For some projectes with rapsberry and the smaller arduinos I need to switch some relays. Because of the GPIO outputlevel (3,3V) its hard to find some relays that are able to switch larger loads and can operated directly with the given 3,3 volts.
So i decided to build my own relay-board. The 5Channel one i build here is around 10€ for the pieces. In addition you only need a soldering iron, solder and some tools to cut the wires and bend the legs of the components.
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