turning on and off an arduino with another arduino

Hi there

I was curious if anybody happened to know what the best way to control on/off for an arduino from another arduino? I tried using relays but its abit too bulky for my project. Really appreciate if there was someone who could help me out with this and provide some recommendations! Thanks so much all!


Lots of suggestions here

Alternatively you could just sleep the arduino you want "off" and use an interrupt pin controlled from the other arduino to wake it up.

Ohmygod youre a life saver!! The sleep mode is perfect, thank you so much!!

My pleasure. Dont forget to change the topic title & add "SOLVED"