<P>The <STRONG>Adafruit Silicone Elastomer 4 x 4 Button Keypad</STRONG> is a little different from most microcontroller keyboards, instead of hard plastic buttons, these are squishy elastomer. Each button has room for <A href="/catalogue/search?filtersearchscope=1&filtercategorypathroot%2foptoelectronics=through+hole+leds&filtercategorypathroot%2foptoelectronics%2fthrough+hole+leds=3mm+leds&filtercategorypathroot=optoelectronics&filterdiscontinued=false&keywords=diffuse">a 3mm LED</A> so that you can illuminate just those keys that are active in your project. You don't have to add LEDs, but it does look pretty cool; diffused LEDs are the best. Because they're made from soft silicon, they're washable and you can trim off any buttons you don't want. Adafruit have also made the keypads edge to edge tileable to create larger arrangements. Each button has a conductive ring which makes contact with a properly designed PCB underneath. Adafruit provide an EagleCad library so that you can design your own. Alternatively you can pick up an Adafruit Trellis driver PCB which will do it for you. The <A href="/catalogue/product/73-5381">elastomer 4 x 4 keypad</A>, <A href="/catalogue/product/73-5380">the Trellis monochrome driver PCB</A> and the <A href="https://www.rapidonline.com/73-5431">Trellis RGB driver PCB</A> are sold separately.</P><P></P><P></P><IFRAME height=364 src="https://www.youtube.com/embed/MW0JLxRgJ1Q?rel=0" frameBorder=0 width=647 allowfullscreen></IFRAME>
- 4 x 4 button matrix with room for 3mm LEDs in each button
- Buttons are wipe clean, tileable, cuttable
- 3mm travel per button
- 4 x 4 keypad and LED driver PCB with I2C connectivity
- Tileable for up to 8 x boards in total
- Dimensions: 60 x 60mm (2.4 x 2.4in.)
