Main > Raspberry Pi & Dev Board
R-Pi SNES retro console project
Slippyblade:
Not entirely sure, I'm thinking that the Mausberry switch would see it as a power cycle signal and start the shutdown. If it is the same internal circuit I've seen elsewhere it uses a capacitor as a timer to power down...
DaOld Man:
But unless there is a power backup, such as a rechargeable battery or a pretty big capacitor, when the incoming power fails I wouldn't think the circuit would have time to properly shutdown the RPi.
Slippyblade:
There is that. Hmm... I wonder if I could got an old cordless phone with battery and charge circuit. Put that inline with the power switch. Have the Pi pull from the batter all the time, but have the charger topping the battery at all times.
DaOld Man:
That might work. Also the PiGrrl (a pi in a 3d printed Gameboy case), uses a 3.3 volt battery and a circuit to step it up to 5 volts, and I think the circuit charges the battery when plugged in also. (If I am understanding correctly).
https://learn.adafruit.com/pigrrl-raspberry-pi-gameboy/overview
That could be the way to go to, however I was thinking a big capacitor that can power the pi long enough to shut down properly.
Maybe when my mauseberry circuit gets here I can experiment with it.
I think I read somewhere that just cutting the power to the pi can corrupt the sd card. Am I out in the weeds on this?
Slippyblade:
Well, arbitrarily cutting power can corrupt ANY OS. Even the Windows/OSX/Linux computer you are using right now. Yanking power from any comp is bad ju-ju. :)
It's very possible, but also not extremely likely.
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