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Wireless Power Transmission Science Fair Project

Posted June 28, 2015 by Chris

"Jamison wrapped a second coil and we hooked it up to a green LED. Connect the power, move the coils close together. First light! Yes!! Now it was time to improve Jamison’s project. We tried a full-wave rectifier to increase the LED’s brightness, with not a large (if any) effect. We built a two-stage Cockcroft-Walton generator, with much better success."

Wireless Microphone Antenna Distribution on a Budget

Posted June 23, 2015 by Chris

"In continuation to my previous post, I will start discussing how I solved the wireless distribution at my church in an economical way."

Double Helix Jacob’s Ladder

Posted March 24, 2015 by Chris

"This week I built a Jacob’s Ladder in a double helix shape! It only takes a neon sign transformer, a block of wood, and some copper tubing."

Solid State Tesla Coil 1

Posted March 14, 2015 by Chris

"While the initial goal of this project was to learn about the basic workings of a SSTC before embarking on a DRSSTC, SSTC 1 performed spectacularly and can be modulated via fiber-optic in a variety of ways, from producing sword-like spiral sparks to playing music via an analog stereo input! "

Open-Source Quartz Crystal Microbalance

Posted February 25, 2015 by Chris

"OpenQCM is a highly sensitive microbalance with a wide range of applications in chemistry, biology and material science. The sensor is a surface sensitive quartz crystal capable of measuring phenomena at molecular scale. It works in vacuum, air and liquid environments. OpenQCM is an open hardware project with Arduino inside its heart. It’s a scientific as much as a friendly device very quick and easy to use."

Converting ATX Power Supply to Lab Bench Power Supply

Posted January 24, 2015 by Chris

"Small tutorial on Computer ATX Power Supplies. How to use them, how to connect them in series, in parallel. What is 12V rails? Is it possible to connect 12V rails together? ATX connector wiring explained."

Mini Portable Power Supply

Posted January 22, 2015 by Chris

"I did this project to make myself a portable power supply I could bring around to test certain broken equipment which requires fixing. It is handy to be able to bring around a variable power supply such as this than to look for a suitable battery to power it up."

Homeopathic Radio Engineering

Posted December 13, 2014 by Chris

"A transmitter location on the east coast of the USA was used. The tests were conducted on HF radio frequencies on and around 6925 kHz, using a state of the art solid state transmitter with a standard off the shelf MOSFET as the RF final amp. Each monitoring post was equipped with the highest quality HF receiving gear and highly sensitive monopole receiving antennas….The results of the experiment clearly speak for themselves, as transmitter power went down, the signal strength went up."

Linux Analog to Digital Converter via Parallel Port

Posted November 30, 2014 by Chris

"It can be a little expensive to read analog signals, for example temperature readings or light levels, into your computer. In this article we will show you (1) how Linux can use a computer parallel port and a $10 integrated circuit to read 8 analog channels at 12 bit accuracy, and (2) how we used this to build the Extreme Comfort System."

Active Wideband Receiver Antenna for SDR

Posted October 17, 2014 by Chris

"Software Defined Radio (SDR) has finally reached a much broader mass of people, who wanted to play with RF technology, but didn’t find the time or resources to learn all necessary skills, to build a hardware based radio. Thanks to the work of the GNU-Radio and OsmoCom developer crowd, this barrier is finally gone and everyone can, more or less, directly access, what the antenna receives."