dc-power-board

9-36V DC input 5.1V/5A output board for Raspberry Pi

Features

• 9-36V DC input
• 5.1V/5A output(sufficient to power Raspberry Pi5)
• Reverse polarity protection
• INA226 current, voltage and power monitor
• EEPROM for board identification

EEPROM

eep file preparation

eepmake ./dc_power_board_v1_eeprom.txt dc_power_board_v1.eep

EEPROM flashing

Short TP1 and TP2 or short R24 to disable EEPROM write protection.
Run: sudo eepflash.sh -w -f=dc_power_board_v1.eep -t=24c32 -a=53

Device tree overlay

Device tree overlay compilation

dtc -@ -Hepapr -I dts -O dtb -o dc-power-board-v1.dtbo dc-power-board-v1.dts

dtbo installation

Copy dc-power-board-v1.dtbo to the /boot/overlays/ directory.

Power monitor usage

Get current in mA

cat /sys/devices/platform/soc/fe804000.i2c/i2c-1/1-0045/hwmon/hwmon2/curr1_input

Get voltage in mV

cat /sys/devices/platform/soc/fe804000.i2c/i2c-1/1-0045/hwmon/hwmon2/in1_input

Get power in mW

cat /sys/devices/platform/soc/fe804000.i2c/i2c-1/1-0045/hwmon/hwmon2/power1_input