Recording the sounds of life

Article Abstract:

The plans for the construction of an electronic stethoscope is presented. The key to the electronic stethoscope is the homemade amplifier which helped increase the sensitivity of the lavalier microphone. The amplifier also acts as a filter to reduce the intrusion of extraneous noise.

Audio equipment, Stethoscopes

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A canteen cloud chamber

Article Abstract:

A physics experiment, originally chronicled by Cambridge physicist C.T.R. Wilson in 1896, creates supersaturated air so that particle trails can be observed. Details for building an inexpensive version of the necessary cloud chamber are presented.

Research, Physicists, Ions, Particles, Particulate matter, Cloud chamber, Cloud chambers, Wilson C.T.R.

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Measuring the wind with hot metal

Article Abstract:

Thermal anemometry is an economical technique for measuring wind velocity. This approach uses pieces of metal and simple electronic circuits to measure the degree of air flow.

Measurement, Winds

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