UVLO RevC
author: OnyxRobots
2 layer board of 2.00 x 1.50 inches (50.8 x 38.1 mm)
Uploaded:
March 24, 2014
Shared:
August 23, 2014
Total Price:
$15.00
LiPo low-voltage cut-off 2014-03-24
After destroying a LiPo battery when forgetting to turn off a LiPo powered Raspberry Pi device, I built this circuit. It features a soft-power-on switch based on a P-channel MOSFET, and a space for an ATTiny85 to monitor voltage and turn off when it’s too low.
I have built this and use it, and I additionally talk to the ATTiny85 using the SPI in the Raspberry Pi (without chip select) to report voltage to the host, and do soft-power-off on demand.
Firmware for the ATTiny85 obviously is important for this project to work right!
LiPo low-voltage cut-off 2014-03-24
After destroying a LiPo battery when forgetting to turn off a LiPo powered Raspberry Pi device, I built this circuit. It features a soft-power-on switch based on a P-channel MOSFET, and a space for an ATTiny85 to monitor voltage and turn off when it’s too low.
I have built this and use it, and I additionally talk to the ATTiny85 using the SPI in the Raspberry Pi (without chip select) to report voltage to the host, and do soft-power-off on demand.
Firmware for the ATTiny85 obviously is important for this project to work right!
