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Stepper motor controller board version 1 (el cheapo) part 2

As you can see the output from the mega8 is almost perfect. It's a lovely square wave
The output looks abit rough, but it's not bad. If you look closley you'll see the effect of the chopper circuit (The top of the pulse isn't flat, rather it's wobbling.
This is how I've got to work. That's why I love France as we have so much space.

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