See thread Open Hardware HydraBus Shield / Breakout Board for ESP31 (ESP32 Beta) module
http://esp32.com/viewtopic.php?f=2&t=68
This design is CC BY...
An emergency food button. Like the Amazon Dash button, but it orders food. Comes with an "enable" jumper to keep it from ordering things when you don'...
Extend your RepRap Duet Board with this to drive up to 4 stepper drives. You can connect Polulu Driver Modules to the board to drive the stepper Infor...
