Thursday, March 17, 2011

1.5V LED Flasher Circuit by LM3909

This is a very simple 1.5V LED Flasher circuit based LM3909. It is known that LM3909 is an oscillator, a monolithic one, which is designed to flash Light Emitting Diodes (LED). According to the datasheet, it may deliver pulses of 2 more volts while operating on a supply of 1.5V by using the timing capacitor.
1.5V LED Flasher Circuit 1.5V LED Flasher Circuit by LM3909

The LM3909 features low cost, low voltage and low current drain, with a bright-high current LED pulse and wide temperature range. It can be applied on applications such as flashlight finder, siren for toy fire engine, sawtooth generators, emergency locators, warning indicators and etc.

List Component of 1.5V LED Flasher
LED1    : Red LED
C1 : 100uf/16V
IC1 : LM3909
Battery_:_____1.5V AAA

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