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FLASHING_LED_IS_REMOTE_MONITOR

2017-02-05 01:17  
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FLASHING_LED_IS_REMOTE_MONITOR
Circuit uses National LM3909 flasher IC to drive LED for monitoring remotely located high-voltage power supply. When 43K dropping resistor is located at power supply, all other voltages on the line, IC, and LED will be less than 7 V above ground, for safe remote monhoring. Use any LED drawing less than 150 mA.-P. Lefferts, Power-Miser Flasher IC Has Many Novel Applications, EDN Magazine, March 20, 1976, p 59-66.