Datasheet

Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau
Item no.: 2481782
Data Sheet
Page 1 of 3
5 V/DC stepper motor and driver board ULN2003
The ULN2003 stepper motor dirver PCB provides a direct drive interface between your microcontroller and stepper motor. The
PCB provides 4 inputs for connection to your microcontroller, power supply connection for stepper motor voltage, and ON/OFF
jumper, a direct connect stepper motor header and 4 LEDs to indicate stepping state.
Stepper Motor Connection
Connect stepper motor to this header. If you use one of our stepper motors they will just plug directly into the
header. If you have another brand without the correct header plug, you could solder the wires directly to the back
of the PCB.
Step State LEDS
Indicate which channel is active.
ON/OFF Jumper
Isolates power to the stepper Motor
Supply
Power to drive stepper motor. Make sure it matches the rating of the stepper motor you are using.
Microcontroller Connection
Connect 4 outputs from your microcontroller to the four inputs.
Supply Volts: 5-12VDC
Maximum Current per output : 500mA
Operation
The driver board accepts a four bit command from any microcontroller and in turn applies the necessary power
pulse to step the motor. At the heart of the driver is a ULN2003AN integrated circuit. The board can supply
between 5V to 12V to the motor from an independent power supply. It also has a bank of LED’s that correspond
to the input signals received from the controller. They provide a nice visual when stepping.