Kenington has produced several models of "Universal Power Supplies" for use with laptop computers and various other pieces of gear.  These power supplies use a special tip which controls the voltage...

[Aurthor's Note: I wrote this article several years ago for another website.  The information is still accurate.  "Doug In The Woods" wrote to my Clever4Hire email address asking for some guidance,...

Introducing the Led Breadcrumb (Led8Bus). Are you fed up of fitting LEDs and current-limiting resistors time after time into your breadboard? It's surprising how often you have to do it, and how much...

Dave's got another great video on how to use a simple push-button switch as an on/off power switch.  Using this circuit can save the cost of a high-current toggle switch and makes a very clean user...

Following on from my previous article here, we have a simple HTTP client for Swordfish. But what use can we make of it, besides browsing the source code of our favourite webpages?Pachube (pronounced “Patch-Bay”)...