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RAMBo Electronics Controller V1.3

RAMBo Electronics Controller V1.3

Regular price $170.00 Sale

The RAMBo board is an all in one 3D printer motherboard. It is designed and manufactured by Ultimachine. It includes all power connectors, crimp contacts and housings for thermistors and motors and pre-crimped wires for endstops. A USB cable is also included in this package to connect with your computer. This is the version 1.3.


  • Arduino MEGA compatible Atmega2560 and Atmega32u2 processors are compatible with all RAMPS class firmware
  • Crystals for both usb and mcu (timing accurate to 10ppm)
  • 4 Thermistor jacks
  • All extra pins broken out on both processors (allows using the 32u2 for LUFA AVR programmer, etc)
  • 2 channel SDRAMPS compatible SPI breakout

Motor Drivers

  • 5 A4982 1/16th microstep motor drivers (2 connectors on Z for Prusa Mendel and other dual Z printer designs)
  • Digital Trimpot for stepper current control
  • Current limit on driver IC VCC to prevent permanent latchup
  • Microstep mode configured by MCU through firmware (no jumpers needed)
  • Test points for driver control signals
  • Step and Direction pins are on their own ports for synchronous movement capability
  • Extra driver ports broke out for up to 3 additional drivers

PWM DC outputs (Extruders, Fans, Etc.)

  • 6 outputs
  • Indicator led for each channel


  • Power supply: 12V-35V DC, 16A+
  • Three independent power rails for flexible input power configurations:
  • 1) Heated Bed: 15A 12-24V
  • 2) Extruders and fans: 5A 12-24V (fuse can be exchanged for up to 10A capacity) 10V-26V input voltage
  • 3) Motors and logic: 5A 12-24V (fuse can be exchanged for up to 10A capacity) 10V-26V input voltage
  • Built in SMPS for 5V generation from Motor Power Input2


  • 4 layer
  • 2oz copper on all layers
  • High temperature FR4-TG130 PCB
  • Gold ENIG finishing