Limit switch wiring help

[Supermario]

Originally Posted by Lmackattack

I was surfing eBay and see a lot of people list these micro switches as no/nc


Does it specifically have to be a nc switch or is it just hiw it's wired will determine the nc position?

Some switches have 3 terminals and you can choose NC or NO.
a NC switch is what keeps this circuit simple. Using a NO switch would require more diode fun that you don't need.

Normally closed as to say there is a connection when not touched. when you push on it, power is lost.

heres a switch with choice of no/nc

http://www.robotshop.com/en/micro-co...it-switch.html

[RCP57]

Do a search for them on Amazon. I bought some from there that were pretty reasonable if you don't need them in a hurry. They came directly from Hong Kong...

[motocrawler]

Thanks so much for the drawing supermario it explains everything so simply and clearly! I am using a 7.2volt lipo battery and it is powering a Pololu 25D 99:1 gear motor. What amperage switch would you recommend and what diode? Thanks again!

[RCP57]

Those are the same motors that I am using on my dump boxes. I am running 5amp switches because that's what the motors stall current is.