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Author Topic: pic to stepper motor driver pc conturol U-2 Stepper Translator IC  (Read 2751 times)
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xdsoft42
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« on: February 12, 2008, 09:04:54 21:04 »


Vdd:      5V +/- 10%
Vss:      0V (ground reference)
A Step:   Step input, step will be made on negative-going edge
A Dir:    Direction input, is read when step line goes low
A1-4:     Output for a unipolar motor in half-step sequence
B Step:   Step input, step will be made on negative-going edge
B Dir:    Direction input, is read when step line goes low
B1-4:     Output for a unipolar motor in half-step sequence
MCLR:     Master clear and Reset.  This line must be held high for normal operation.  Pull low to reset the chip.
OSC1/OCS2: Clock inputs - see diagram below for RC oscillator hookup.
Unused:   Just like it says, leave this pin floating if you like.  In Hakan Ertan's version, this selects full/half stepping.
Source code for the U-2 (a PIC 16F84 running a dedicated program) can be downloaded here and you can program the IC's yourself.  If you don't have a PIC programmer or are feeling lazy, you can buy pre-programmed and tested chips from me for $10 apiece.  See the ordering page for details.

   Hakan Ertan has uploaded code that adds full/half-step selection on pin 3.  Download his code here.  He has also submitted code for a version that runs on the PIC12C508A microcontroller.

  Here is a sample circuit schematic using the U-2 as a stepper driver for two unipolar motors (click view full-size)


http://www.dakeng.com/u2source.zip

Posted on: February 12, 2008, 09:01:16 21:01 - Automerged



http://www.dakeng.com/u2.html
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