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LM3909 is a monolithic oscillator designed by National Semiconductor , to flash (LED) Light Emitting Diodes.
Packaged in DIP 8 packageLM3909 will operate between -25 and 75 degree .Lm3909 require to work only few components and can be used in many light electrical applications.
Lm3909 can be used in applications like : warning indicators powered by 1.4V to 200V , toys and novelties .
The main Features of Lm3909 are : operation over one year from one C size flashlight cell , bright, high current LED pulse , few external components , low voltage operation ( 1V to 5V ) , low current drain (under 0.5 mA ) , wide temperature range .
As you can see in the circuit schematics the LM3909 Led flasher require few external components and is very simple to do . To choose the components value for your project look in the table bellow .
Lm3909 warning flashlight application .
 
Lm3909 flashlight finder application .
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