Hey,

This is the PCB inside of a NES controller. When the player presses a button, the pad connected to the underside of the button comes in contact with the circular pad on the PCB which completes the circuit for that particular button.

Are these some type of membrane switches? Does anyone know the name of these types of switches?

 

Single pole, single throw, normally open.

 

Single pole, single throw, normally open.

I'm sorry. I meant for the title to be "What Type of Switches are These?".

 

I can't remember. I can say they are based on conductive carbon that has significant resistance, but sufficient conduction for the circuit they are used in.

Anybody else know the answer?

 

I've always known them as Membrane Switches.

 

Some people call them chiclet switches but "conductive rubber switch" and "conductive rubber keypad" are common industry terms.

 

It seems that they would eliminate contact bounce because the contact is caused by direct human input, that is, there is nothing that would bounce...

Does this seem reasonable?

 

No. Your implication that only a switch with a sprung contact indirectly tied to the mechanical actuating force can bounce is incorrect. Even a soft contact material held open by nothing but gravity in an inverted configuration will exhibit some bounce. Membrane switches don't bounce as much as switches with springy metal contacts but they still bounce.

http://www.maxim-ic.com/app-notes/index.mvp/id/287

 

hi,

very informative reference on switch bounce . i agree with your comment. that's why switch debouncing is still needed.

mozikluv

 

Does anyone know how I could get these types of switches implemented on a PCB?

 

Since most are custom designed into your product, the manufacturers have design guides.