![]() Half of connection point for bi-polar stepper motor coil B.Ĭoil B-: DMOS Full Bridge 2 Output A. Other half of connection point for bi-polar stepper motor coil A.Ĭoil B+: DMOS Full Bridge 2 Output B. Half of connection point for bi-polar stepper motor coil A.Ĭoil A-: DMOS Full Bridge 1 Output A. Board Top PinsĬoil A+: DMOS Full Bridge 1 Output B. Several pins of the A4988 IC are broken out on the Big Easy Driver, allowing direct connection to a bi-polar stepper motor, as well as a microcontroller. Functionality between the two sets does not change. You can use whichever pin connections work best for your project. The secondary connection points are closest to the edge of the board, and are spaced to fit 2-pin screw terminals. The first, which are the pins closest to the center of the board, are spaced out to fit standard 0.1" headers. Each pin present on the board has two connection points. ![]() The Big Easy Driver is designed around the Allegro A4988 motor driver.
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