Quick question: in which version of the Peaks hardware were the null voltage trimpots replaced with firmware calibration? It looks like v3.0 of the PCB files, which appeared in late 2015, but support for calibration didn’t appear in the firmware source code until about August 2016 - is that correct? Also, the firmware calibration procedure doesn’t seem to be documented anywhere (although it can be inferred from the source code).
The context is that some people have installed Dead Man’s Catch and fhave ound that the null voltage is no longer zero volts (or slightly negative) as it should be. If they have a post-trimpot version of Peaks, then that isn’t surprising, since Dead Man’s Catch doesn’t include any of the August 2016 firmware calibration code. I wasn’t aware that it had been released (maybe GitHub sent me a message about it, but if so, I must have overlooked it).