OVERSPEED_INDICATOR

Published:2009/6/24 21:56:00 Author:May | From:SeekIC

An op-amp comparator is used to compare the converter output with a dc threshold vol-tage. The circuit flashes the LED when the input frequency exceeds 100 Hz. Increases in frequency raise the average current out of ter-minal 3 so that frequencies above 100 Hz re-duce the charge time of C2, increasing the LED flashing rate. IC = LM2907 or LM2917



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