Reverse Action Micro Switches

[LDR]

Im currently looking at putting eletronics into a pulse rifle build i have been working.

Anyway, i need to put a micro switch into the trigger area to activate sounds and the counter. Now heres the problem. Because i am using a PFC thompson, there isnt much space inside for microswitches etc.
I have noticed though when the trigger is pulled back it makes a space in front of the trigger which would be the perfect place for a microswitch. However, i need the microswitch to function backwards.
So, when the trigger is released it closes the gap, and would press the microswitch down, when the trigger is pulled the gap would be made, and the microswitch released.
Therefore i need a microswitch which is by default on, but when pressed turns off!
Does anyone know if such a microswitch exists, and if so where in the UK can i get one!

Any help on this would be much appreciated!

Thanks

lewis

 

[robn1]

If you want a switch that's always on, but off when pushed, that is called a "normally closed" type. Don't know if a micro is available though.

 

[sawduster]

Many micro switches can do what you want, here's a place in the US. I buy most of my electronics from here:


http://www.allelectronics.com/make-a-store/category/727/Switches-Snap-Action/1.html

 

[LDR]

Thanks for the help guys, thats great.

With regards to the 'normally closed'. I've noticed on some microswitchs they have three places to wire up to. Normally Open, Normally Closed, and C? Does this mean i can wire it up to the normally closed, and it will reverse its function as such?

 

[deck5]

Thanks for the help guys, thats great.

With regards to the 'normally closed'. I've noticed on some microswitchs they have three places to wire up to. Normally Open, Normally Closed, and C? Does this mean i can wire it up to the normally closed, and it will reverse its function as such?

Except for the words you're using to describe it, yes.

 

[LDR]

lol...thanks Deck5!

Thats great (im new to microswitches and electronics, so forgive my wording!)

Time to experiment.

 

[tim]

Thanks for the help guys, thats great.

With regards to the 'normally closed'. I've noticed on some microswitchs they have three places to wire up to. Normally Open, Normally Closed, and C? Does this mean i can wire it up to the normally closed...

Correct up to here. The "C" stands for "common." So, something connected between the common and the "Normally Closed" contacts will do what you want.

 

[LDR]

Thanks Tim, i tested it out last night and it works a treat!

Thanks for the help guys.

lewis