Smart Home Automation Forum

Hello

Is it possible to power (VCC) from a GPIO output? I need to be able to reset a DS18B20 by turning off the VCC to the sensor as they get out of timing sync often and only are able to re-sync from a power cycle - not from a node reset.

Whats the max current the GPIO as an output that ic an supply

GPIO can't use as a power supply VCC.

A safer approach is to use a P-channel MOSFET or an N-MOSFET low-side switch to control the sensor’s VCC, or even a small transistor. This way, your GPIO just controls the gate/base and the sensor gets proper power for resets.