Help needed: Using GPIO to switch off amplifier circuit - Raspberry Pi Forums

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i'm new creating-a-hardware-project-from-scratch aspect of pi i'm quite excited prospect of building son think he'll love playing (involving buttons, sounds , flashing lights - what's not love?!)

in respect of sound, planning on using speaker this want that's small compared powered usb options on amazon. i'm guessing pi's 3.5mm output not powerful enough drive speaker i'd need amplifier. this seems work.

want project portable planning on running pi off portable power supply (haven't chosen 1 yet). understand, thought amplifier needs 2.7-5.5v can't power gpio pins still hope able use same portable power supply.

save power i'd therefore able switch amp on when need play sounds , i'm not sure how i'd that. i.e. if have totally separate circuit of power supply , amp, there simple way of using gpio pin switch circuit on , off? saw this on wiki i'm not sure how translates connections i'd need make e.g. 0v ground on pi or -ve part of amplifier's power connections (or both of these)?

sorry that's such long winded post it, likely, simple question! guidance appreciated

to moderators reading this: please feel free move post different sub-forum if think best suited elsewhere.


raspberrypi



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