1. Based on Raspberry Pi 40PIN GPIO interface design, suitable for Raspberry Pi series motherboards, Jetson Nano. On-board two-way DRV8825 motor driver chip, built-in converter, easy to control, can drive two stepper motors2. Support to select six different step resolutions by DIP switch: full step, half step, 1/4 step, 1/8 step, 1/16 step and 1/32 step3. Support to adjust motor drive current through potentiometer, support up to 2 5A current output4. Support over current protection, thermal shutdown, under voltage lockout. Onboard 5V voltage regulator chip, which can directly supply power to Raspberry Pi5. A variety of stepper motor interfaces are onboard, which is convenient to access stepper motors of different specificationsMotor driver chip: DRV8825Logic level: 3.3VMotor drive voltage: 82V~28VProduct size: 65 x 56mmMotor drive current: 2.5AVia diameter: 3.0mmApplicable motor: SM24240, SM25776, 5V stepper motor (sold separately)Applicable power supply: power supply US standard 9V 2A outer diameter 5.5 inner diameter 2.1 (sold separately)color:BlueMaterial:MetalPackage Contents:1 x Motor Driver BoardOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.