board I/O module

ULN2003 / 28BYJ-48 stepper

The ULN2003 / 28BYJ-48 stepper is a board I/O module in the LabWired part catalog. Its catalog type is uln2003. It connects to the MCU over GPIO. The catalog gives a supply range of 5–12 V. It has 10 pins. A registered peripheral model runs in the engine: the firmware talks to it over the real bus and gets device-accurate responses.

Key facts

Category	Board I/O modules
Catalog type	`uln2003`
Interface	GPIO
Supply range	5–12 V
Pins	10
Datasheet	Texas Instruments ULN200x high-voltage high-current Darlington array datasheet

What LabWired simulates

What is simulated

Simulated device model

How it was validated

Built from the datasheet. Implemented from the part’s register documentation and exercised by automated tests. Nothing physical was ever placed next to it.

ULN2003 / 28BYJ-48 stepper pinout

Power: VCC, GND
GPIO: IN1, IN2, IN3, IN4
Other signals: OUT1, OUT2, OUT3, OUT4

Pin	Electrical type	Function
`VCC`	Power input	Supply
`GND`	Power input	Supply
`IN1`	Input	GPIO
`IN2`	Input	GPIO
`IN3`	Input	GPIO
`IN4`	Input	GPIO
`OUT1`	Passive	—
`OUT2`	Passive	—
`OUT3`	Passive	—
`OUT4`	Passive	—

How to simulate the ULN2003 / 28BYJ-48 stepper in LabWired

Open the Playground at app.labwired.com and place an MCU board.
Add the ULN2003 / 28BYJ-48 stepper (catalog type uln2003).
Connect VCC and GND to the supply and ground of the board. Use a supply inside the catalog range of 5–12 V.
Connect IN1, IN2, IN3 and IN4 to free GPIO pins.
Connect OUT1, OUT2, OUT3 and OUT4 as your circuit needs.
Run the firmware. It drives and reads the pins of the part, and the device model responds on those pins.

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Modelled from Texas Instruments ULN200x high-voltage high-current Darlington array datasheet.

Wire it up in Playground → See the full validation matrix