3D Printer Circuit Board Control Panel For RepRap Melzi ATMEGA1284P

Working voltage: DC12V Integrated G code Mini SD card, could realize off-line printing Main chip: ATMEL ATMEGA1284P chip Onboard FT232RL interface switch chip USB interface: connect with computer for data communication and programe download Integrated 4 A4988 stepper motor driver Could control hotbed MK1, MK2a, MK2b, MK3 Integrated 3 MOSFET driver hotend, hotbed and fan Dimensions: 21 x 5 cm 　 Package includes: 1 x SainSmart 3D Printer Circuit Board Control Panel For RepRap Melzi ATMEGA1284P