Summary

work in progress... Images shown may not be the latest revision, will update when prof of functionality is completed.

A custom designed 3D Printer Shield for the Arduino Mega 2560 using Marlin firmware

Supports:
Heat bed (aiming for 2)
4 extruders with fans
EX1 & EX2 connectors
High side power +12v/+24v (bed, heaters w/fans)
Logic side power +12v / +24v for stepper drivers and aux fans (Buck converter for Arduino Mega 2560 power when using +24v)
Plug in Fuses (bed1, bed2, Extruder0 / Fan, Extruder1 / Fan, Extruder2 / Fan, Extruder3 / Fan
2 servos
6 therm resisters (Bed1, Bed2, Therm0, Therm1, Therm2, Therm3)
4 aux fan
I2C Mux for additional pins (Analog, Digital, PWM)
Filament runout sensor support pin
Filament Width sensor support pin
Z Probe sensor support pin

All parts rated for +30v or higher