One of the most prominent missing features of the Raspberry Pi is the ability to completely switch off the power. The only way to turn off your Pi is ..
This board is equipped with two indepentdantly controllable relay's with one make-and-brake contact each, which are controllable over an USB interface..
This circuit board enables you to switch the three power rails to a connected SATA device. All three voltages (3,3V , 5V and 12V) can be turned on and..