This is an application note of Microchip’s USB keypad reference design. It covers the demonstration highlights of USB keypad, the procedure of using the USB keypad, the hardware layout, the block ...

Traditionally, interfacing a microcontroller with an n-by-m keypad required n + m of the microcontroller's I/O pins for keypad scanning. Keypad designs that conserve microcontroller pins have been ...

A light guide transmits light with high uniformity and minimal loss from an LED light source to a particular area away from its light source. Light guides are made from optical grade material such as ...

Giving various users access to enclosures just got easier, thanks to a flexible, membrane keypad from Southco, Concordville, Pa. It holds up to 120 different user codes and can independently control ...

John E. Karlin, the original creator of all-digit dialing as we know it today, passed away at the age of 94, The New York Times reports. He is credited with designing the keypad we now use every day ...

Using eight digital inputs, this circuit simplifies decoding of the common membrane 4x4 keypad matrix and eliminates the traditional requirement of scanning rows or columns. Any X-Y switch matrix, ...

Charlie is a gaming writer and journalist who has been covering the video game industry for over a decade. He is also a regular contributor to various gaming magazines and websites, such as Game ...

If you want keyboards, we can get you keyboards. If you want a small keyboard, you might be out of luck. Unless you’re hacking Blackberry keyboards or futzing around with tiny tact switches, there’s ...