Behavioural mixed-signal model28BYJ-48 5V + ULN2003 boardstepper_28byj48
Stepper motor 28BYJ-48 + ULN2003 driver
Unipolar 5 V geared stepper motor with ULN2003 driver board: IN1–IN4 switch the four phases (~100 mA each from VCC); 4096 half steps per revolution of the output shaft. Above ~1000 half steps/s the motor loses steps. The shaft rotates in the schematic. Drive e.g. with the Stepper library (pins in the order IN1, IN3, IN2, IN4).
Key data
- Category
- Modules
- Simulation model
- Behavioural mixed-signal model
- Manufacturer part number
- 28BYJ-48 5V + ULN2003 board
- Reference prefix
- M
- Pins
- 6
- Land pattern
- PinHeader_1x06_P2.54mm_Vertical
Simulation model
A behavioural model implements the interface of the chip (registers, protocol, timing) at its pins. The pins are connected to the analog circuit like CMOS pins.
- Model
- stepper
- Supply pins
- VCC / GND
Pins 6
| Pin | Name | Use |
|---|---|---|
| IN1 | IN1Input pin | Coil phase 1 from a GPIO |
| IN2 | IN2Input pin | Coil phase 2 from a GPIO |
| IN3 | IN3Input pin | Coil phase 3 from a GPIO |
| IN4 | IN4Input pin | Coil phase 4 from a GPIO |
| VCC | 5VSupply pin | Motor supply 5 V (separate from the logic supply if possible) |
| GND | GNDGround pin | Ground |
PCB
Connector / off-board
PinHeader_1x06_P2.54mm_VerticalULN2003 driver board on a 6-pin header (IN1–IN4, 5V, GND)