DIY

• 4988 driver board widely used in 3D printers and small CNC machines.
• Simple step and direction control interface.
• Thermal protection, over-current protection, ground fault protection.
• Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step.
• Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage toachieve higher step rates.

Module Interface: 1, DC +: then the power supply positive (voltage according to the relay requirements, with 5V.12V and 24V choice); 2, DC-: connected to the power supply negative; 3, IN1: 1 signal trigger side, you can set the high or low level control relay pull; 1, NO1: 1 relay normally open interface; 2, COM1: 1 relay common interface; 3, NC1: 1 relay normally closed interface; Technical Parameters: Relay version: 24V; Quiescent current: 5mA; Maximum current: 50mA; Trigger current: 2-4mA; Trigger voltage (low level): 0-8V; Trigger voltage (high level): 8.5-24V; High and low trigger select side: 1.S1 for 1-Channel relay high and low trigger selection; 3.COM and LOW connection, the corresponding relay is low-level trigger, COM and HIGH-side connection is high when the trigger.