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Forum Index : Microcontroller and PC projects : INA-219 current/voltage sensor on I2C
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| DaveJacko Regular Member  Joined: 25/07/2019 Location: United KingdomPosts: 76 |
What I'm playing with this week.. INA219 I2C current and voltage sensor. 1st project, 18650 Battery Analyser. Looking good, quite easy to use. prototype uses a 4700 uF as the battery, With an LED as the load. Shortens the charge/discharge cycle time somewhat. Waiting for the power resistors to arrive for the real test. It Will be interesting to find out the real mAh of the 4800 mAh Bangwell(TM) 18650 ! I'll let you know. A more serious endeavour, a Lead-Acid Solar charger. I bought one online for little money, great spec in theory. Afraid the battery voltage control was 0.3 volts out. Would kill your Lead-Acid prematurely. A much better job could be done with Pico+INA219, maybe with a JDY-41 (was surprised not to find anything like that already on this site.) Anyone interested ?? |
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| lizby Guru  Joined: 17/05/2016 Location: United StatesPosts: 3150 |
Fruitoftheshed: INA219 I'm using the INA226 with Annex, monitoring some miniature 18V 1A solar panels to see what wintertime shading is like in the hopes of someday mounting real panels. Here's a graph:  I am not confident that I have the calibration correct, but for my purposes, it doesn't matter--the comparison over the day is what is important for this exercise. Write-up here (My post followed by a long OT digression on a Stirling engine heat pump perpetual motion device.) A year ago I lamented that nothing like this was available with wifi (from China), but was sure than in another year there would be. I was wrong. ~ Edited 2024-10-29 10:24 by lizby PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6091 |
I use the INA219 and also the 3 channel INA3221. I like the 3221 but there is a bit of interaction between the channels. Yhat is probably due to my layoUt. Jim VK7JH MMedit MMBasic Help |
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