{"title":"Membrane 3x4 Matrix Keypad + extras [3x4]","handle":"membrane-3x4-matrix-keypad-extras-3x4","url":"/products/membrane-3x4-matrix-keypad-extras-3x4","description":"\n  Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 3x4 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 7 microcontroller pins (3-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code.We include a 7-pin extra-long header strip so you can plug this into a breadboard with ease.\n\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":12259,"title":"Default Title","sku":"AF-419","price":8.57,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}