I have Kuman boards (with soldering holes by the headers). Remote location. 12v 2000 mA battery pack with a buck converter to 5v.
When run through the barrel connector (voltage regulator) the project stops operating (yellow leds on board flash). When connected to Vin/Gnd project runs for days from same source. So far has run ten days.
Question: Is using Vin bypassing the voltage regulator? If so, as the unattended battery discharges, will the board be damaged, or will it just shut down?
While I'm writing, with the same brand of board I initially plugged the 12v battery pack into the barrel jack. Seems to have blown up the board. Red leds flash, nothing works. Project has an Adafruit paperwhite display, a LoRa radio and two temperature probes. Measured power draw is < 60 mA.
Do you recommend I try again with 12v through the barrel jack on a new Kuman board, or stick with the buck connector providing 5v through Vin? I cannot keep it going long with 5v through the barrel jack.
Thank you.