Posted March 22, 2015 by Chris

"Sure, this doesn’t use a vacuum tube, but it’s still a neat way to reuse some old-fashioned 7-segment LED displays. OK, so I can’t wear it yet. It still needs a case and watch band.The LED displays are quite tiny and would have been used for calculators or similar devices back in the day."

Posted March 21, 2015 by Chris

"A clap switch is a fun project for beginners. It switches on and off electrical appliances with a sound of clapping hands. Today we will discuss about making a simple clap switch that operates when it detects two clapping sounds in a row. It uses an electret microphone as a transducer for converting a clapping sound into an electrical signal. The microcphone output is amplified by a transistor and is then sent to the PIC12F683 microcontroller which performs an ON/OFF switching action when valid claps are detected."

Posted March 20, 2015 by Chris

"All projects start with an idea. It could stem from a need, a want, a proof of concept or a challenge. In my case, it was a conversation with one of my uncles. He told me about how, during his post-secondary studies, he had the idea to make a thermostat for his final project….I decided I would engineer his original ideal, while incorporating today’s advancements in technology and adding wireless communication with a PC."

Posted March 18, 2015 by Chris

"Our goal in this project was to build a pair of high-speed transceivers that could encode and decode optical signals modulated using Morse code conventions."

Posted March 16, 2015 by Chris

"In some cooking scenarios, it is desirable to achieve a specific object temperature and keep the object at that temperature. However, it is difficult to maintain a constant temperature without constant attention. To aid cooking in this scenario, we created a device that can be added to an electric stovetop or hot plate and serve as an automated assistant."

Posted March 15, 2015 by Chris

" Some extra hardware and software changes the Raspberry Pi into a DVB-S digital TV transmitter. The code and diagrams are released under the GPL license. This project would not have been possible without the pioneering done by Jean-François Fourcadier, F4DAY."

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! "

Posted March 12, 2015 by Chris

"In short, while the laser hits the photo-resistor, the LED is off. Once the laser is blocked, the LED will turn on. –The LED can be replaced with pretty much any additional electronics such as: motor control, solinoids, igniters, alarms, appliances, lighting, cameras or even interface with a computer to further expand possibilities with creative programming."

Posted March 11, 2015 by Chris

"These pages describe my project to build simpler and less expensive amateur seismometers by using microprocessors and other new chips, such as switched capacitor filters. I have tried to provide links to much of the excellent information that is already on the web."

Posted March 10, 2015 by Chris

"Well, that time has come and they are finally finished. However, they look a little rough. I am still quite pleased with the overall product and will most likely be making a second pair. Got the idea from this awesome How-to.."