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Arcade Microwitches. Why NC?
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MonitorGuru:
NC also works great for connecting microswitches to the coin drop on CoinCo coin doors, where they press against the metal or plastic reject lever on the coin mech (activated by the plastic "pork chop" on the door frame).  This way you can connect up a credit bypass switch where no holes are made in the door/cabinet. Just press the reject and it opens the NC and activates it. WOuld be hard to connect a microswitch any other way to such a door.

And as others have said... microswitches are used in many other areas than arcade... so NC is a required option.
Tailgunner:
I'd tend to think it's more cost efficient to make a switch with both contacts. Doing so saves Cherry the cost of manufacturing both types, it saves the distributors the costs associated with stocking two different versions, it also saves field service techs time and money when they show up to fix something only to find out they needed the other type.
Crazy Cooter:

--- Quote from: Tailgunner on May 22, 2005, 03:38:38 am ---I'd tend to think it's more cost efficient to make a switch with both contacts.
--- End quote ---

Bingo.  No retooling, only one production line.  Probably an extra $0.01 to manufacture but no extra employees/machines/stock/confusion.
Bones:
Yeah, that makes good sense.
Tiger-Heli:
Here's one use for them in our hobby: http://www.mameworld.net/tigerheli/encoder/nocodeload.htm
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