Hi,
I'm new to Arduino and I have a Nano 33 IoT I'd like to use to switch on a Raspberry Pi 4 B. As I understand it, since the Nano 33 outputs 3.3V and the Pi takes 5V, controlling power directly is a no-go. Both devices will be powered via wall outlet, so absolute minimization of power consumption is not an issue.
Googling and reading this forum led me to think that a 3.3V relay would suit my purposes but I have questions:
- Am I going to run into issues controlling a 5V device with a 3.3V relay?
- How do I pick a reliable relay? Seems like there's a lot on Amazon.
- (Maybe beyond the scope of an Arduino forum) I intend to software shutdown the Pi when not in use. If it's shutdown via software, it requires a power cycle to reboot. The easiest solution in my mind is when the Arduino is triggered to power on the Pi, if it's already high, switch the relay off and then back on after a second or two. Is there a better way to do this? Maybe using something other than a relay?
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