From there he needed to control the solenoid valves on the system and grabbed three relay shields from Seeed Studios for this purpose.

A solenoid valve controls the flow, and a lot of vinyl tubing hooks it all together. There is an HC/06 Bluetooth module with an app to control the device from a phone, though while he’s posted ...

Man, do nerds love their coffee. How else do you explain that a robot-controlled espresso machine blew through its Kickstarter target by a crazy 16X? Coffee-loving engineers Gleb Polyakov and Igor ...