Have you ever wanted to find out how strong a magnet really was, or how the strength of the magnetic field varied as you changed the distance from the magnet. Devices used to measure the local magnetic field are called magnetometers or gaussmeters. There are commercially available meters for this, but they are usually a →
When I was a kid, there was a periscope you could make out of a cardboard tube and two small hand mirrors to see around corners. Now there’s a video camera system that can do the same. Camera Can See Around Corners and Femtosecond Camera Sees Around Corners articles tell that Scientists at the Massachusetts →
If you have a simple Arduino project that uses only a few pins, you might be able to shrink it down to a single 8-pin ATtiny chip. How-To: Shrinkify Your Arduino Projects video and How-To: Shrinkify Your Arduino Projects article shows you how. The best part is you can use the same Arduino code and →
I have earlier written about a tiny Tetris. Not is time for a big Tetris. At MIT, fun is accomplished with architecture. Hackers turn MIT Building into Tetris Game. MIT hackers have, for some time now, considered playing “Tetris on the Green Building” to be the mother of all MIT hacks because “the side of →
A Web server needs to support concurrency. The server should service clients in a timely, fair manner to ensure that no client starves because some other client causes the server to hang. Three Ways to Web Server Concurrency article tells that multiprocessing and multithreading, and hybrids of these, are traditional ways to achieve concurrency. Node.js →
I have updated three popular documents at ePanorama.net: Powering microphones document is updated with cleaner drawings of electret mic to XLR adapter circuits. 3D glasses and other 3D display devices has completely rewritten introduction to 3D glass technologies. This has been a document that has been viewed very often in the site and I felt →
I bought USB Virtual 7.1 Channel External Sound Card Adapter to build a cheap PC based digital storage oscilloscope. Sound card based oscilloscope is not new to me, I have used it sometimes. There are many free oscilloscope software that you can use. For example “zeitnitz” is a very fine program! Using an external USB →
Given the schematic for a simple circuit, make it a real circuit with the base components, some conductive thread, and a 3D printer. No solder, no etching chemicals, no sending away for anything. 3D-Printed Circuit Boards, for solder-free printable electronics Instructable is to serve as the how-to guide for a 3D-printed electronic circuit library implemented →
I got CYPRESS SEMICONDUCTOR – CY3269N – KIT, STARTER, LIGHTING DEMO from Farnell for testing. CY3269N Lighting Starter Demonstration Kit is designed to showcase two Cypress technologies: EZ-Color High Brightness LED Controller (tunable white light control, color mixing) and CapSense (capacitive touch sensing). Data sheet says that this kit illustrates how an intuitive GUI lets →
Star Wars Day: May the 4th be with you article tells that 35 years ago in a galaxy far, far away, Star Wars was about to hit theaters on May 25, 1977… Fast forward and fans have unofficially dubbed May 4 as Star Wars Day, terming “May the 4th be with you” as its slogan →