Learn How to Program a 555 Timer for 4 Second Intervals | Tips and Tricks

AI Thread Summary
To program a 555 timer for 4-second intervals, a monostable circuit is insufficient as it only produces a single pulse. Instead, an astable circuit should be used for generating multiple pulses, resembling a clock. Users are encouraged to explore resources like Crocodile Clips for demos on 555 timer programming. The community is supportive and offers assistance for any further questions about 555 timer configurations. Properly utilizing the astable mode will achieve the desired interval functionality.
Shahil
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Hi!

I need to programme a 555 timer pulse with intervals of 4 secs. I've already tried connecting a monostable circuit I found on the net with values of a 36K resistor and 100uF capacitor but what's happening is it's going on for 4 seconds then off for the rest!

Here's the circuit that I tried working - anybody got anything better?? please :shy:

http://www.doctronics.co.uk/555.htm#monostable
 
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You're looking for multiple pulses like a clock? If so, look further up the page at the astable circuit. A monostable is just that - mono for 1 pulse! :smile:
 
Cliff_J said:
You're looking for multiple pulses like a clock? If so, look further up the page at the astable circuit. A monostable is just that - mono for 1 pulse! :smile:

:blushing: :rolleyes:

Hmm...I always thought I was dumb...now u've just proved it! Thanks dude - will get back to you later and I'll tell you if it works!
 
Hey, If you go onto
"www.crocadile-clips.com" there's pretty good demo's on programming a 555 timer programme in monostable operation. But you have to download the free trial.
 
I'm pretty sure there is enough talent on this board to tell you everything you want to know about the 555. Just ask.
 

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