Rambo Mini 1.3a
Original Rambo Mini 1.3a by Ultimachine
Major Features - 4 x integrated 1/16th micro-step motor drivers, 4 PWM Mosfet outputs, 3 thermistor inputs, pwm motor current control (no tiny knobs to tweak), SMPS supports hostless printing on power supply voltages from 10-28V DC, 2 fuse protected power rails (Heated Bed, 15A 10-35V, and Primary Power 10A 10-28V: Motors (5A dedicated fuse) + Extruders, Fans, & Logic (5A dedicated fuse)), LUFA USB, high quality connectors.
Firmware / Hardware Information:
Mini-Rambo is designed to work with the current RAMPS generation firmware with minimal modifications to add firmware pwm motor current control and the micro-step setting pins.
Linux and Mac use CDC interface and have hardware driver built in. Mini-Rambo Windows hardware driver: RAMBo_USBdriver.zip
A preconfigured Marlin Firmware is preloaded onto the board. To re-flash this board, you can simply use the Arduino IDE with Rambo Addons and set the board to "Rambo". There is an Arduino plugin folder on Github that exposes additional pins in the Arduino IDE.
Recommended Power supply 12V-28V DC, 16A+.
Additional information and sources at RepRap.org/wiki/MiniRambo. This board is Open Source Hardware licensed GPLv3, so please use, copy, improve, hack, upgrade, and/or contribute.