We are closed this Friday, Sept. 22, 2023. All orders placed on Friday will be processed on Monday, Sept. 25, 2023. Sorry for the inconvenience.

Punch in your secret key into this numeric matrix keypad. This keypad has 16 buttons, arranged in a telephone-line 4x4 grid. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad.

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