Two thoughts: 1. The devices we had when I was a soldier were quite old 2. I do not know if they do not experiment with higher frequencies and do not tell us. A lot was confidential when I was there...
EinzigfreierName
EinzigfreierName 5 місяців тому
The lower the frequency the higher the range because lower frequencies have less dampening. But higher frequencies give better resolution. So X band (~10Ghz) may be a good compromise for many radar applications.
This One
This One 5 місяців тому
Thanks. Useful material.
Andreas Spiess
Andreas Spiess 5 місяців тому
Glad you think so!
Chad Krause
Chad Krause 5 місяців тому
The FM24 NP100 can do distance, so applying the same logic as the Lidar, can’t it calculate speed?
Andreas Spiess
Andreas Spiess 5 місяців тому
It measures 10 points per second. So you can also do speed calculations, you are right.
Assassinlexx
Assassinlexx 5 місяців тому
Have you done ant tests with a dish? Would it focus for better range and direction? Remember to pick up beer for the testing stage.
Andreas Spiess
Andreas Spiess 5 місяців тому
No, I did not do such tests. From my QO-100 experiments you might remember that my 10GHz dish was 1.2 meters in diameter ;-)
SDWNJ
SDWNJ 5 місяців тому
Insert “What are those?” Meme here.
Andreas Spiess
Andreas Spiess 5 місяців тому
:-))
Markus Buchhorn
Markus Buchhorn 5 місяців тому
Vielen Dank Andreas, von Australien :-) Quick question, are the power-draws similar between these sensor types? I have some off-grid (battery/solar-powered) applications in mind, such as camera traps. With the PIR I can also put the esp32 to sleep and use a trigger to wake it, would be nice if I could do the same with a radar-type. Looks like they set a pin high (or at least higher) when detecting presence?
Markus Buchhorn
Markus Buchhorn 5 місяців тому
@Andreas Spiess Thank you! PIR being passive is great for minimalist power, but as you said, sensitive to light/heat changes and have to be exposed. These radar units are an interesting alternative for our outdoor needs, even if they draw a bit of power.
Andreas Spiess
Andreas Spiess 5 місяців тому
I did not measure the power draw. I just measured the RCWL: 2.5mA. And the HB100: 40mA. You get PIRs with much lower current draw because PIRs are passive and do not need to emit anything.
Harri Pehkonen
Harri Pehkonen 5 місяців тому
I would put a cast iron frying pan into my pants before I put my testicles that close to a microwave transceiver ;D
varun koganti
varun koganti 5 місяців тому
These RADAR sensors are to be honest useless. You are better odd taking your cavity magnetron from a microwave(800W-1.2KW transmit power). Use a customer built antenna to measure receive power & use the above as RADAR.
Andreas Spiess
Andreas Spiess 5 місяців тому
Interesting idea. Maybe a little bigger than what we have here. And a little more power hungry... Unfortunately this would be highly illegal. Otherwise I would be tempted to try it.
Homeautomation
Homeautomation 5 місяців тому
Andreas, your radar sensor series inspired me to build a detector to know when my cat is at the door, and want to come in. Problem is that it works to good. I mounted the sensor inside a bean can and then placed it tightly mounted on the wall with the opening of the can facing outside direction, i was thinking it would make it directional and that no reflection could interfere, but no, still detecting me pasing from behind. Is the metal can now acting as an antenna? Any idea how to fix this? maybe a video?
Homeautomation
Homeautomation 5 місяців тому
@Andreas Spiess Brilliant idea! It worked :-) Thank you so much Andreas. Happy easter to you and your family.
Andreas Spiess
Andreas Spiess 5 місяців тому
As I mentioned: The cheap presence detectors are receivers and are very omnidirectional. I never experimented with them. Connecting the can to the ground pin is the only idea I would have.
Poker Player
Poker Player 5 місяців тому
I love your Chanel. Thank you for inspiring a new generation of makers.
Andreas Spiess
Andreas Spiess 5 місяців тому
Glad you like it! So it is worth the time I invest.
Yellow King
Yellow King 5 місяців тому
Which Radar is best for global espionage?
Andreas Spiess
Andreas Spiess 5 місяців тому
I do not know
Tony Fleming
Tony Fleming 5 місяців тому
Love this video, like your other videos you are a wealth of information! Thank you so much Andreas!
Andreas Spiess
Andreas Spiess 5 місяців тому
My pleasure! I hope everything is ok on your side.
Pascal S.
Pascal S. 5 місяців тому
Not influenced by light well this would have become stupid me hand a few years ago :), when I was trying to detect of the blinds are closed with an infra-red sensor, forgetting that sunlight has also infra-red. The sensor was always triggered :). I still have the sensor but recently unsoldered everything. One day I will take a go at it again, now knowing more about sensors and considering using libraries and datasheet :D.
Andreas Spiess
Andreas Spiess 5 місяців тому
IR remote controls use modulated IR (38kHz). Because sunlight is stable it is easy to distinguish between them. You even get IR diodes with 38kHz filters built in for cheap. I once made a video about it if I remember right.
Melvin Maki
Melvin Maki 5 місяців тому
Great tutorial. Did you look at new 60 GHz chips? From Acconeer, XM122? pulse coherent radar, and Infineon doppler, aim to compete with PIR so very cheap in quantity but hard to integrate, short range unless use dielectric lenses, very low power.
Andreas Spiess
Andreas Spiess 5 місяців тому
Interesting technology. So far I did not look at it. I am more interested in the longer range sensors. But it seems that the development towards highest frequencies is fast. So I will have an eye on it.
Mad Mushroom
Mad Mushroom 5 місяців тому
One nice thing about the RCWL-0516 I just found out is, that you can use Pin 5 to get the direct analog signal and write your own detection algorithm. Especially useful if a esp8266 etc. generates false positives on the circuit. You can use the analog signal even for sleep tracking... Btw nice video, as always :)
Mad Mushroom
Mad Mushroom 5 місяців тому
@Whydoes1plus1equals2 The IC pin. On the BISS0001 (very similar to the one used on the RCWL-0516) it is labeled "2OUT" pin. So you have to solder a bit ;) (It is actually the pin 12 in the datasheet. They start counting at the bottom left in a counter clockwise direction).
Whydoes1plus1equals2
Whydoes1plus1equals2 5 місяців тому
Good to know, thanks! I had already written off the RCWL-0516 for my project. So I can just connect the pin labelled CDS to an ADC on my ESP? Or did you mean pin 5 on the IC?
Mad Mushroom
Mad Mushroom 5 місяців тому
@Andreas Spiess Thanks for the clarification. For my purpose the disabled Wifi was not an option because I wanted to implement a presents detection over multiple rooms to turn on and off the light accordingly (as fast as possible). With the one analog pin on the nodemcu and some threshold fine tuning it now works pretty well :)
Andreas Spiess
Andreas Spiess 5 місяців тому
You are right, you get the analog signal on a BISS pin. I never looked in the false positives. It seems they are reported with Wi-Fi modules. According my video the sensors work around 3GHz and Wi-Fi is at 2.4GHz. So the false alarms most probably come from the Wi-Fi signals. So a good algorithm could be to switch WiFi only on after an alarm is triggered.
frogandspanner
frogandspanner 5 місяців тому
8:26 Are the labels for transmitted and received signals the correct way round?
frogandspanner
frogandspanner 5 місяців тому
@Andreas Spiess I had wondered if the graph was in anti-particle space, where time runs backwards.
Andreas Spiess
Andreas Spiess 5 місяців тому
No. Too much beer ;-)
Colin Johnson
Colin Johnson 5 місяців тому
Crocs are ugly but good house shoes. I’m sad they get so much hate.
Andreas Spiess
Andreas Spiess 5 місяців тому
Agreed. I do not know why somebody can hate shoes ;-)
Mr. Q
Mr. Q 5 місяців тому
Nice shoes, I have the same pair. Very comfortable.
Andreas Spiess
Andreas Spiess 5 місяців тому
Yes they are!
LittlePetieWheat
LittlePetieWheat 5 місяців тому
Have you tried adding a horn antenna?
LittlePetieWheat
LittlePetieWheat 5 місяців тому
@Joe Ballony If you bite the hand that feeds, eventually you will starve.
Joe Ballony
Joe Ballony 5 місяців тому
@LittlePetieWheat With a little bit of luck, it is possible to combine multiple sentences into one message and upload once. Produces less noise on the channel. Unless you are trying to work the algorithm and let your message look busy and go to the top. ;-)
LittlePetieWheat
LittlePetieWheat 5 місяців тому
There is also a pattern PDF for the HB100 called Horn-118x90
LittlePetieWheat
LittlePetieWheat 5 місяців тому
n.b. ReflectorHorn1.scad
LittlePetieWheat
LittlePetieWheat 5 місяців тому
YT bot always eats my links :-(
Say Hoe Lee
Say Hoe Lee 5 місяців тому
Swiss accent guy: Metal cause irritation
Andreas Spiess
Andreas Spiess 5 місяців тому
Yes. But not only. All conductive material.
Dmytro Kiktenko
Dmytro Kiktenko 5 місяців тому
"thanks to that guy with the swiss accent" )
Andreas Spiess
Andreas Spiess 5 місяців тому
You are welcome!
micha egi
micha egi 5 місяців тому
Automotive FMCW radars use a fast series of different frequency gradients. By comparing different frequency gradients you can measure speed and distance. In addition they have usually several antennas and can detect also the direction of the signal without any moving parts.
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you for your information. I can imagine they use newer technology. Also phased arrays seem to be used to get some directional information. Maybe we will get them from old cars in a few years ...
micha egi
micha egi 5 місяців тому
@Andreas Spiess I'm not allowed to tell you exact prices. The complete sensor including an ECU that evaluates the sgnals and doing all things like calculateing if an autonmous braking is needed is definetly below 100€ of hardware costs. What I observe is that the next sensor generations become significantly better but not necessarely much cheaper. It seems that classical FMCW isn't used for actual/next sensor generations. They use a method called "chirp sequence".
Andreas Spiess
Andreas Spiess 5 місяців тому
Sounds like great devices! I assume they are quite expensive for now. But maybe in a few years we can get them cheaper.
gl0sek
gl0sek 5 місяців тому
I bet Marvin was doing all the sounds from behind the camera ;)
Andreas Spiess
Andreas Spiess 5 місяців тому
:-))
saltima
saltima 5 місяців тому
only HB100 is omni-directional? the ones with metal cans are more directional?
Andreas Spiess
Andreas Spiess 5 місяців тому
Mostly the first category is omny-directional. The speed sensors work directional.
Amal Irfan KC
Amal Irfan KC 5 місяців тому
Perfect, now I can ditect when missiles are targetting my house.
Andreas Spiess
Andreas Spiess 5 місяців тому
Probably too late (because of the small range)...
neithere
neithere 5 місяців тому
Love your videos. Educational, practical, concise, perfectly structured, with subtle humour woven into the fabric.
Andreas Spiess
Andreas Spiess 5 місяців тому
Thanks. Glad you enjoy them!
Stan Linke
Stan Linke 5 місяців тому
Andreas, 10:47 hast du ein Surface?
Andreas Spiess
Andreas Spiess 5 місяців тому
Ja. Mein Business PC
Andre Rodrigues
Andre Rodrigues 5 місяців тому
That sounds like a justification for a couple of extra beers!! 🍻
Andreas Spiess
Andreas Spiess 5 місяців тому
Good idea! Now it gets warmer here. Seems to be perfect timing.
TheDaniel366Cobra
TheDaniel366Cobra 5 місяців тому
Ooh, we finally get reasonably cheap FMCW radars for hobby projects! The UART on the FM24-NP100 sensor has an Rx pin. The factory manual says it's reserved. Maybe it could be used for modifying settings like radar power or update frequency?
TheDaniel366Cobra
TheDaniel366Cobra 5 місяців тому
@Andreas Spiess I also did not dig past the manual. In fact, I hadn't found much information about it at all. Google gives me various links to shops selling it and not a single Github or other DIY project. I am thinking about contacting the manufacturer for some info.
Andreas Spiess
Andreas Spiess 5 місяців тому
I did not find any information on the input specs. But maybe I did not dig long enough.
altamiradorable
altamiradorable 5 місяців тому
Who needs a Swiss knife when you have Andreas in your life !! Danke von Kanada meine freund !
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you! Greetings back to Canada.
Cliff Chism
Cliff Chism 5 місяців тому
Considered putting the sensor on an oscillating stepper or servo and trying to map the environment? Might also give a better idea of the directional characteristics. Have another beer or two. That will make it work, for sure.
Cliff Chism
Cliff Chism 5 місяців тому
@Andreas Spiess especially with all the drones zooming around inside the house.... DUCK!
Andreas Spiess
Andreas Spiess 5 місяців тому
Another viewer found the reading frequency of the distance radar: 10 Hz. Probably a little slow, but it would be cool to have an "air traffic radar" at home...
Tricky Rat
Tricky Rat 5 місяців тому
Now, about your shoes.. :)
Andreas Spiess
Andreas Spiess 5 місяців тому
:-))
TheRainHarvester
TheRainHarvester 5 місяців тому
Great video! Which one would YOU use for a driveway sensor to detect cars/humans walking up a long driveway surrounded be trees?
norm o'meara
norm o'meara 3 дні тому
@Andreas Spiess I had some luck separating the ESP and the sensor. I wire a 3.5 mm audio socket into my enclosure and connect the IO pin and power to that. I have a matching socket on the enclosure for the sensor and they connect together with a standard 3.5 mm M to M cable. I also include a capacitor in the box with the sensor to level out power issues.In this way I can swap out sensors easily. Just make sure to power off the device prior to plugging or unplugging the sensor or cables.
Andreas Spiess
Andreas Spiess 5 місяців тому
You can try a couple of the first category. But people report false alarms with ESP boards in their vicinity. Maybe the HB100 with electronics could be a choice. But I never tested its range.
Whydoes1plus1equals2
Whydoes1plus1equals2 5 місяців тому
Would the radiation pattern of the modules allow them to be used in combination with a reflector?
Andreas Spiess
Andreas Spiess 5 місяців тому
Maybe. But because of the short wavelength everything has to be very precise.
Ben Puylaert
Ben Puylaert 5 місяців тому
Notwithstanding the beer, I should like to indicate that Transmitted and Received signals are mixed up. With reference to www.radartutorial.eu the red line should be transmitted signal. The green line the received signal.
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you for the correction! You see, I should listen to my wife and not to drink beer ;-)
st1300 r
st1300 r 5 місяців тому
Thesignalpath might know of the cost of the 95 Ghz car proximity sensors. I think Iremember him mention price on a tare down video.
Andreas Spiess
Andreas Spiess 5 місяців тому
Thank you. Great channel! I have to check if I find the video.
Daniel Forrest
Daniel Forrest 5 місяців тому
Thanks for the great content. Have you seen, played with any of Vayyar's products? It would be interesting to see one of these in your hands..
Andreas Spiess
Andreas Spiess 5 місяців тому
No, I did not know these products before. But I also did not find a price for the Vayyar home. I think I heard once about the Walabot (a few years ago when it was introduced)
Lost In Tech
Lost In Tech 5 місяців тому
I had this gun thing intended for golf, which could tell speed over really long distances as well as measure long distances. It used laser, but no laser was visible. I no longer have it, and I never really worked out how it worked so well. It worked in daylight up to 400m! Honestly it scared me because I kept looking into the wrong side and feared I would injure my eye :)
Andreas Spiess
Andreas Spiess 5 місяців тому
Aha. Mine was also able to measure speed of cars. This seems to be quite "normal" these days. But it is definitively good not to look into the beam...
Lost In Tech
Lost In Tech 5 місяців тому
@Andreas Spiess oh no, I don't play golf. I was measuring car speeds. I don't think it would work with a golf ball :)
Andreas Spiess
Andreas Spiess 5 місяців тому
I once made a video about a probably similar device. It was able to measure distances to 1500 meters in daylight if I remember right. But it is interesting that yours worked with a flying golf ball! A very small target.
xvolodea
xvolodea 5 місяців тому
Thanks for your nices videos. Whicn device a need to mesure altitude under 1000 meters above the ground ?
Andreas Spiess
Andreas Spiess 5 місяців тому
The worked also during night. But it was hard to aim. Aiming would probably not be a problem for your use case.
xvolodea
xvolodea 5 місяців тому
@Andreas Spiess Thanks for this informations but I need also by night alitude mesurement, so daylight is not appropriate.
Andreas Spiess
Andreas Spiess 5 місяців тому
I once made a video about a device which was able to measure up to 1500 meters in daylight. Unfortunately it had no interface. But maybe you find such devices with interfaces now. That should work for your use case.
Dumah Brazorf
Dumah Brazorf 5 місяців тому
I know the pain Andreas... it's easy to get wasted on a project. It happens to me every weekend. But it's for science, tell your wife!
Andreas Spiess
Andreas Spiess 5 місяців тому
:-)) Fortunately she is forgiving. This is why we still are a couple, I assume.
Dim Moos
Dim Moos 5 місяців тому
Very useful in 11:16 ,sensor table for right chose.
Andreas Spiess
Andreas Spiess 5 місяців тому
Glad it is helpful!
Mario Wolff
Mario Wolff 5 місяців тому
#VideoRequest #offtopic I would like to see something about Zigbee on Microcontrollers. Something like "Build your own Tradfri controllable lamp without Gateways, zigbee2mqtt or Raspberry".
Pascal S.
Pascal S. 5 місяців тому
I worked with ZigBee in a recent university project, it was an painful. At least for the BitCloud Stack implementation is not recommended. 1: Exept for the vendor datasheet, and the compiled html file, there is no documentation. 1.1 The search function is half broken. 1.2 the HTML file documented every method but the explanations where so spare that it was often easier to open the actual implementation .c .h files and go through the code yourself. 2: very little help on the internet. 2.1 Most help didn't even bother to use the methods because they where so unusable documented rather choosing to use direct register access via c. So basically "high level" assambly like coding in C. 3: forget libraries there aren't any for any sensor using the BitCloud Stack 3.1 If the library is in c++ forget it, no c++ support. 3.2 If the library is in c you might be lucky. 4: you really have to watch out for timing, callback execution is limited to 10ms Application Taskmanager to 50ms For an application which would take like a day to develop in Arduino if you do it fancy takes like 4 to 6 weeks in Bitcloud. I could go one but I leave it at that. While I like ZigBee, just recommend don't use the BitCloud Stack you will regred it.
Andreas Spiess
Andreas Spiess 5 місяців тому
So far I always used ready-made zigbee devices because they are very specialized and do not use a lot of power. Our typical processors are in a different range and would not work for such a long time, I think. Building a sensor using Zigbee is on my list, but not a lamp.
NB Sneakers
NB Sneakers 5 місяців тому
Hi Andreas, thanks for the great video. I love your know how! Thanks Andreas 😘😘😘😘😘😘😘😘
Andreas Spiess
Andreas Spiess 5 місяців тому
My pleasure!
Paul pvhl
Paul pvhl 5 місяців тому
I think your videos will always be useful and interesting to me, no matter what you're teaching. I want to open source experiment with WiFi radar ideas on a boat at sea (won't use it at harbour, will limit range, and I'm in a relatively empty part of the world (greetings from the west coast of somewhat north Canada)). Do you happen to know if there's any projects for this sort of thing, or similar with SDR? I used to work on fixing CAT scanners decades ago, and I've been getting thoughts on how a pause/chirp&listen/rotate antenna could be a sort of inside-out CAT scanner using similar matrix math (must all be out of patent by now and well understood, though not by myself necessarily). I want very cheap radar (and sonar would be similar) that can be analyzed and reacted to by a Pi or Jetson Nano that is also tied into AIS and a special boat network. Any thoughts?
Paul pvhl
Paul pvhl 5 місяців тому
@Andreas Spiess Thank you Andreas, I shall look into them.
Andreas Spiess
Andreas Spiess 5 місяців тому
I am by no means a radar specialist! They start now to build variable beam antennas for WiFi (MiMo, phased arrays). Maybe this opens possibilities for other applications? They should be reasonably priced because they are also used in consumer devices.
Allan Høj
Allan Høj 5 місяців тому
Maybe one beer wasn't enough, or the alcohol level was too low 🤣 Great video 👍
Andreas Spiess
Andreas Spiess 5 місяців тому
Well possible. Maybe I have to increase the dose for the next experiment ;-)
gyuri911
gyuri911 5 місяців тому
Are you going out again for drinking?? No, I just want to appear on the radar
Chris Draper
Chris Draper 4 місяці тому
The beer does help - if you have several - then the problems just go away!
Andreas Spiess
Andreas Spiess 5 місяців тому
Exactly! Always innovation on this channel ;-)
saxpert
saxpert 5 місяців тому
Maybe more IPA testing cycles are needed to get more significant and reliable data....😝
Andreas Spiess
Andreas Spiess 5 місяців тому
True. Summer is coming and I have to retry the experiment ;-)
Nigel Johnson
Nigel Johnson 5 місяців тому
An advantage of radar over PIR is that it will continue to work when ambient temperature is close to human body temperature. I discovered this in the heat of last summer, when our outside pir sensors stopped working, becoming blind to body heat, even during the middle of the night.
Andreas Spiess
Andreas Spiess 5 місяців тому
True. This is what I meant in my table with the last column. But you explained it better than me.
N. Steenvoorde
N. Steenvoorde 5 місяців тому
Maybe George Hotz with his #openpilot on comma.ai is something to be aware of. I don’t know which sort of lidar he uses, but it looks very promesing. And again a really cool episode @spiessa to watch on the sunday 👍
Andreas Spiess
Andreas Spiess 5 місяців тому
I did not know this project, thanks. But looking at its price it seems to be incredibly cheap. So I assume he has to save on sensors, also because it is retrofit. So I think too that it is heavily camera based. But it is impressive!
micha egi
micha egi 5 місяців тому
As far as I know he stopped the project when the NHTSA asked how he want to ensure safety. But maybe we makers can use his work for less critical projects.
traxonja
traxonja 5 місяців тому
He is not using any sensors, only camera on the phone.
Sammy K
Sammy K 5 місяців тому
Maybe wrong kind of beer? Try Pale Ale, Pilsener, Stout, Weissbier, Bock and Blonde. For the greater good of science!
Andreas Spiess
Andreas Spiess 5 місяців тому
Good point. I have to get exactly this choice tomorrow when the shop opens ;-)
Christian De Santis
Christian De Santis 5 місяців тому
Did you forget to include the link to github.com/G6EJD/ESP32-8266-Audio-Spectrum-Display ? He also has a youtube channel, www.youtube.com/user/G6EJD, feel free to check it out
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