This is very interesting, I'm looking forward to see more of the innovative details. How about pedestrians, skaters runners, etc in the same speed range? How will you avoid counting those as bikes?

2 years in: still loving the guy with the Swiss accent.. my #1 go-to guy when I want to be informed about IoT, electronics and home automation!

What an incident - yesterday in the evening i thought about that and now the Swiss guy shows solutions. Keen on part 2 of the Video. Thank you and 73 from Germany

I love this channel. It's one of the few things capable of pulling me away from my books and my work-bench. Your body of work here is a modern-day Principia Mathematica for the electronics student, hobbyist, and even a 'How To' for engineers. This is what every UKposts channel should strive for - high quality content. Thank you. I was just thinking that now, 4 years later, we could probably do all of this, including everything from speed capture, to direction, to identifying the moving object, all with just an esp32 and camera combination or something similar in price, and of course a whole lot of mathematical analysis of the video pixels. Everything has been reduced to ever cheaper sensors and an ever-growing, ever-improving body of sophisticated, free firmware. We live in amazing, (and fun,) times. You had mentioned to me that electronics engineering has of necessity moved from fundamental physics to ever higher levels of abstraction with correspondingly different bodies of knowledge, and you were so right. BTW, I once escorted Bill Hewlett down to the security guard at the front desk at HP in Colo. Springs. I worked making CRT's on the night-shift there in a near empty building. He was nosing around the R&D cubicles without a badge, and I didn't know who he was. :)

Looking forward to seeing your implementation of the theory.

This project inspired me. I now have this setup working with weatherproof neopixels that create a display based on the speed measured. Thank you.

Was waiting for this video!!! Awesome! Looking forward to knowing the accuracy of these two sensors at different speeds!

A very interesting video in an area I will experiment with myself. I lived in CH for seven years returning last October to retire in the UK. The pictures make me feel homesick in a strange way. Lovely country. I miss it a lot.

Another fantastic video😀😀👍 You make it sound so simple and after the next video. I am sure it will. Bravo Andreas and congratulations on your 257 Patrons which appear to be growing by the day. As always your outstanding efforts are always worth the time to absorb.

Cannot wait to see more in this series!

Thanks Andreas, Great info as always

That was an awesome video Andreas! Thank you!

Thanks for pointing to my channel. :)

This is a wonderful video. Thank you sir!

The bicycle demo is really good to explain it

great explanation and wait to see more. Love the idea of a budget speed camera

What an interesting project. Great work!

Servus Andreas, Here you amaze me once again with a topic that I did not see coming. 😀 Keep up the good work. I'm looking forward to seeing more on this very interesting topic.

This was one of the most interesting videos I've seen in a long time! Very cool!!

Wow, This is how you make a video. Impressive on so many levels.

Wow, an awesome video! I am hoping that you can hook up a display or send a signal back to MQTT with the speed data from the object and maybe even trigger a camera based on the recorded speed of the object. My love of electronics and RF are always rekindled when I watch your awesome channel. As an old school electronics technician myself, I wish we were not separated by such a large geographic distance. I am slightly jealous of your assistant in the video, having access to the master Andreas Spiess, I hope he is aware of how lucky he is!. I am fondly reminded of days long ago when my old crew had a lab and we built various electronic devices, this is why I love this channel! I hope you win the contest! Thumbs up, loyal fan / subscriber, -Ernest 73s W3TCP

My mind is blown, can't wait for more.

Nice video, I look forward to the next video. Thank you for the Information and for sharing it with us.

Excellent presentation and infomative, well done.

I seriously like your videos and learned a lot about electronics (I'm more into software engineering). Please, keep up. You're awesome.

Your videos always make my day, danke Andreas

Looking forward to part two. Cheers :o)

Thanks for the video! Just checked the price for your new toy, WOW not cheap !

Thank you for your video, I am also planning on measuring cars next to my house. It is allowed to drive 100 here, but most people drive 150 if not faster. So I wanted to make an education project out of that and measure cars and save it in a database. This helped me!

This video is really helpful, thank you!

Abso-smurfly wonderful video you’ve got here, mon capitain! Thank you for providing this content!

Mannn, your videos are magic!! Great idea to put sound to hear the distance!! This is more than just science!! its fun!! Thanx a lot!!

Super interesting subject and well presented!!!!!

I was confused. When you showed the first picture of the mixer I thought the output went to the transmitter but it actually goes to the op amp for amplification. Ugh ! I must of watched that part of your video 4 times until further on the video cleared when the receive & transmitter antennas were shown in the schematic. Awesome work. Thank you.

Highly appreciated your videos. Great when such initiative could get helping. Have you considered looking over a AC Volt&Amp&Watt Meter WiFi logger?

Awesome project

Great video as always sir!

Hi Andreas, What a nice subject for our makers. A lot of people think of using this technique in other purposes than it was supposed to, just for switch on lights or opening doors. The thought’s I had where quite te same as most of the repliers, but some questions stayed after reading al the comments and answers and other posts in other channels including searching AliExpress for the most suitable radar module. My application is quite standard for radar and is also almost identical as what you did. I want to display the speed of Skiracers at the piste on a display and send the speed to a central server to store the speed, in combination to the time registration from another project. My first plan was to set it up with two optical reflective gates, at a distance of some 5 meters and calculate the speed. This is common technology, but the racing suites are often white and do also reflect the optical beam when passing the speedtrap. So a speedtrap with separate beams and detectors looks more reliable, but takes to many physical components to set up. Besites that, synchronization of the time base on both the traps for precise messurement and setting the speedlength is also a hassle. Then, as a recent viewer of your video’s, I found this item about speed measurement with cheap components. It surprises me, how simple the units are and how accurate the measurements can be. But when reading more about these units and solutions people talked about the maximum speed that you can measure with this solution. Our racers can go as fast as 120Km/h, so the limit can be an issue. Also the measuring distance can be an issue, but 10 meters is quite nice for this. But are the racers then not passing the sensor to quick to make a reliable measurement? And if the sensor is ‘always’ on, for detecting movements, how can I trigger the right moment of passing at the highest speed, without showing zero’s after the racer has passed. These last questions are for me to solve as a maker, but the question about the limitation of the speed measurement is tricky for me. The second thought is which sensor to buy. In the meantime some more sensors where added to AliExpress and there is a wide range of types now, 10,525Ghz, 24Ghz, 5,8Ghz etc. The new CDM324 is 24Ghz and is advertised as 15 meter detection range. It looks as this unit is simplified version of the CFK024-5A unit, which is much more expensive, but has more pin’s and options, including FMCW/FSK/CW. So if anyone had built a similar speed measurement unit without that works, please point me to more details to prevent me from spoiling precious maker hours. In the meantime I’m looking forward to the sequel of this amazing video series. Regards Johan

In 1974 the Department I was working for got our first updated digital display radar. It was X-Band. I was on duty one morning (read night shift near ending) and since there was nothing happening in the town, I parked the squad car under the sun shield over the A&W drive in, to watch traffic on the Highway that went through town. I was not running Radar at the time since the angle was too great to get any accurate readings, but it was on, and the volume on the head was turned up a bit. I began to hear ZIP! and a bit later ZIP! there were no cars but on the digital read out I was getting 104 MPH and faster flashes. As I studied this phenomenon I noticed that the swallows who nested in the over head cover were diving down to the ground after worms or insects, the radar was reading their speed. I began aiming the cone at the particular birds and the readings got faster as the angle decreased. It was actually a fun thing to do with the big old units.

Great and surprisingly interesting video. Btw, I defenately would like to have that Keysight equipment. I remember the HP and Agilent as being excellent... but also very expensive.

Very interesting! Can you please go into more detail on the direction detection? With the Ali sensors in particular :) keep up the good work!

Excellent idea! I have to test it. Fun fact: I thought it's elektrovelo before I realized the sound is produced by the amplifier and speaker :)

Thanks for sharing 😀👍

What a terrific educational channel!

Great video! Greetings from Andreas on Off Grid Sweden

Great project, can anyone direct me to the follow-up video (pt2), thanks for all the great content and detail(s) you provide. You are someone we can trust, for sure!!!

Thanks for the video!

Excellent video and very interesting sensors. Please let's build a radar gun. Awesome

To messure only frequency, the signal is very often staged throug a comparator. This gives a nice square frequency. As far as i know, Atmel AVRs have one build in. Or just use a OPamp. Then feed to an input capture pin and the time os messured.

Thanks for this introduction and the Pictures from inside the CDM324. I did not open the mine. I only had to open one of my HB100 arriving with a loose rattling disk of this dielectric resonance oscillator. The arduino FFT works with the ESP32 just fine out of the box. Even with 1024 and 2048 samples. I am very curious how the InnoSenT quadrature radars will perform and what they cost. Also the AGC amplifier could help. Sounds promising.

Outstanding!

Msybe I should have done this, by the way use the 24 Ghz and some range sensor in software. That is correct the screw is a fine adjustment. You need range gates for distance as well. Doppler radar maybe you could use pulse radar. Nice work Andreas.

Thanks, great video!

Awesome video. I was also using an HB100 in combination with an arduino for simple motion detection. I am looking forward to your solution.

I like the direction this project is going. :-D

Excellent subject and project idea. You pedal that bike around like a 20 year old. I was waiting for tricks - riding on one wheel, standing on the seat, etc.

Very informative video, thanks. Can this be used for collision prevention in a drone?

Gracias! Excelente video! 👌

Hello Guy with the Swiss accent, I am a great fan of your channel and thanks to you I have built a lot of projects and Every one was successful. You are truly a great guy.. Can you do a project on building a speed gun radar detector to be used in the car using commonly available sensors and microprocessors. It will be really great project. The currently available sensors in the market are pretty expensive. Also as a maker it will be great fun to build one on our own. Thanks

And another one. Thank you

Awesome video!

Very interesting and cheap. I am going to put one of those on my list to order. Small typo in the description. You have the amplifier as LN386 as opposed to LM386. Recently I used a LM386 on a guitar amp build. I have all the discrete components to make one and its easy to design but at US$1.15 shipped its just not worth the effort and time. Interesting times for electronics with cheap parts and oscilloscopes. Even phones with all their functionality really are a marvel compared to what I had available when I was young.

Wow, great video and so informative. One thing, the diagram near beginning is showing stretched frequency in forward direction and compressed travelling away. Think it should be opposite.

Nice video! You may also try to use a LM2917 if you want to go full analog

Thanks!

You could try adding a horn to the antenna to make it more directional and longer range. I have a couple of old 10GHz speed guns dating back to the early 70s which use microwave diodes in cavities attached to a horn, dedicated 7400 series logic and nixi tube display.

Great video, I suggest you to use two sensors facing opposite directions at least, then with some calculation you can understand who is entering and who is exiting using the Doppler effect formulas.

Amazing.

Thanks Mate

Great video! Subscribed. Had an idea once - try to make a photo radar for a fraction of price of the ones that government buys. Should be very easy.

Good work and very convincing presentation. What happens in the caseof more than one moving target? you would need a more discriminating software? or do you have simple solution?

Great channel I subscribed

The purpose of the "unknown material" at 12:10 is to prevent any resonance within or oscillation due to the shielded enclosure; in this case, it appears to be the ubiquitous "conductive foam."

such great oscilloscope!!!!!

I had no idea you could do that with those sensors. Maybe you can use the stm32 'blue pill' type boards in your device since its super fast. GreatScott did a video on it this week.

bin schon sehr gespannt auf das nächste video :)

Great video. I will have to try this. I was wondering about using the microwave sensors for range detection (distance).

Thanks for your video it's very complete.I want to know, did you implement this sensor with the ESP32?

Thank you Andre for your great videos.I have a question, can i use this hb100 to build commercial police speedometer gun?

Very nice project. I'm really impressed. Please be aware about radar frequency regulations in your country.

Hi Andreas - another great video - many thanks! One quick question - you can detect bicycles at around 20m. Give that speed and, i would think, size would affect the output signal, how far away do you think it could detect a car travelling at normal car speeds (say 60km/hr) - I am thinking 100m or more maybe?

Very interesting! I would like to know more about that counting statistics with LoRaWAN.

Rather than doppler effect, it is easier to understand as interferometry because you are sending and receiving the same signal. So this sensor can do a very accurate measurement of movement distance, just count output pulses

Great video! I wonder if arduino fft would be fast enough to perform calculations and update a display or if the processing would be too slow to do it in real time

you are a legend, Andreas, this is sooooo cool did you already combined the mw sensor with a lora board?

Another fascinating and informative videos Andreas! I wonder how the sensor will cope with more than one bicycle at the same time? Will the sensor output multiple frequencies for the different speeding objects? Also if two bicycles were close to the same speed (side by side for example) would it be impossible for the sensor to tell. A very small limitation perhaps but a very interesting sensor.

many vids - saves lottsa time

Great Video!! Could you not use two or more of those $6 sensors back to back for an easy direction count cheat? One may have to be detuned slightly via the screw to avoid interference...

Very interesting indeed! I have been think about a speed for cars that warns you of your current speed as compared to the posted speed limit. The problem is the price? My community has several elementary schools so wouldn’t it be great is their was an affordable alternative whereas affordable LED’s are available now!

This is a very interesting project! I am interested in making a little speed gun that would be able to measure tennis serves / baseball pitches. Do you think these components would be accurate enough? If not, do you have any suggestions for better radar sensors?

Awesome Andreas :)

very very cool

Great video! Would weather conditions have any effect on these sensors?

Thanks for the Vid. Thats what I looked for. What would you say the Maximum measurable speed is?

the screw of the HB sensor does shift the freq, confirmed with HP5350B, have fun

It makes a nice sci-fi noise too.

Hello Andreas. If possible include some experiments to increase the distance range of the sensors please. This would be very helpful.

Was there ever the follow up to this? This was an excellent video!

Hi Andreas, I was thinking about using one of these sensors to create a speed gun for a baseball. Do you know if these sensors handle small objects well? Another question is what is the max speed these sensors are effective in measuring? Love your videos, thanks!

Nice i feel a step closer to build a golf clubhead speed reader.