I have a Raspberry Pie 2 that I want to use to light LEDs behind my monitor if I should be sleeping instead of staying on the Internet. For this I will use a autostarting python script, but I don't know how to handle the power off, as I don't want the LEDs to be lit if my PC is turned off. I thought about the following possible solutions and would like to hear what you think of them, or if you have any better ideas.
- I could just power the RP over one USB port from the PC as I have a switchable power outlet, but then I would turn it off each time without propper power down.
- I could add a big capacitor, and sense the power loss to use the remaining charge to power it down properly, like a little UPS, but this could be a little bit overengineered.
- I could ping my PC, and if I cannot reach it it is off, so the LEDs will be also switched off. This setup could also be used to get this Pihole adblocker running.
What do you think?