Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water.
New to EnviroDIY? Start here

Reply To: Innacurate LiPo battery voltage data

Home Forums Mayfly Data Logger Innacurate LiPo battery voltage data Reply To: Innacurate LiPo battery voltage data

Shannon Hicks

    Yes, this is a known issue that I’ve seen with only a very few boards recently where we see those exact same incorrect voltage readings around the Q1 mosfet. I haven’t tried replacing parts to see whether it’s the mosfet or the D3 diode, but it’s definitely either one of those, or possibly both of them. I’ll see if I can experiment with some bad board this weekend and find the culprit. I’ve never been able to purposely cause a failure even though I’ve tried really hard to repeat the conditions and stress out the components with various hardware and power configurations. Were you powering the board from the microUSB port, the FTDI header, a LiPo battery, or a combination of those? And did you have any telemetry (radio, wifi, cellular) xbee modules installed at the time?