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The A4988 and DRV8834 are both great little bipolar stepper motor drivers. They are used in almost all 3D printers and desktop CNC mills. If you have ever tried to prototype with either of these boards, it can be a nightmare. This little breakout board allows you to mount either driver and configure it using built-in solder jumpers.
It comes with all the hardware you need to power your driver with a computer power supply, or you can get some extra 5.0mm screw terminals to power it with a different power supply. The board has a built-in power LED and a 100 uF capacitor which is recommended in the datasheet.
DRV8834 Operating Range: 2.5-10.8 V
A4988 Operating Range: 8 – 35 V