# Unipolar Stepper Motor Controller ULN2004A Template ## Description This project is a Unipolar Stepper Motor Controller based on ULN2004A Template #motorController #ULN2004A #stepperMotor #motor #controller #referenceDesign #project #polygon ## Project Details - **Owner:** vasy_skral - **Created:** 11/5/2024 - **Last Updated:** 3/8/2026 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Copies:** 5 ## Key Components ### CONTROL — [Connector 01x04 0.100](https://www.flux.ai/vasy_skral/connector-01x04-0100.md) - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### MOTOR — [Pin Header 01x06 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x06-254mm-vertical.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### POWER — [TerminalBlock-01x02P-3.50mm](https://www.flux.ai/vasy_skral/terminalblock-01x02p-350mm.md) - Part Type: Connector **Pins:** - P1 [pin 2] - P2 [pin 1] ### U1 — [ULN2004A](https://www.flux.ai/jecstronic/uln2004a.md) - Manufacturer Name: STMicroelectronics - Part Type: Transistor Array - Manufacturer Part Number: ULN2004A - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/f3/6e/c8/64/4d/b3/4e/38/CD00001244.pdf/files/CD00001244.pdf/jcr:content/translations/en.CD00001244.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - COM [pin 9] - GND [pin 8] - I1 [pin 1] - I2 [pin 2] - I3 [pin 3] - I4 [pin 4] - I5 [pin 5] - I6 [pin 6] - I7 [pin 7] - O1 [pin 16] - O2 [pin 15] - O3 [pin 14] - O4 [pin 13] - O5 [pin 12] - O6 [pin 11] - O7 [pin 10] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasy_skral/unipolar-stepper-motor-controller-uln2004a-template](https://www.flux.ai/vasy_skral/unipolar-stepper-motor-controller-uln2004a-template).* --- *Generated from [https://www.flux.ai/vasy_skral/unipolar-stepper-motor-controller-uln2004a-template](https://www.flux.ai/vasy_skral/unipolar-stepper-motor-controller-uln2004a-template)*