555 timer
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555 timer

 
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Electrotime



Joined: 29 Jan 2009
Posts: 1
Posted: Thu Jan 29, 2009 1:43 am    Post subject: 555 timer Reply with quote
I want to make a 555 timer do a code 3 patern. Code 3 is patern fire alarms do in the link below.

http://www.youtube.com/watch?v=DXkJV5VK9Ac

Could I have a schematic and some good instructions?
Thanks

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neon



Joined: 25 Feb 2006
Posts: 614
Posted: Mon Apr 06, 2009 10:59 pm    Post subject: Reply with quote
An lm555 is a timer from 1 > usec to hours. I nstruction on how to use this chip is all over the internet. basicaly you need 1 as a astable. THEN 3 MORE RUNNING AS MONSTABLE.Not realy hard to do once you get the timing down.
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