PCB Rubber Keypad contact debouncing

Thread Starter


Joined Jul 15, 2011
Hi Everyone,

I am making my very first project using PCB contacts for a rubber keypad and was wondering if there are any debouncing considerations that need to be met.

Typically for a mechanical NO switch I have used the RC method which works great for those switches.

Does something similar need to be done for PCB contacts? I would think that the rubber keypad and PCB contact would not have the debouncing issues like we see in mechanical switches but since I have no prior experience in working with these I wanted to double check.

The layout will be in a matrix form very similar to this schematic:

Thanks in advance for the help!


Joined Jul 9, 2011
Just googled it. Yes, they seem to have the bouncing issue as well, <12ms to <20ms typically.

google: Elastomeric Keypads contact bounce