How to power an Arduino with the output pin from another Arduino

Using Arduino Microcontrollers
1

Hello all. I have researched this a little bit but I saw a few different solutions. One is use a transistor the other is a relay. What would be the best way to do that without damaging it. My code from one Arduino needs to turn on a second one for a few different reasons. Does anyone know the best way to do this or have any online examples that you know of thanks for any tips.

2

There are several ways to solve this issue. Can you explain what

are?

3

You haven't mentioned how the two devices signals are connected, or if they are. You can't just switch power alone, because of parasitic powering through the I/O pins.

4

You can use a simple driver and relay to switch the 2nd Arduino
https://www.electroschematics.com/arduino-control-relay/

1 Like
5

thanks for the tip

6

You're welcome.

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