EDN

Connect a 4×3 matrix keyboard to a microcontroller using two I/O pins

Matrix keyboards are commonas an input device in microcontroller-based projects. A conventionalway of connecting a matrix keyboardto a microcontroller is to use multipleI/O pins of the MCU. The MCU ...
Design-Reuse

Digital Blocks Announces the Re-launch of its DB8279 Programmable Keyboard / Display Interface IP Core

Originally Marketed through a Business Partner, Digital Blocks offers the DB8279 Direct. GLEN ROCK, New Jersey, June 30, 2006 Digital Blocks, a leading developer of silicon-proven semiconductor ...
Security

Infinova's New V2117 Keyboard for Control of PTZ Domes, Matrix Switchers and DVRs

Infinova's new V2117 keyboard provides easy operation of Infinova PTZ domes, matrix switchers and DVRs, and programming and control of matrix switcher functions including tours and salvos. It allows ...
EDN

Two-wire, four-by-four-key keyboard interface saves power

You can use a microcontroller that includes an ADC to design a two-wire-plus-ground keyboard interface. For example, you can use a resistive voltage divider to identify a pressed key (Reference 1). A ...