May 2014

Turning USB Devices On and Off with a Relay Using Raspberry Pi

Raspberry-Pi
2014-05-31 03:29 (11 years ago)

I wanted to use external speakers to play music with my Raspberry Pi, but I thought it would be a waste of energy to keep the speakers powered on all the time. So, I decided to create a system that turns the power on only when needed. You can easily achieve this with a single relay. The relay is controlled by the GPIO. Wiring Diagram

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