Here you have a new interface for Prusa Mendel or any other RepRap 3D printer. You can find more information about the module and its mount in: http://www.thingiverse.com/thing:17497It'Å› very easy to control your printer without the computer with this module. You can design your own comands for homing or move the axis 100mm to calibrate for example.Video testing the module: http://www.youtube.com/watch?v=tSFWe5Wg84s&list=UUsL_2N4ZI3jM0OfP56o6geQ&index=1&feature=plcpFEATURES: -Added ModuleTM1638.pde to Sprinter firmware. -Modified Configuration.h to use with RAMPS 1.4 pins: // TM1638 BOARD: -Modified Setup() and Loop() to allow the interface implementation.To save this firmware to your printer:1.Unzip and copy the content of "Sprinter_TM1638_v1.0.rar" to your sketchbook folder of arduino.4.Upload the firmware.To use the v1.0 press the next buttons to: -S8: homming all axis. -S7: power on the main power. -S1+S7: power off the main power. -S2: move 100mm the X axis to positive way -S3: move 100mm the Y axis to positive way -S4: move 100mm the Z axis to positive way -S1+S2: move 100mm the X axis to negative way -S1+S3: move 100mm the Y axis to negative way -S1+S4: move 100mm the Z axis to negative way