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Feather ULN2003 Stepper Wing #Feather @hackadayio @LexKravitz

Lex Kravitz has designed a ULN2003-based stepper driver board in the Feather board format:

I have several projects that use stepper motors and wanted a simple Feather wing. While Adafruit already makes a Feather motor driver, I designed my own because I wanted to have some buttons and LEDs, as well as a TRRS input port. Costs ~$4 in parts, plus the PCB.

This Feather Wing was made to be hand assembled with through-hole components, which I find easier to put together in small runs.  In the future I may make a version with SMD components as well for professional manufacture.  I made this to control 5V 28BYJ-48 steppers that are easily available for ~$2-3 each.  Often they come with a ULN2003 driver board, if you are thrifty you can grab the chip off the board and move it to this board saving ~50 cents per board.

This board contains:

1) Two 3-pin headers (GND, PWR, and SIG).  These can be used to control a servo or additional sensor.

2) A 3.5mm TRRS port for external control

3) Two LEDs tied to digital pins

4) The ULN2003 motor driver

5) Two small buttons for user control

See the video below, more info on Hackaday.io and kravitzlab.com



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