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Measure car engine speed RPM via the cigarette lighter [Project]
posted May 27 2014 13:39.30 by spic0m

Ben Krasnow setup his new oscilloscope to measure a car's engine speed by connecting to the cigarette lighter. The inductive kicks from the ignition coil provide a timing signal that can be used to calculate RPM. In this particular car (a DeLorean), the engine fires unevenly by design, so the inductive kicks are not all regularly spaced.

[Link: Ben Krasnow]

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