ULN2803A Relay Stepper Motor Driver


ULN2803A Relay Stepper Motor Driver

This is a high voltage, high current driver board made using the IC ULN2803, which consists of 8 NPN Darlington Transistor Array with Common Cathode clamp diodes for switching Inductive Loads. Each darlington pairs can drive currents up to 500mA and they may be connected in parallel for higher current capability.

109.00 95.00

Out of stock

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ULN2803 of this driver board has a 2.7KΩ series base resistor for each Darlington Pair which enables its operation directly with TTL or 5V CMOS devices.


  • 500mA per Output
  • Total Current : 4A
  • High Voltage Outputs up to 50V
  • Output Clamp Diodes
  • Inputs compatible with various Logic Voltages
  • On-board LED Power Indiacator
  • Power Supply Filtering Capacitors


  • Stepper Motor Driver
  • Relay Driver
  • Hammer Driver
  • Lamp Driver
  • LED and Gas Discharge Display Driver
  • Line Drivers
  • Logic Buffer