Electronic Design

Basic Circuit Eliminates Numeric Keypad Polling

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, ...
Engadget

How-To: The Magic Phone, Part 1: Number Pad Matrix Decoding

This How-To is the first in a series of construction instructions for a project titled The Magic Phone. I was inspired by the Port-O-Rotary from Spark Fun but wanted to take the project to the next ...
Business Wire

Programmable Low-power GPIO/Keypad Controllers Simplify Interconnect Circuits for Large QWERTY Keypads

NORWOOD, Mass.--(BUSINESS WIRE)--Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal processing applications, introduced today the ADP5585 and ADP5589 GPIO ...
Electronic Design

Basic Circuit Eliminates Numeric Keypad Polling (.PDF Download)

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, ...