Touch Sensitive Keypad

[cobra1]

Hi Guys

I am building a project that uses a keypad, currently im using a 3x4 matrix keypad

To add a bit of spice i wanted to make my keypad so that i press a piece of glass, looks a bit more futuristic.

I belive i would need a Capacitive switch, but all the circuits i have found are fairly complex and making 12 circuits for 12 switches would be a big extreme.

anyone got any ideas or know of existing circuits that i could use??

 

[Boncuk]

Hi Chris,

I probably found what you are looking for.

Please check out "CYPRESS TOUCH SENSING BUTTONS".

There also exists a free evaluation kit "CY3218-CAPEXP1" including the installation software and all hardware required.

I haven't tried my evaluation kit yet, because I probably inserted the USB interface upside down and ruined the whole thing.

That's what the box contains: Sorry for the bad focusing. I have to get familiar with the camera (12Mpixels) before I can make better images.

Regards

Hans

 

[cobra1]

Hi Hans

Cheers for the input, i will have a look at this evaluation kit, it might prove useful as i wanted to make me a custom keypad rather than the standard 12 digits, was thinking of an up/down/left/right enter sort of setup.

 

[Bunkka]

Hans,

Could you share with me where you were able to find the free evaluation kit? All I have been able to find so far is the same kit, only for ~100USD.

edit: Meant to ask if you needed some sort of credentials to be able to receive the kit for free.

Thanks!

 

[Boncuk]

Hi Bunkka,

I received a news letter from Cypress one day offering the free evaluation kit.

You might try to get it directly at Cypress as well.

Hans

 

[toop]

if you want to be futuristic id place a mirror inside of the glass on-top of the circuit so it looks like they's nothing but glass and no circuit