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, ...
Hackaday

How-To: Make An RGB Combination Door Lock (Part 1)

Putting a custom designed electronic lock on your space seems like a geek right of passage. For our latest workspace, we decided to skip the boring numbered keypad and build a custom RGB backlit ...
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 ...
EDN

Camera serializer/deserializer chip set reduces wire count for keypad

Many systems that require a user to manually enter data feature a keyboard similar to that in Figure 1. Although early keypads comprised arrays of individually wired switches, a typical modern keypad ...
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, ...