Guru
Joined: 12/08/2011
Location: AustraliaPosts: 322
| Posted: 03:44am 12 Jan 2024 |
Hi All
Finished the board and tested, with great results.
2mA resolution and holding steady within 4 mA.
The board takes about 10 minutes to settle on temperature and from then on
it seems not to vary by more then 4mA.
Made one mistake by forgetting to join the Pico Gnd to the Battery Negative, which meant each time I unplugged the usb cable the Pico died.A sharp eye will pick the jumper.
Also the Power pack I was using to test it on my desk is above ground, which meant the
counts were unstable until I jumpered it to ground. In the camper that won't happen as it is being powered by the Lipo4 battery.
Soldering of the Shunt regulators is not pretty as I had to pump a lot of heat into it,
so stopped as soon as I had a good connection.
