Generation 7 Electronics

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Generation 7 Electronics

Release status: Experimental

Gen7 Layout.png
Generation 7 Electronics
GPL v2
CAD Models
External Link

This is a complete set of electronics loosely based on the (a bit unfortunately named) Gen2OnABoard.

Design Goals

  • PCB easily to manufacture on a RepRap.
  • All parts on one board. Except for the Opto Endstops, of course.
  • Enough components to run a Mendel or Huxley with extruder and heated bed.
  • Easy to set up. For example, this would include an USB port.
  • Well available and cheap parts.
  • Based on the ATmega644.


  • Single board solution.
  • Pololu stepper drivers, exchangeable.
  • 4x stepper motor drivers with 1/16 microstepping.
  • TODO: on-board USB-RS232 converter.
  • Integrated hardware for driving one extruder (stepper, heater and thermistor).
  • Integrated hardware for a heated bed (heater, thermistor).
  • Integrated hardware for driving a fan.
  • Ready to be hooked up on a generic PC power supply unit (PSU).
  • Use of standard connectors.
  • Debug LEDs for power, Fan and both heater outputs.
  • Can turn PSU on and off in software.
  • Reset button.


  • Dimensions about 100 x 120 mm.
  • Input voltage through a 20-pin PC PSU.
  • Processor: ATmega644 (Atmel Corp.)

More to be defined.