This 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
HPLS enclosure or the 100 series Angled LCD Case from
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A review of several encoders (some out of date)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
|Written August 2010 by Roger Schaefer
Updated April 2015