USB Controller Board -5 Pieces A4988 3D Printer Stepper Motor Driver Module with Heatsink for Rap Mendel 15x20MM Highlights generic brand 5 Pieces A4988 3D Printer Stepper Motor Driver Module with Heatsink for Rap Mendel 15x20MM Description: Suitable for driving from 8 V ~ 35 V 2 A depending on the stepper motor. Single simple step and direction control interface, five different stepping modes: full, half, 1/4, 1/8 and 1/16. Adjustable potentiometers can adjust the maximum current output, resulting in a higher step rate. Automatic current decay mode detection/selection. Over temperature shutdown circuit, under voltage lockout, cross current protection, ground short circuit protection and short circuit protection. specification: Material: PCB material Size: 15mmX20mm (for RAMPS, ultimaker or other compatible board) Can drive current: 2A (the best heat sink installation, will be attached to the heat sink, you need to install) Segment: 16 ventilation Machine patch production, 2oz copper PCB (copper thickness of 70um, ordinary is 35um), high copper content, good heat dissipation. Arduino 2560 CPU core board Ramps1.4 main control board A4988 stepper driver board motor drive module (single 4, double 5) LCD LCD controller can be LCD LCD control, SD card is offline (optional ) or other compatible motherboard Package includes: 5x A4988 driver board 5x heat sink