SmallC

 The sensivity of most moderately-priced AM receivers is poor in the mediumwave band. worse yet, selectivity also drops otf sharply within t...

This circuit imitates the sound of wet bugs milling abouthe surface to attract curious fish. The circuit is basically aHartley audio oscilla...

A complete radio AM receiver which requires no battery power at all can be created with a few components. The classic circuit of the well-kn...

You can conduct interesting experiments with this temperature-dependent oscillator. Tone pitch depends upon the temperature of a sensor. The...