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Switches convert to NC

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I thought i saw something on the web once where a transistor was used to convert a normaly open switch to normanal closed switch or is the any way to do this w/o a relay?

Just in case i didn't explain it correctly, I need a a pushbutton switch that stays open when pushed.. so, I think that is a "normal open switch"
thanks any help will be great.
 
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Externet

Well-Known Member
... I need a pushbutton swith to work where if it's pushed the light turns on and if you let go the light will turn off.
thanks any help will be great.
That is not a normally closed switch, that is a plain normally open switch and needs nothing else than a 'momentary pushbutton switch' from any electronics store.

+--------------./ .----------------load--------------gnd

Like a doorbell pushbutton switch.

Miguel
 
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Hero999

Banned
You could use a relay with NC contacts but you're better off just buying the correct switch.
 
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That is not a normally closed switch, that is a plain normally open switch and needs nothing else than a 'momentary pushbutton switch' from any electronics store.

+--------------./ .----------------load--------------gnd

Like a doorbell pushbutton switch.

Miguel
Actually i need a a pushbutton switch that stays open when pushed.. so, I think that is a "normal open switch"
 

Hero999

Banned
Would it work with a transistor?

Please post as schematic so we can see the bigger picture.
 

kjennejohn

New Member
I had to buy switches both N/O and N/C of the same type. I got them both as four-switch packs at Radio Smack. They called yours out as normally-closed in their catalog, but fail to label the normally-open as such.
Here you go:
Mini SPST 0.5-Amp Momentary Switch (4-Pack) - RadioShack.com

These are what you want, at RShack. They are the same cheap failure-prone junk as your first find. BTW, the red and black plungers don't indicate which type you are using, both packs have two red and two black. Use labels!

Take care,
kenjj
 
I had to buy switches both N/O and N/C of the same type. I got them both as four-switch packs at Radio Smack. They called yours out as normally-closed in their catalog, but fail to label the normally-open as such.
Here you go:
Mini SPST 0.5-Amp Momentary Switch (4-Pack) - RadioShack.com

These are what you want, at RShack. They are the same cheap failure-prone junk as your first find. BTW, the red and black plungers don't indicate which type you are using, both packs have two red and two black. Use labels!

Take care,
kenjj

Ok So I found another switch but just so you know for future reference those switches are NC switches there were zero NO type switches.
 
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