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replacing LM3909 with a 555 timer...?

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polag

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lm3909

Need help please...........

is it feaseable 2 use a 555 timer in place of LM3909 to produce oscillations and how do I go about it?
 

wizzz

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replacement for lm3909

hi polag
check this pdf
it will help you
 

polag

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555 timer for led flasher

thanks 4 the post.

I've seen the datasheet 4 LM3909 already. I want to use a 555 timer both as an oscillator and a led flasher. I can't get the cct right...
 

on1aag

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blinking led 555 timer

Hi Polag,

I designed this circuit with the ICM7555 to replace the obsolete LM3909
in a blinking led circuit, or a poor man's alarm system. The circuit was
was designed to operate from a 9 volt battery and to consume as little
as possible. Current consumption is 200 µA and the circuit will continue
to work until the battery voltage drops to approx. 5 volt. No black magic,
I used the charge of the timing capacitor to make the led blink. :idea:

on1aag.

85_1161038770.GIF
 

polag

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lm3909 replacement

thanks. I'll go and try it.
 

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