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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Monday, April 21, 2008 04:18 AM


Battery Monitors  Flashers & Blinking Circuits    Oscillators:  Astable Circuits

Also see Circuit in DiscoverCircuits'  Hobby Corner

THREE VOLT LOW BATTERY VOLTAGE FLASHER
This circuit is designed to monitor two alkaline cells (3v) that form the battery often used in portable electronic equipment.  It use an inexpensive IC from Panasonic that is connected to an efficient LED flashing circuit.  When the battery voltage drops below a certain point the circuit flashes the LED.  In the off state the circuit draws only 1uA, while in the active flashing state it draws 20uA.   Published in EDN, Jan 2, 1997

Click on Drawing Below to view PDF version of Schematic

Under Voltage LED Flasher designed by David Johnson, P.E. (Dec 24, 1998)

Astable Oscillator Circuits    Battery Monitors    Flashers & Blinking Circuits   
Master Schematic Category List - David A. Johnson, P.E.
 

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