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Momentary switch

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daviddoria

New Member
I bought some of these at Radio Shack. The idea here was to have a circuit on only when i am holding the switch.... however, it turns on only when i am NOT using the switch.

There are only 2 leads....

any one know whats up?

david
 

Phasor

Member
You have bought what is known as a "normally closed" switch.

Switches can be "normally open" (which is what you want) or "normally closed". These are usually abbreviated to N/O and N/C.

An N/O switch is open when you are NOT pressing it, and closed when you press it. An N/C switch is the opposite - closed when you are NOT pressing it, and open when you press it.

Take your switches back to Radio Shack, and ask to replace them with N/O switches.
 

daviddoria

New Member
hahaha excellent. i notice that on the package now... i didn't even think to look hehe.

thanks man
 
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