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[TCML] Coil winding - cheap turn counter

Here's a picture of the coil winder we built:
http://www.stephenhobley.com/coilwinder.jpg <http://www.stephenhobley.com/coilwinder.jpg> 
I just did 1308 turns of #30 wire on a 3.5" form. We used a stepper motor controller (K179) which worked out cheaper than a PWM controller for a DC motor. There are controls for speed, direction, and a footswitch to start turning. 
The little box at the bottom of the picture (with 1308 on it) is a counter from an exercise machine. It has a mercury tilt switch in it and can be attached to the form or axle and every rotation it increments the count.
http://www.allelectronics.com/make-a-store/item/EX-59/EXERCISE-COUNTER/TIMER-W/-MERCURY-SWITCH/-/1.html <http://www.allelectronics.com/make-a-store/item/EX-59/EXERCISE-COUNTER/TIMER-W/-MERCURY-SWITCH/-/1.html> 
It also tells you time spent winding, and calories burned while winding - always good to know. 
For $2.65 you can't go wrong.
317 201 4281
The Laser Harp Project - www.stephenhobley.com/build

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