ZERO_POWER_ENGINE_TACHOMETER

Published:2009/7/16 3:22:00 Author:Jessie | From:SeekIC

Requires no battery or other power source. Coil from 10 K relay serves as pickup for mounting near rotating magnets of flywheel of outboard motor or magneto. When rotating magnets are not available, as in most automotive engines, variable-reluctance pickup is used. This can be mode from old loudspeaker, mounted so fan blades of generator pass between pickup coil and permanent magnet. Coil mounting should be aluminum to maintain calibration that is made with commercial tachometer.-K. M. Bronscome, Engine Tachometer, EEE, 10:9,p 27.



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