Description:_x000D_ A4988 is a complete micro-stepping motor driver with built-in translator for easy operation. It includes a fixed off-time current regulator, the regulator in slow or mixed decay modes. A4988 converter is the key to the easy implementation. As long as the "step" input inputting one pulse drives the motor one micro-step. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened._x000D_ _x000D_ Features:_x000D_ _x000D_ Simple step and direction control interface, short-to-ground and shorted-load protection. _x000D_ Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step. _x000D_ Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay). _x000D_ Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection. _x000D_ Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor's rated voltage to achieve higher step rates. _x000D_ Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption. _x000D_ _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Step Mode: Full, half, 1/4, 1/8 and 1/16 _x000D_ Output Driver Capacity: 35V, 2A _x000D_ Driver Size: 20 x 15mm / 0.78 x 0.59" _x000D_ Heat Sink Size: 5 x 5mm / 0.19 x 0.19" _x000D_ _x000D_ Package Includes:_x000D_ 1 x Driver module_x000D_ 1 x Heat Sink