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 ...

Built as an educational demonstrator, this is a complete arithmetic-logic unit (ALU) using discrete relays — and not ... for visualization (using an Arduino for convenience) and IO forming ...

Finally, your Arduino toolkit will be incomplete if you ... it’s a good idea to grab a couple of motors and relay modules for ...