I suppose this is the best area for the question -

 

Does anyone know how to construct a latch from 2 normally open switches?

 

Not homework - just a brain teaser i can't solve!

Please explain in detail. I am not able to understand.

its difficult to explain. Normally Open switches do what they say on the tin, they're normally open untill a force is applied to it to close it.

 

A latch takes a signal high or low and keeps the signal.

 

Apparently its possible to make one with two normally open switches.

You use cellatape to stick it down when you want it closed and stayed closed.

a latch circuit controlled by two buttons?

it's a 2 transistor thing.

one is held on by the other being off until one of the buttons applies a bigger bias to force the circuit into the other state.

i'll try to dig it up from my pile-o-junk and post a schematic

switches as in physical Toggle switches etc.. or something like the 4016 or 4066 types?

if it`s the latter you can do it with just One switch and don`t need 2 at all