A4988 stepper driver/A4988 stepstick
Green version maximum current is 2A,resistance is 0.1Ω.
Red version maximum current is 1A, resistance is 0.2Ω.
Stepper driver current calculation formula: i=vref/0.8
There are three pins in potentiometer. Use millimeters’ to test these pin, the voltage is Vref. Can also adjust the current on the potentiometer. Twist clockwise is to increase the current, anti-clockwise is to decrease the current.
1. New chip.
2. PCB copper cover techno70logy upgraded to 2oz(copper thickness is 70μm). Higher copper content, better heat dissipation.
3. Gold-plating melded pin.
Size: 1.5mm X 2mm
Current: 1A (red board), 2A(green board)
Subdivision: 1, 1/2, 1/4, 1/8, 1/16
Manufacture technology: SMT machine manufacture, non-manual soldering, higher quality, stable function.
Suitable for stepper motor, 3d printer(prusa, Mendel,ultimaker, printbot, makerbot etc.) ,CNC, carving machine.
A4988 is a complete microstepping motor driver with built-in translator for easy operation. This product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. A4988 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 microstep. 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.
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