Thread: The illusive Boxford 260vmc
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06-08-2010 #11
look on fleabay for "slotted opto", returns half a dozen options... just the device.. will need mounting on a small circuit board with a couple of resistors, and you'll have to rig up some sort of vane on the spindle to interrupt once per rev...
Alternatively, and more easily, if you are set on the ebay display, use a 74HC390 divider chip to give a 'divide by 50' with only 1 chip and 10 solder joints!
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