The register, adder, logic function, and multiplex boards are the heart of the build with an additional two custom boards for visualization (using an Arduino ... more complete relay-based CPU ...

Expect to do a lot of drilling. The electronics uses an Arduino, a Bluetooth board, and some relays (including a solid state relay). The finished system can brew between 5 and 15 gallons of beer ...

But that doesn’t change the fact that these tiny boards can enhance the functionality of your Arduino-based tinkering ... to ...