Key Features

ULN2003A Chip: 7-channel Darlington array with built-in base resistors .

High Channel Current: Up to 500mA per channel (with proper power supply and cooling) .

High Channel Voltage: Up to 50V, suitable for various motors and relays .

Built-in Flyback Diodes: Protects your electronics from reverse voltage spikes generated by inductive loads (motors, relays) .

XH-5P Connector: Direct plug-and-play connection for the 28BYJ-48 stepper motor .

Accessible Pins: All chip pins are broken out for easy connection .

Status LEDs: 4 onboard LEDs indicate signal status (typically for IN1–IN4) .

Flexible Power Supply: Operates from 5V to 12V DC (load is powered from this voltage) .

Compact Size: Board dimensions are only 40.5 × 21.3 mm .

Key Technical Specifications

Pin Configuration

Pin Group Label Description

Signal Side (Low Voltage) IN1 … IN7 Control pins (connect to MCU, 3.3V or 5V)

Load Side (High Voltage) OUT1 … OUT7 Load connection pins (motor, LED, relay)

Power VCC / GND Motor/Load power supply (5-12V) and ground

Motor Connector XH-5P Dedicated socket for 28BYJ-48 (pins: Red, Blue, Orange, Yellow, Pink/Grey typical)

Status LEDs 4 LEDs Visual indication of IN1-IN4 signals