Samer Mohammed has built an optical link that can be used to send audio using an inexpensive laser beam from a laser pointer. Samer has sent in the block diagrams so you can see how the system has been constructed. “This project demonstrates the use of laser in optical communications. the project consists of a transmitter and receiver that will support a one-way communications link between two separate locations. It
Rolo’s electronics projects has an interesting technique for Desoldering an SMD IC with a Candle. This is not the correct way to remove this type of chip, use some hot air instead. He didn’t have any of the proper tools at hand and needed to get his Siteplayer up and running. A trip to the local computer shop scored him some over priced antique computer cards which had the surface
Ray Ho and Ayo Ositelu from Cornell University came up with an inexpensive (around $25) way to do eye tracking. They’re using an IR LED and an IR transistor to get the job done. They note that the best way to perform eye tracking is to use a camera and process the image but this would require more processing power than they had. We have seen eye tracking done
Fellow Canadian Rick Crammond demonstrates how effective shielding is using a fun demonstration. Have you ever stripped some shielded cable and found the foil wrapped around the wires or looked in some electronic gear and seen some some copper paint on the inside of the cover and wondered how effective it is? Well this demonstration shows you that a bit of thin metal can really do some amazing shielding.
The new batch of Cornell University ECE 4760 Final Project are in! There are tons of cool projects as usual, everything from Human Tetris to this MIDI Glove Controller project by Anson Dorsey, Eric Gunther and Jonathon Smythe. The project is based around an Atmel Mega644 microcontroller which has lots of processing capability and all of the projects are developed in WINAVR/GCC. Since the system is outputting MIDI you are
If you need to do some temperature monitoring over a long period of time this is the device for you. It can store 32 thousand measurements and has a current draw of only 50uA. The top picture is version 1 and below is a shot of the surface mount version 2. Via: Electronics Lab “The PIC software is written in assembler and based on earlier projects using I2C interfaces. The
Laser harps seem to be catching on. This one is a work in progress and believe it or not there is no microcontroller or computer controlling the system. For more information have a look at the project page (translated version). “This is my first video showing the sensor-circuit working, that contains 4 opamps (LM358) and only has a +5V supply (no negative supply). You can understand it’s a challenge to
