Description: RAMBo (RepRap Arduino-compatible Mother Board) is an all in one RAMPS class motherboard targeting convenience reliability and performance. 1 Logic Arduino MEGA compatible Atmega2560 and Atmega32u2 processors are compatible with all RAMPS class firmware Crystals for both USB and mcu (timing accurate to 10ppm) 2 4 Thermistor jacks 3 All extra pins broken out on both processors (allows using the 32u2 for LUFA AVR programmer etc.) 4 2 channel SDRAMPS compatible SPI breakout 5 5-Channel 16 subdivision A4982 XY axes support all the way Z-axis support parallel two-way extruders E-axis support independent two-way 6 Motor drive control signals have test points 7 Motor drive control by firmware subdivision 8 Leave the LCD interface can support 2004LCD control module and the control module 12864LCD 9 5-channel PWM output can be controlled extruders fans etc. 10 There are three inputs have the power fuse: hot-bed extruder motor are all 12V 15A 11 4-layer 35um copper PCB (four panels)