Operating Railroad Grade Crossing Signal

It seems that no matter how much things change, one thing that is always constant is a kid’s fascination with all things trains. When my son was about 4 years old he was fascinated by passing trains. Even more captivating to him was the railroad crossing signals which would flash... Read more »

Software Defined Radio Transceiver

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  • 12/18/2012 @ 11:02 pm

This is an amateur radio transceiver that operates on the medium or short wave bands. It is a software defined radio, meaning that it uses a computer to control the radio, to demodulate the signals received, and to modulate the signal transmitted. The computer control and signals in and out... Read more »

$10 Drawdio

These instructions will teach anyone that reads these how to make a drawdio with spare parts. It will cost $0-10 to make this little noisemaker. All of the parts can be obtained at RadioShack or any old electronics. Read more »

Teacup Stirling Engine

There’s energy all around us, just waiting to be tapped. Whether it’s a hot cup of coffee on a cold day, light from the sun, scented candles, or waste heat wafting from electronics, it’s all potential power waiting to be harnessed! This is the world of the Stirling engine. Have... Read more »