#334

День тому

How to power our projects is an important question. In this video, I will focus on "mains powered" projects, and I try to establish a step by step approach to get to the right decision.
I am a proud Patreon of GreatScott!, Electroboom, Electronoobs, EEVblog, and others.
Links:
Decision tree: www.dropbox.com/s/9klzs7fvobw...
Baseus QC charger: s.click.aliexpress.com/e/_d87iZrP
Standard 5-12 volt PS: s.click.aliexpress.com/e/_dYlfHLf
AMS1117: s.click.aliexpress.com/e/_dWf8hVL
Good Buck converter: s.click.aliexpress.com/e/_dZcvqMz
Another buck converter: s.click.aliexpress.com/e/_dT0c4B3
LM7805: s.click.aliexpress.com/e/_d6ianXX
12V Switching power supplies: s.click.aliexpress.com/e/_d6p7uYl or bit.ly/2XnITvF or amzn.to/3gn5eT5
USB charger tests: lygte-info.dk/info/ChargerInd...
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КОМЕНТАРІ: 520

@stevehallam0850 4 роки тому

Useful, battery supplies next please 👍

@AndreasSpiess 4 роки тому

Noted!

@jameszahary 4 роки тому

@@AndreasSpiess You could also say a few words about "wires" -- people have a lot of trouble with esp32 brownouts that seem to be caused by long thin wires -- either cheap usb cables, or breadboard wires -- coming from a decent battery or usb supply, but the wires can't handle the current.

@DailyCakeSlice 4 роки тому

Andreas, I can't even begin to describe to you how indispensable you are to the maker community! Thank you for everything you do! I would love to see your explanation of battery powering devices. Keep up the great videos, as always!

@paulalmquist5683 4 роки тому

Well put on both counts, I fully agree.

@AndreasSpiess 4 роки тому

Thank you for your very nice words!

@jonathangardner4475 11 місяців тому

Question: if I want to connect my phone to a buck converter ran by a battery, do I need to worry about the amp capacity of the battery frying my phone? Does a phone limit amperage used?

@CristiIstrate 4 роки тому

Battery powered and solar charging, for a external weather station will be nice to discuss.

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@manliomalavolti9640 4 роки тому

Really, there were a couple of videos from Andreas concerning this specific subject, the series was abruptly interrupted due to lack of sun

@nousername955 4 роки тому

I agree!

@Kevin192291 4 роки тому

@@AndreasSpiess I really want to know about this!!!

@estebanalarcon7340 4 роки тому

I agree!

@dl8cy 4 роки тому

Nice overview ... and yes do it for battery solutions too (please) - 73 from Berlin

@AndreasSpiess 4 роки тому

Thank you! Maybe I should include all videos already done by me for batteries...

@Auxrad39 4 роки тому

I love the "swiss guy" method of checking how hot the regulator gets , also as Cristi Istrate battery and solar charging for a remote weather station would be great to see, again thanks for the great info :)

@michaels3003 4 роки тому

This method is actually used planet-wide. It works as long the reaction time by the tester is quicker than a rapid temperature increase. Putting some water on a fingertip will give you little bit more time to react.

@AndreasSpiess 4 роки тому

Noted!

@acrodrigues1 4 роки тому

8 years in switzerland and is the first time I heard of such a swiss precision thermometer!

@jost459 4 роки тому

only the watches are more precies ;-)

@AndreasSpiess 4 роки тому

You see, it is worthwhile to sit in the first row ;-)

@wbfranks 4 роки тому

Using your calibrated finger as a thermal sensor brings back memories from my old power supply design days. We would touch a hot device and if you could say 'supercalifragilisticexpialidocious' without removing your hand its ok. An approach that proved surprisingly accurate when confirmed with more sophisticated thermal instrumentation.

@AndreasSpiess 4 роки тому

Humans have excellent sensors, I think. And many survived over the centuries without sophisticated instruments...

@mewintle 4 роки тому

Your videos are always wonderful, but this was was especially good. Very clear, concise, friendly, educational, and super-helpful. I feel much more confident in my knowledge of this topic now, and what choices I have available. Thank you!

@AndreasSpiess 4 роки тому

Thank you for your nice words!

@Sekir80 6 місяців тому

As a noob into ESP32 projects I approve this video! Thank you very much for making these!

@AndreasSpiess 6 місяців тому

Glad it was helpful!

@EsotericArctos 4 роки тому

Thank you for bringing this video and the knowledge to us. I would definitely be interested in seeing the Battery Power part of this and solar also.

@AndreasSpiess 4 роки тому

Will do!

@lsual 4 роки тому

A really informative video! I'd love to see you cover the other methods for power supply as well.

@AndreasSpiess 4 роки тому

Noted!

@1DR31N 3 роки тому

I was trying to give some advice to a friend about this, but then I found your video, much more than I can say. Thank for this precious lecture.

@AndreasSpiess 3 роки тому

Glad I could help!

@martinwinfield2935 3 роки тому

Thanks for a logical approach and working through the different PSUs very informative.

@AndreasSpiess 3 роки тому

Glad it was helpful!

@NimaSajedi 4 роки тому

Thanks Andreas. I'm looking for the next episode regarding battery supplies.

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@DialM4Microcontrollr 4 роки тому

Love the decision tree. Yes, please do a similar video for the battery powered. Thanks!

@AndreasSpiess 4 роки тому

Will do!

@albertomazagatos1897 4 роки тому

Yes, please. A battery’s focused one would be much appreciated. Cheers!

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@benfranklin4524 4 роки тому

In thinking over what I have learned from you, I have FINALLY decided to sponsor you on Patreon. Thanks for your efforts!

@AndreasSpiess 4 роки тому

And thank you for your support. It is appreciated!

@benfranklin4524 4 роки тому

@@AndreasSpiess I thought you might thank me, but let me thank you for teaching me so many, many things! ...and I really enjoy the Swiss accent! :)

@luisdamed 4 роки тому

Thank you for the overview. Yes, please make a video about battery powered projects!

@AndreasSpiess 4 роки тому

Noted!

@jeucedahn 4 роки тому

As always, a lot of very useful information on a short video. Thanks a lot!

@AndreasSpiess 4 роки тому

Glad it was helpful!

@simonheaton4586 3 роки тому

Extremely helpful as always. Thank you! Battery focused episode would be great.

@AndreasSpiess 3 роки тому

Noted!

@jorgeramalho8386 4 роки тому

Very useful to remember some concepts and tricks. Could be interesting if you can do a video on the battery part too. Many thanks, Jorge.

@AndreasSpiess 4 роки тому

Noted

@scrapwomblecreatives6944 4 роки тому

Andreas your brain is like a black hole soaking up all knowledge then firing it out like a beam of inspiration across the network... thank you for sharing

@AndreasSpiess 4 роки тому

Thank you for your nice words!

@sairfan06 3 роки тому

Thanks for the video, sure we will be waiting for video on battery powered and solar

@AndreasSpiess 3 роки тому

Ok. Thanks

@GeorgeWMays 4 роки тому

Good one. Thanks for sharing your thoughts on the topic. I agree completely with your thinking and would be interested in how you approach this topic from a battery-supplied application. Thanks again!

@AndreasSpiess 4 роки тому

We will see... Your wish is noted.

@jost459 4 роки тому

@Andreas Spiess Thank you I think the swiss guy method to check the heat sink temperature damage your finger ;-) To take an external adapter is for most hobbyist the best solution. No high voltage inside the system. Maybe also less EMC problems. To take one of the silver chassis power supplies a hint for earth connection seems recommended. Also if people take a more power full power supply for low power systems as ESP or Raspberry Pi an additional fuse on 5V side is also recommended. Otherwise a short circuit on DC could damage your application. A fire also could damage your room or house. Sometimes I saw on youtube that people take an adapter or silver chassis power supply --> psu inside a box without ventilation holes. Then you have to measure inside temperature and check datasheet of psu to find out at derating curve which power the psu will deliver at 50 or 60 degree. Attention! The power supply will not derate automatically. Good ventilation with fan or holes is also suggestet.

@joinedupjon 4 роки тому

I think my grandmother used a similar method for checking the flat iron was up to temperature :)

@AndreasSpiess 4 роки тому

I always have to concentrate a lot to get videos short. So I cannot cover all aspects. Concerning fuses: There you can see the character of a person. I would check that aspect before marriage. My character tends to "fewer fuses" ;-)

@jaspervandervorst1551 4 роки тому

Very useful video. A similar episode about battery power would be very much appreciated!

@AndreasSpiess 4 роки тому

Noted!

@sidharthap 3 роки тому

i love power supplies, i'd love to see your video on battery supplies, actually all the types of power supplies really!

@AndreasSpiess 3 роки тому

Noted!

@akguni 4 роки тому

Thank you Andreas, excellent video. Although it confirmed my assumption that recycling the usb power adapters in the house is the best methhod for powering my simple projects I learned 2 important lessons: 1- I have been wondering for YEARS why anyone would still choose a linear power adapter, when the newer switching models were so much smaller, efficient and cheaper. You answered this very clearly. 2- I also had bought a number of 7805's "just in case" I need them - since they seemed to be so commonly used in many projects - but I also read some people dismissing them as inferior compared to other regulators. Now I know what they are talking about. Finally: Yes please I would be very interested in a similar video about battery powering options.

@AndreasSpiess 4 роки тому

The 78XX are nearly as old as I am. So for sure you get better ones these day. But they work for mains powered projects and are cheap...

@steveroberts1861 4 роки тому

Another great video. Thanks Andreas

@AndreasSpiess 4 роки тому

You are welcome!

@DustinWill 4 роки тому

Another great Swiss Guy production. Yes to the battery and solar charging. I need help cutting the cord!

@AndreasSpiess 4 роки тому

Noted!

@simoncollins6650 4 роки тому

Yes battery vid probably now the most useful as most will use this type to power projects. Alsoand for an alternative update the UPS video and more boards about

@AndreasSpiess 4 роки тому

I have some boards in the mail. Since quite a long time :-(

@michaelangellotti5741 4 роки тому

As always many thanks. My current project is an environmental sensor using the LoRa technology (TTGO LORA32, BME280 plus an analog temp sensor, LiPO 1S battery, maybe solar charger). For use in lobster and mussel farming. Working on the electrical requirements now (i.e. voltage supervisor?, regulator needed?, anything else?). Hoping to get 2 years maintenance free. Looking forward to your next video.

@AndreasSpiess 4 роки тому

Always good if projects create a real value!

@andersjonsson3650 4 роки тому

Thankx. Very useful info. Yes please, do a video on battery powered devices.

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@felipebruschi7592 4 роки тому

I love your channel and your explanation, thanks for sharing your knowledge! The best method is the "swiss guy".

@AndreasSpiess 4 роки тому

Thank you for your nice words!

@leestephens1137 4 роки тому

Thank you, very useful and interesting. Also, yes please for the battery version. I would also like to see solar + battery. Thank you

@AndreasSpiess 4 роки тому

Noted!

@chuxxsss 4 роки тому

Alway love old server power supplies. Love buck boost converts. Batteries may need to cover super caps to mate. Stay safe Andreas. We are back to 20 people allow at house here in Australia.

@AndreasSpiess 4 роки тому

I do not have a lot of projects where I need strong 12 volt supplies. If you have one, a server PS is a good choice. We are still at 5 persons. But traffic jams are back, which seems to be a good sign ;-)

@OndrejBrabec 4 роки тому

Great review, 👍for batteries, thank you.

@AndreasSpiess 4 роки тому

Noted!

@lemd49 4 роки тому

Perhaps you already covered it in repairs, but 1st thing always check all your VCC s when troubleshooting. I remember learning this in EE lab 1 after undoing a bunch of wire wrap connections and other things unnecessarily... Saves a lot time.

@AndreasSpiess 4 роки тому

I even start with checking ground ;-) If it is ok the chance that you mixed plus and minus is very small...

@klif_n 4 роки тому

Thank you for this. And yes please do one for battery powered projects.

@AndreasSpiess 4 роки тому

Noted!

@williamwatson1532 4 роки тому

Great video as always! Hand tip: if you have decided to use a 7805 and then find it's cooking, you can replace it with a 1-2450-TRACOPOWER which has the same pin out but will deliver 1A comfortably. Not nearly as cheap as the 780x series, but very handy on a PCB. It's a switcher so no heatsink. From memory the drop out voltage is about 1.5v, and you can use up to about 30v on the supply side.

@AndreasSpiess 4 роки тому

Thanks for the info!

@williamwatson1532 4 роки тому

@@AndreasSpiess I think the 24xx series matches the 78xx parts for voltage out. They might also be handy in battery powered designs.

@CamiloSperberg 4 роки тому

Lol I knew "The swiss guy method" as the "fingermeter", it is truly a unique sensor. Thanks for this video though! Some time ago, to avoid learning about all this and to make my life easier, I used an old PC PSU for a project which needed 12v, 5v and 3.3v, be aware though that some need a minimum voltage to operate but in my case some lamps at 12v, an rpi3 + sensors at 5v and multiple sensors at 3.3v was enough to not trigger that protection: it is also excellent for really power hungry devices as my old PSU can handle bursts of a combined 180w on the 3.3v and 5v rails and 23A on the 12v rail. That being said, unless you are building a PC, most of the time this will be overkill. As always, great video, learned a lot from it!

@AndreasSpiess 4 роки тому

You even can buy connectors to build a full-blown Bench power supply of a old PC PS. Probably the cheapest way to get power on your bench

@skewedmaker 4 роки тому

Very useful, would like to see the battery and solar videos as well. Please keep the videos coming.

@AndreasSpiess 4 роки тому

Noted!

@rickwise9910 4 роки тому

Excellent video, I'd definitely like one for batteries. As someone said, it would be nice to see something about ripple, noise, etc. Also isolation.

@AndreasSpiess 4 роки тому

There are some good videos out for ripple (EEVBlog, for example) and for safety yoou also find many videos.... And I left this link in the description: lygte-info.dk/info/ChargerIndex%20UK.html

@timfoster5043 Рік тому

Extremely helpful for this newbie!! Subscribed!

@AndreasSpiess Рік тому

Welcome aboard the channel!

@lawdeale 4 роки тому

Awesome as always Swiss Guy :D most definitely interested in a battery powered episode

@AndreasSpiess 4 роки тому

Cool, thanks

@JerryEricsson 4 роки тому

Thanks a million. I am still playing with my web radio. I recently rebuilt it, trying to use my 12 volt cell built from an old Apple Laptop battery. What used to be a very clear, wonderful sounding radio now has a horrid hum playing behind the music or talk. I hope that when you get to the battery part of this series the answer to my problem will come up. Oh my mind needs the distraction now, you see we met with the doctor Friday and were told that my good wife of 51 years has a rare version of cancer in her stomach and liver. They can't tell yet, how aggressive it is because it has been known to be nearly benine to very aggressive. Right now they put her in the mid scale. She is home from hospital right now on very strong pain meds, and going through hell. It breaks my heart to see her like this but I guess it's all part of getting old. We should be hearing from the specialist that has been assigned her case next week so we know what treatments are available, and, well, how aggressive we can expect it to be.

@AndreasSpiess 4 роки тому

I wish you a lot of luck. My wife was also extremely ill and now she is well again. I hope the same for your wife!

@jamaicansoul 4 роки тому

Thanks for this basic but important thing to think when starting the projects, many greetings from México. P.D. please go with the battery selection video :) it will be very interesting!

@AndreasSpiess 4 роки тому

You are welcome!

@ovidiurosu6632 4 роки тому

thank you, very informative. Yes, I'd like a similar one for battery powered projects :).

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@McTroyd 4 роки тому

I never knew the name of the "sophisticated Swiss guy" method! Been using that all my life. Makes things exciting, especially when I'm not looking. 😁

@AndreasSpiess 4 роки тому

If you are fast you do not need to look...

@joshuarosen6242 4 роки тому

That was useful and interesting and I'd definitely be interested in a battery edition. One type of power supply I like for small mains projects are the little potted mains to 3.3V or 5V power supplies that you can get on AliExpress for a few pounds. They are small and work well if you want to wire the power supply in permanently.

@AndreasSpiess 4 роки тому

I think I showed one in the video. I also use them sometimes.

@joshuarosen6242 4 роки тому

@@AndreasSpiess You are quite right, it was at 2:20 - I missed it first time round because I had to get my dog to stop barking at the post man (delivering a parcel from AliExpress, appropriately enough). The ones I use are much smaller than that (probably no more than a quarter of the size) and are a lot more clearly labelled but otherwise, probably very similar.

@cthree87 4 роки тому

Yes please on the battery power video! Thanks!

@AndreasSpiess 4 роки тому

Will do!

@davidfairchild1991 4 роки тому

Great video! I would love more info on batteries as well.

@AndreasSpiess 4 роки тому

Noted!

@MarcelHuguenin 4 роки тому

Hi Andreas, it was useful AND interesting ;-) Danke schön! (Note: I use the same mini switching regulators as you showed next to the TO220 one, and they can handle up to 23V input)

@AndreasSpiess 4 роки тому

You are right.

@kanapkazpasztetem 4 роки тому

Quiescent current or just in general efficiency of the PSU may not be the first thing to worry in mains powered projects but I think you could mention that we always should set ourselves a goal of creating power-efficient devices. The few more mA taken by old PSU may not make a real-world difference but it is about the mind-set 😉 I don't know what if it fits your plan for battery episode but I'd love to hear of a scenario like "battery charger -> battery -> device" so this is like "battery backuped project". Anyway, well done, looking forward to next episode 😁

@AndreasSpiess 4 роки тому

Stand-by energy is important if you sell millions of devices, I agree. Humans could save a lot of energy by not driving to the next supermarket or, even worse, to the fitness center, by staying around the house for holidays or WE, etc.

@nosafetyswitch9378 4 роки тому

Sorry but I had to stop at 2:51 and go to video 244 where you gave me a revelation and now I am trying to make my powerbank output 12v!!! I will carry on with this video later :D

@AndreasSpiess 4 роки тому

Take your time!

@ebaer008 4 роки тому

Thanks for those hints, Battery and Solarpower would be really nice...

@AndreasSpiess 4 роки тому

Noted!

@OneMarcFifty 3 роки тому

Grüezi Andreas, many thanks (again) for this video - while I “somehow” knew how to power my projects I do now have a very structured approach to it. I’d love to see the battery video - greetings ausm großen Kanton ;-)

@AndreasSpiess 3 роки тому

You are welcome. And your vote is noted.

@z.brannigan9748 4 роки тому

long awaited. thank you

@AndreasSpiess 4 роки тому

You are welcome!

@gaborungvari784 4 роки тому

very handy summary. thanks! and please prepare the battery related one:)

@AndreasSpiess 4 роки тому

Will do!

@matts2581 4 роки тому

I am very elementary to this power supply stuff and don't know a thing really. I know I need to watch what I am up to with my 3.3v and 5v sensors with my Arduino's and such - barely. But... ...a coverage on batteries would be good because with people looking for green/renewable energy resources, rechargeable battery power supplies might be of interest to some. Such very thorough work as always Andreas - thank you.

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@jcasistemas 4 роки тому

Excellent video !!! This ... and the ones I have been able to see on your channel. Glad to know you're in good health. :) :) :) :) And it would be very educational to see a next video about battery powered devices. Successes !!! :)

@AndreasSpiess 4 роки тому

We only had 10 infected yesterday in Switzerland. So it is easy to stay healthy ;-)

@Massive1986Cava 3 роки тому

This is the video i was looking for! Thanks!

@Massive1986Cava 3 роки тому

Just one questio: Do all AC-DC adapter (with USB output) have a regulated and stable output voltage? If it's not, how can i ensure if i need some regolation after my adapter? In my case i need to power and arduino with a couple relay and a SIM module (which require up to 2A during network registration). Thaks a lot!

@AndreasSpiess 3 роки тому

Just consult the datasheet (or the marking on the device) and you should see if they are regulated. USB connectors always have regulated voltages.

@Massive1986Cava 3 роки тому

@@AndreasSpiess thanks a lot!

@EvertZwevert 4 роки тому

Sunday morning: sun, croissant, coffee & Andreas answering my project questions. A good way to start the day. Thanks andreas ! Ps. From across the room my gf says you sound way younger.

@AndreasSpiess 4 роки тому

Thank you for the compliment! So the investment in a good microphone was worth the money ;-)

@brunner318 4 роки тому

Please do a video on battery supplys too, I really liked this one!

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@Rob2 4 роки тому

I should say my preference in case they are both possible has completely shifted from the analog regulator to the switching regulator. So in a case like your keyer, while in many old projects I have used 78xx regulators, today I would immediately go for the switching buck converter. This is mainly because the complexity that was always around switching regulators (how to find suitable components and make it work OK) has been completely taken away by those small ready-made modules like you showed. I just get one of those Chinese modules I order 10 at a time from AliExpress both for fixed and variable voltages and use them without any problem... and no more heat issues. In case I quickly need a supply and have only larger voltage supplies I often take such a module, solder standard black/red supply cable to it and then put a length of heatshrink tubing around it. It can then be used between the lab supply or a wallwart and the project and there is no risk of shortcircuit when it is on the table or somewhere in a corner of the case.

@AndreasSpiess 4 роки тому

You are right. I also like these small boards and have quite a few laying around. But maybe I am a little old-fashioned ;-)

@SyberPrepper 4 роки тому

Very helpful. Thank you.

@AndreasSpiess 4 роки тому

You're welcome!

@renpytom 4 роки тому

Andreas, when it comes to USB Power Delivery, consider taking a look at the ZY12PDN. These use a button to select between 5, 9, 12, 15, and 20v. You can hold the button down when plugging it in to select the voltage it powers up at, which is really convenient.

@AndreasSpiess 4 роки тому

I have soch a PCB. Would you like to push buttons every time you start your project?

@renpytom 4 роки тому

@@AndreasSpiess No, but if you hold down the button when you first plug it in, it will start blinking. Pick the voltage, then long-press. It saves it to internal flash, so the next time it comes in, it has the right voltage. It's not as obvious as it should be.

@AndreasSpiess 4 роки тому

Thank you for the tip!

@juletartempion 4 роки тому

yes yes yes, please do a video about battery powering devices. I always have difficulties to find good booster, and if I should try to get an all-in-one board (charger & battery protection &booster), or if it is better to have everything separated. Also interesting would be a discussion in very low power devices, i.e. I have an arduino and RFM22 sending data every 5 minutes working on a single AA battery for 4 to 5 years!

@AndreasSpiess 4 роки тому

Noted!

@christopherguy1217 4 роки тому

A very useful video as always. I would like to see a video for batteries.

@AndreasSpiess 4 роки тому

Noted. Thanks!

@MaltWhiskey 4 роки тому

Again another great video :) I’m building a large 16^3 led cube with pl9823 leds. If you calculate the power i need -> 60mA x 4096 x 5v = 1200 watt... So i bought 4 60A, 5V powersupplies, thick wire for 15A, per 256 leds. The proof of concept works. But i also want a kind of standby mode. Leds that are powered, but off, use arround 1mA... Thats 20 watt when off.... So how i was thinking using mosfets to turn all power off (need to switch the 5v, not ground, according to adafruit guide) but with 240A total those mosfet resistances RDSon will also have a huge impact. There is some overlap with battery powered project here (minimize quiescence current). Always something to learn... I’ll think i’ll go read in my electrical engineering book and figure out what to do with those huge current, but watching your youtube video’s is so much more fun ;-)

@AndreasSpiess 4 роки тому

You probably need one FET per power line. Then currents are a little lower...

@bensorensen8905 4 роки тому

I fully agree with Daily Cake Slice. Among the Development Board drawings I sent you, there is a new idea for battery power or main power. For batteries you can use a good size 6V, charged by solar and then go to MCP 73123 charger to a 3.3V Lifepo4 Battery to run the ESP WiFi. It hasn't been tested.

@AndreasSpiess 4 роки тому

There are only a few chargers which also handle LiFePo. If I remember right, the TP5000 uses the MCP 73123. And you are right, LiFePos are a good choice for ESP projects...

@jmeuf 4 роки тому

Very useful! Please cover the battery case. Thank you.

@AndreasSpiess 4 роки тому

Noted!

@sumitkar6682 4 роки тому

Very useful video.. waiting for the video on batteries.

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@tonybell1597 4 роки тому

Thanks Andreas, yes, battery supplies next....

@AndreasSpiess 4 роки тому

Noted!

@theworldisbetternow 4 роки тому

One remark concerning the 5V on the wemos. There is a diode between the USB and the 5V pin on the linear regulator. This diode lowers the voltage by 0,5V or more. Sometimes (if you power other modules using the 5V pin on the wemos) this might play a role. In the end it is better to connect power direct to the 5V pin.

@AndreasSpiess 4 роки тому

Good point. Thanks for clarification

@ahmedawny7236 4 роки тому

Thanksa lot for the video. If possible please do one on battery powered devices as well

@AndreasSpiess 4 роки тому

Noted!

@mtayseer82 4 роки тому

Very nice videos. Please make a video about batteries, specially about boosting the voltage

@AndreasSpiess 4 роки тому

Noted.

@phillipneal8194 4 роки тому

Yes. Please do a battery video. I make esp32 /arduino robots and need to supply 3.3 for the mpu and 6-12 volts for the motors.

@AndreasSpiess 4 роки тому

Thank you for your feedback!

@slewis2u 3 роки тому

Andreas, I agree with the compliments and appreciation expressed below. Also, when you discuss battery power options in a planned video, would you consider adding ideas for monitoring the battery voltage and using LoRa to send periodic measurements to the cloud? I want to show trend graphs and send low batt alerts for remote AREDN radio sites on 12v solar systems. Many thanks!!!

@AndreasSpiess 3 роки тому

Usually you can build your particular project with parts of my videos...

@Kevin192291 4 роки тому

I would really really love to hear about outside battery powered projects!!!!!

@AndreasSpiess 4 роки тому

Noted!

@belenhedderich3330 4 роки тому

Dear Andreas I'm happy to see that you are somehow using my parametric box designs to make your boxes I might be wrong though... but if I helped YOU I'm more than happy to help an hero of mine! LOL. Would like to love one of batteries and solar power!

@AndreasSpiess 4 роки тому

I use my own design in Fusion360 (I showed it once in a video). I like this aproache because I alsways need some special cases...

@enochfuryan9094 4 роки тому

Great video. Please kindly make one about Battery Supplies for makers.

@AndreasSpiess 4 роки тому

Noted

@OsoPolarClone 4 роки тому

A battery power supply video would be great along with another decision tree. Thanks

@AndreasSpiess 4 роки тому

Noted!

@TheKefas95 4 роки тому

You should see Great Scott video about usb c. He explained how to create all available voltages in power delivery protocol.

@AndreasSpiess 4 роки тому

I know that video and I have such boards. But I do not want to press 3 times everytime when I power my board...

@electronic7979 4 роки тому

Helpful video 👍 I liked it

@AndreasSpiess 4 роки тому

Thanks for liking

@eduardovillar2211 4 роки тому

Hello Andreas, sure we are interested in power supply with batteries. As you comment in the video please consider also to investigate how to avoid noises on PIR ans radar sensors with our loved esp modules. Battery powered with mqtt could be a great intrusion alarm system but the false positive now makes it poor realistic with the ESP modules.

@AndreasSpiess 4 роки тому

I made some remarks about the topic in one of my last videos. I think it was a mailbag.

@KK-fh1ds 4 роки тому

This helped sooo much

@AndreasSpiess 4 роки тому

Glad you like it!

@tomnoyb8301 4 роки тому

Battery apps usually push the size/weight envelope? Almost always multi-rail boost? Inevitably requiring custom board(s)? Layouts become sensitive? Switching frequencies sometimes important? Surely there are tricks and maybe preferred components to accomplish? Maybe a graph/chart or two of operating space vs solution(s)? Especially the ultra-low-power end? A magnetometer measuring once per second or lidar measuring once per ten-minutes, for example?

@AndreasSpiess 4 роки тому

This video was focused on mains powered devices. And many of your questions are far too special for the normal viewer, I think.

@tomnoyb8301 4 роки тому

@@AndreasSpiess - You asked what we wanted to hear about in your upcoming battery video? Just my two-cents that it skew towards ultra-low-power vs C or D-cell applications? Where small is as important as efficiency? Thanks for responding.

@AndreasSpiess 4 роки тому

Aha. Now I understand. Thanks!

@miketaylor253 4 роки тому

Battery supplies next and maybe the "maths" to calculate the runtime, especially when the load varies. Thank you for another excellent video.

@AndreasSpiess 4 роки тому

I made such a "math" video long time ago for the ESP8266...

@whitefields5595 4 роки тому

Andreas, A useful follow-up video should be on smoothing, de-coupling, ripple, noise , etc. Are there some "Swiss Guy" solutions here too?

@AndreasSpiess 4 роки тому

This is a rather special area, maybe not too interesting for many subscribers :-(

@WurstPeterl 4 роки тому

whitefields5595 EEVBlog has good videos for that.

@WurstPeterl 4 роки тому

Andreas Spiess I would still love to see your video on it. Your videos are always very straightforward without much laber rhabarber.

@jost459 4 роки тому

@@AndreasSpiess Haha, you are right. Also EMC is a big problem for hobbyist to solve. I will say impossible!

@jkd2377 4 роки тому

I'm definitely interested in those topics, especially if illuminated the "Swiss Guy" way!

@LostDeadSoul 4 роки тому

Well. You could work around having to drop down a high voltage at high currents. If you buck regulate down to 1 volt over what you are requiring and then linearly regulate from there. Thus the voltage dropped by the linear regulator is small compared to not having the buck regulator and this makes the setup much more stable and much more efficient.

@AndreasSpiess 4 роки тому

Then I do not see the need for a linear regulator unless you have a special case. It will not kill the noise, unfortunately :-(

@LostDeadSoul 4 роки тому

@@AndreasSpiess I may have been misinformed, but i saw Dave Jones review a linearly regulated buck power supply. it was smart

@Kosmonooit 4 роки тому

Meanwell makes a great range of Mains PSU's and DC to DC converters

@AndreasSpiess 4 роки тому

You are right.

@calvinbrowne2126 4 роки тому

Thanks! Useful. I'm interested in the battery side of things. Particularly when it comes to step up (and step down) converters. Some of my access points, for example, run off 19.5v DC and I'm trying to eliminate the cross conversations of a traditional UPS, which I suspect to be highly wasteful. I want to think about direct lead acid (or agm or calcium) connections. I'm particularly interested in protecting against voltage spikes etc. that my be caused as a battery charger kicks in, for example..

@AndreasSpiess 4 роки тому

This is probably a special case. But I will cover boost converters.

@barrydonaldson 4 роки тому

Excellent! Another one for batteries please...

@AndreasSpiess 4 роки тому

Noted!

@Serpent10i 4 роки тому

I would love to see the battery (and solar) powering solutions!

@AndreasSpiess 4 роки тому

Noted!

@darkstar2111 4 роки тому

Yes, please create either battery and solar powered projects videos. Kind regards ;)

@AndreasSpiess 4 роки тому

Thank you for the feedback!

@Stoneman06660 3 роки тому

A current project I'm working on requires 5 V to power the MCU and various software controlled outputs via USB as well as switching mains on and off via an isolated relay board. I may also need to add some fans for air circulation, also software controlled, which will need a 12 V supply. This video couldn't have come at a better time. Current plan is to hack a socket mount power adapter with built in USB outputs, add a fused power socket with switch, and mount a 240 V socket with switch on the back so mains devices don't need to be butchered to make them compatible. Will be able to add a ground connection too, something that is frequently absent in cheap products even if it would be desirable to have such a thing installed. And yes, a battery version would be grand too! Many thanks.

@AndreasSpiess 3 роки тому

Nice project you have!