Dave Jones at the EEVBlog covered voltage doublers in a recent episode.  His latest tutorial covers a variation of the technique, the voltage inverter.  This is excellent technique to have at...

When designing a microcontroller circuit, you may need a source of higher voltage.  This is particularly true when using a 3.3 volt micro such as the PIC18F25K22 on the Amicus board or when using...

Aruna Rubasinghe - February 28, 2013 This is a repost from EDN Magazine's Design Ideas There are several ways to read multiple switch inputs using a reduced number of microcontroller-unit (MCU) pins....

Aruna Rubasinghe - May 8, 2013 This is a repost from EDN Magazine's Design Ideas Matrix keyboards are common as an input device in microcontroller-based projects. A conventional way of connecting a matrix...

Zoran Mijanovic & Nedjeljko Lekic - March 28, 2013 This is a repost from EDN Magazine's Design Ideas. This Design Idea shows how a single microcontroller port can drive a lot of output lines through...