Membrane Keypad

Click for larger viewThis is a 40 keyswitch membrane keypad.  The switches are arranged in a 8 row by 5 column X-Y matrix brought out to a 3 inch ribbon cable.  The connector is a 13 position female with .1 inch spacing.  The rear adhesive is 3M467.  The size of the keypad is 4.3" high by 3.5" wide.  Here is a drawing of its circuit.

The keypad exactly fits the top panel indentation in the PacTec HPLS enclosure or the 100 series Angled LCD Case from Box Enclosures.

The price is $ 16.95 ea.  payable thru PayPal. 

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Here is an example of interfacing the keypad.

Here is an example of Arduino software for this keypad.

Here are some links that may be helpful:
A review of several encoders (some out of date)
PDN1188 Keypad Encoder IC from Paladin Semiconductor

abm marking ltd

Written August 2010 by Roger Schaefer
Updated April 2015