Posted January 18, 2015 by Chris

"The term ‘mixed-signal’ is usually reserved for circuits and ICs that process both analog and digital signals. In that sense the title ‘A mixed-signal LED clock’ is perhaps misleading since this is a digital clock from beginning to end. However, the readout is analog and since the beast had to be given a name, I a called it my ‘mixed-signal’ clock. "

Posted January 14, 2015 by Chris

"I always wanted a fast way to make PCB prototype before send the project to a fabhouse and wait 2 or more months to see the result. This is why I built this CNC, it’s made from cd-rom parts and was inspired viewing some similar projects on internet."

Posted January 13, 2015 by Chris

"An autonomous robot requires both: actuators and sensors. Actuators are responsible for moving and sensors help to measure a physical quantities. Without actuators a robot cannot perform any practical task. If your robot doesn’t have sensors, then it’s blind. In our case, actuators are two motors for moving of the spider. Proximity sensors help to perceive distance to obstacles."

Posted January 12, 2015 by Chris

"The mobile line follower robot is a type of mobile robot with only has one specific task which is to follow the line made with black tape over the white background or vise verse….What makes this LFR is so popular, I think because of its simplicity and yet it could be used as the teaching tools of how we could implement the industrial standard control system such as the PID control system on this robot."

Posted January 5, 2015 by Chris

"The Automatypewriter is a typewriter that can type by itself. It can also detect what’s being typed on it. It can be used to send text to and/or receive text from a computer via USB. It was designed as a platform for playing interactive fiction games, in particular to play custom software being developed for it by Jim Munroe."

Posted December 31, 2014 by Chris

"Fireworks are dangerous so I want to make this all as safe as I can. I think the best way to do this is to devise an SOP that can guide the design of devices and of the code. You could use this approach of using a standard or safe operating procedure to guide the design of many types of devices."

Posted December 25, 2014 by Chris

"The Micro Framework is one of the newest kids on the .NET block, but it does something really rather wonderful. It brings embedded development within the reach of any C# programmer. If you know C# and love Visual Studio, you can now get started building hardware and controlling it with your software. Moreover, it lets developers achieve one of their most cherished dreams, to control their festive lights using programs that they have written."

Posted December 21, 2014 by Chris

"Last week I finally got time to do a bit of work. I made my own PCB :). I wish I had learned this back in college. It have would saved me so much time. What PCBs did I make? An improved line follower circuit."

Posted December 19, 2014 by Chris

"Have you ever seen videos of those insane Christmas light displays? Those displays are usually controlled by large banks of solid state relays turning on and off each strand to time with the music. I bought a bunch of these relays on eBay and wanted to make my own general purpose controller that I could use in other projects."

Posted December 18, 2014 by Chris

"I wanted to create a truly personalized one without ruin me either. Two ideas immediately came: a microprocessor to control all the lights, but at the cost of a relatively large strand wire, even though the use of crossing wire and diodes, can reduce the number of son, this is not very satisfactory and place a microprocessor per lamp, but until the price of each processor exploded the price of the most basic garlands."