RUMBA, high-quality and durable open source control electronics for 3D printers. Processes voltages from 12V to 35V. Up to 6 motors can be controlled. Optional: LCD-Display/Controller or Full Graphic LCD-Display/Controller Scope of delivery - Rumba electronics max. 35V - 5x Stepstick A4988 - 5x radiators incl. adhesive - 1x SD card reader - fan Advantages - high-quality and durable components - Internal voltage control for connecting 12V fan, light, ... also when using e.g. 24V heatbed - 5x temperature ADC connectors, >e.g. 3x extruder- + 1x heatbed- + 1x enclosure-thermistor - 6x endstop connectors with power supply a) Xmin/Xmax/Ymin/Ymax/Zmin/Zmax b) usable for nutzbar mechanical, optical and, Hall-, ... endstops. - Arduino 2560-R3 compatible (Sprinter, Repetier, Marlin) - ATmega16U2 (with extended firmware) High-Speed USB serial connection (up to 2MBit)- full JTAG support - Voltages and all unused Pins are reachable via the "EXP-3 feature connector" Please find further information and the circuit diagram here: reprap.org.