Item Type: Stepper Motor Driver Board <br>Material: PCB <br>Model: HP240 <br>Length Range: ±800000 pcs (number of punches of stepping motor at a time) <br>Rotation Speed Range: 20-10000 pulses/sec (rotation speed of stepping motor) <br>Acceleration Stages: 1-9 levels (the stepping motor has 9 stages to choose from) <br>Drive Voltage: 7-25VDc <br>Drive Current: <700mA <br>Working Temperature: -40℃-65℃ <br>Storage Temperature: -40℃-65℃ <br>Product Size: Approx. 45 x 35 x 15mm / 1.8 x 1.4 x 0.6in<br>1、A small stepper motor drive module, drive two?phase four?wire stepping motor <br>2、Communicate with the host computer through TTL232 mode, easy and convenient to use. <br>3、Automatic acceleration and automatic deceleration programs in the module to ensure that the stepper motor does not lose step during the driving process. <br>4、Can control stepper motor, drive program?controlled trolley, have stable and excellent performance. <br>5、Small in size and light in weight, convenient to carry and use at any time, very convenient and practical.1. Serial port communication format: baud rate 9600, no parity bit, 8?bit data, 1?bit stop <br>2. Remarks: The data is binary complement. When using it, pay attention to the correct polarity of the power supply before powering on. VR1 is to adjust the motor drive current and increase it clockwise.1 x Stepper Motor Driver Board