mawoodmain/esp-powermonitor

esp-powermonitor's Issues

Optional battery interface

The original intended IC the XC6806 has a tricking footprint that I have foolishly placed passive components too close to making it extremely difficult to rework into place. The design will be adjusted in future issues to use a part which can be JLCPCB assembled to remove the need to manually rework the IC on.

ESP spontaniously broken on USB insertion

After many cycles of usb insertion and removal the ESP randomly died, no particular cause has been accreditited to this but ESD is suspected, to resolve this on first issues PCBs a USB6B1 IC can be reworked onto the USB and 5V lines. If this occurs again, other possible causes will be investigated

AC input not functioning as expected

On initial bring up the AC voltage input was clipping on the internal clamping diodes, the scaling is incorrect.

Circuit tweaked and resigned in circuitjs, live simulation can be found here:
https://tinyurl.com/yjgqgnyt

In terms of rework to make the current board servicable,

1. Remove R24
2. Fit a THT 470Ohm resistor from the non gnd side of R24's footprint to pin 2 of U5

Voltage reference voltage is incorrect

By mistake the board was designed and assembled with a CJ432 ranther then the CJ431 originally intended, to resolve this the lower side of the divider can be removed (R14). On future hardware issues this will be configured using a NO jumper