wiring Unipolar 12V stepper to RPI

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paul_sanchez
 
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wiring Unipolar 12V stepper to RPI

Post by paul_sanchez »

Hello,

I'd like to control a 12V unipolar stepper motor with the PI using the ULN 2803 but cannot find wiring instruction.
I went through the stepper tutorial but wiring to RPi is different because of 12V compared to the 5V stepper used in the tutorial.

Any help would be much appreciated
Paul

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adafruit_support_bill
 
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Re: wiring Unipolar 12V stepper to RPI

Post by adafruit_support_bill »

The connections are mostly the same. But you will need a 12v power supply.

First: Disconnect the jumper between the 5v pin of your Raspberry Pi and the Common pin (pin 10) of the ULN2803.

Then: Connect the negative lead from your power supply to the GND pin (pin 9) of the ULN2803.
Connect the positive lead from your 12v power supply to the the Common pin (pin 10) of the ULN2803.

paul_sanchez
 
Posts: 7
Joined: Thu Sep 05, 2013 5:57 am

Re: wiring Unipolar 12V stepper to RPI

Post by paul_sanchez »

Great, it's working now. Many Thanks. Paul

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