
[Ken Olsen] needed a bunch of analog inputs for his model railroad project. He wanted to use the Raspberry Pi board, but alas there are no analog inputs available on the GPIO header. But there is SPI. So he used an online service to design his on Analog input expansion boards. He mentions that Eagle can be a bit of a pain to work with. For this project he decided to give circuits.io a try. This … [Read more...]





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