Thank you for doing this video as it's extremely useful for anyone with battery powered projects. Recommendation: improve this idea in a part 2. Drawback to this method is that it constantly draws a tiny amount of current. I think there are ways around this using PNP and NPN transistors. A demonstration of this would be a big help to me and others.
@wreckless_-jl6uu
5 жыл бұрын
This is exactly what I’m working on, but I’m making it complicated for myself I guess.. using shift registers.. and wanting to monitor any series batteries.. such as a 4s or 7s and scrolling the voltage of each series pack.. then scrolling the display and having 10segment LEDs on a board.. I’m still relatively new btw with all this and c++ too.. 🤪👊
@IvanColmenero
5 жыл бұрын
Very nice proyect! Easy to understand, thanks to Professor Paul. Thank you for another class! I´m wait for another Multimiter review and teardown...
@markgreco1962
5 жыл бұрын
I would love to see this integrated into a 18652 3s bms system. Like a high class battery bank. Thanks Paul
@alanbacknd3120
5 жыл бұрын
Glad to see more arduino stuff I missed it. You do such a good job teaching.
@mikeoliver3254
5 жыл бұрын
I had know idea you could read a voltage higher than 5volts on an arduino. Now I have to get one out and start playing. Thinking about it now it makes sense, I guess it never occurred to me to try it. Great video Paul.
@learnelectronics
5 жыл бұрын
Yep, the voltage divider let's you read higher voltages. Still no real way to get negative voltages though.
@mikeoliver3254
5 жыл бұрын
Oh it makes perfect sense I guess I just had a 5v only blind spot, but that’s part of why I watch your channel, you are a great teacher so you help me see the stuff I am missing. BTW I got my 555 shirt today and I love it.
@MalagasOnFire
5 жыл бұрын
it could be useful using a arduino nano , low profile, with double crimped connectors, one going to circuit to measure and stick with double sided tape onto the 12V SLAB the other to the Device Under test.
@melplishka5978
2 жыл бұрын
Nice one Paul.
@bblod4896
5 жыл бұрын
Okay, you gave me an idea. I'll send you the details later, busy today and tomorrow. Cheers!
@georgechambers3197
5 жыл бұрын
Wow, two days of Arduino. Happy days are here again. 😁 Paul, it really sucks about the Pittsburgh Quarterback. I hope he's back soon. What size wire are you using for your jumper wires? Thanks for more Arduino video's!
@learnelectronics
5 жыл бұрын
Its 22 ga solid core. I get a box of it thst has like 7 different colors. Rudolf was back in the locker room yesterday. He will be out a couple of weeks but should be ok.
@georgechambers3197
5 жыл бұрын
Thanks Paul.
@pulesjet
5 жыл бұрын
I could use this on my Solar Wind Power Wall project with a few little changes Even I should be able to accomplish. Cool. Need to expand the Voltages to cover up to 30V. Have it trip a Relay to turn on a Dump Load for the Wind Turbine.
@naquiyuddinhusin3146
3 жыл бұрын
how to change the voltage in program if i change 7.4v or 11.3v
@MCsCreations
5 жыл бұрын
Really interesting project, dude! Thanks a lot! 😃
@whitehoose
5 жыл бұрын
I'm normally a numbers guy - but I'm also a sucker for a bar indicator. Nice, simple and easy to read, what more is there? I'm almost tempted with the little display ... but nahhh! I have other stuff to spend my pocket money on just now, trying to increase the range of a sonoff switch (esp 8266) or make it see round corners. How hard can it be?
@learnelectronics
5 жыл бұрын
Only as hard as you make it.
@whitehoose
5 жыл бұрын
@@learnelectronics Oh dear - that hard?
@whitehoose
5 жыл бұрын
Update : Antennae came today, After reading half the internet, frightening just how much conflicting advice is given. The answer is to keep it simple and use only one antennae, positioning the aerial is important, not a miracle cure (you can't detect what's not there) - but a good enough fix for my need.
@MikesAllotment
5 жыл бұрын
I'm not sure I understand the 'logic' of using a 100K fixed resistor in the voltage divider? Given a 12v input, that 100K fixed resistor + 10K variable resistor, ohms law would lead to a tiny 0.1mA current, and a massive voltage drop of 10.9v across the fixed 100K resistor - meaning only a max of ~1v on analog pin A0 when the input voltage is 12v. Hence your code is taking that voltage reading and immediately multiplying it by 5 in order to get it to a 'sensible' value. Surely it would be better to aim for a max 5v on A1 when input voltage is max 12.7v. So a voltage drop of 7.7v across the first resistor and a voltage drop of 5v across the second. Assuming a sensible 1mA current flow, ohms law would suggest 7.7K for the first resistor and 5K for the second (or e.g 7.5K and 4.7K using standard resistor values). Why did you go for such a high 100K resistor, leading to such a low current and low max voltage on the analog pin? Or am I missing something fundamental?
@MalagasOnFire
5 жыл бұрын
See page 212 of atmega 328 datahseet, section 23.6.1 Analog Input Circuitry , check the input impedance ... Also look the page 265 - 28.9ADC Characteristics , Analog input resistance => 100MOhm
@paulramasco6769
5 жыл бұрын
This was awesome, thank you for sharing.
@flemmingchristiansen2462
5 жыл бұрын
Cute little project Shouldn't there be some kind of load?
@learnelectronics
5 жыл бұрын
You use this in parallel with whatever you are using the battery for.
@wreckless_-jl6uu
5 жыл бұрын
The load in this scenario is the 10k pot it’s basically a variable resistor which is a load in a sense..
@digdigger4277
5 жыл бұрын
anyone know how to fix a black screen esp8266?
@RespawnRestricted
5 жыл бұрын
Great vid.. do you have a email or something were I could ask you something? Don't want to go filling up the whole comment section comment section LOl
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