Posted June 22, 2015 by Chris

"The display consists of 7 LEDs in a vertical row. By moving them fast enough back and forth over each other, I can display a message which appears to be generated by a 7*n matrix of LEDs and not a single column of LEDs."

Posted May 29, 2015 by Chris

"During World War I and slightly before World War II, military fighter aircraft had machine guns mounted to fuselage of the plane. These machine guns were mounted right behind the propeller. The first question that comes to mind is how can the gun fire and not hit the propeller blades as they are spinning? Some planes had special steel plates mounted to the propeller to keep the bullets from shredding the propeller."

Posted May 27, 2015 by Chris

"The device runs in both host and peripheral USB modes however in this design only the host connection has been used since i already had a peripheral interface breakout board already and therefore didn’t need this capability."

Posted May 17, 2015 by Chris

"This part will describe all the hardware and various techniques used to figure out which signal goes where. Why do this? It’s an improvement on the original firmware and an exercise in consumer product design."

Posted May 15, 2015 by Chris

"Add general purpose input/output lines to your computer based projects. This circuit is a 12 pin digital GPIO interface using the Microchip PIC18f14k50 microcontroller which connects to an USB host port. The microcontroller is available in through-hole DIP20 and SMD packages, too."

Posted May 11, 2015 by Chris

"KeySweeper is a stealthy Arduino-based device, camouflaged as a functioning USB wall charger, that wirelessly and passively sniffs, decrypts, logs and reports back (over GSM) all keystrokes from any Microsoft wireless keyboard in the vicinity."

Posted April 29, 2015 by Chris

"This project falls purely into the ‘because I can!’ category – I was poking around the internet one day looking for a Cray emulator and came up dry, so I decided to do something about it. Luckily, the Cray-1 hardware reference manual turned out to be useful enough that implementing most of this was pretty straightforward. The Cray-1 is one of those iconic machines that just makes you say ‘Now that‘s a super computer!’ "

Posted April 25, 2015 by Chris

"This was a gift for my two year old nephew. Since he is a fan of lights and buttons, I wanted to make something blinky for him to enjoy. The concept was simple: make a clear box with buttons and lights that would change color and pattern based on the buttons that were pressed."

Posted April 21, 2015 by Chris

"The HandySwipe provides a portable magnetic card reader interface and display. It collects card data from a Type 2 card reader, and displays the data on a small character LCD screen."

Posted April 12, 2015 by Chris

"Since I posted the write-up for the first table, I have had many requests to create a new version which would be able to withstand shipping, or at the very least, offer a kit so that other users could build their own table. This write-up is for the new version of the beer pong table and contains all of the steps to assemble your own."