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

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Discussion Overview

The discussion centers around programming a 555 timer to produce pulse intervals of 4 seconds. Participants explore different circuit configurations, specifically comparing monostable and astable modes of operation, and share resources for further learning.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested, Homework-related

Main Points Raised

  • One participant describes their attempt to use a monostable circuit with a 36K resistor and 100uF capacitor, noting that it produces a single 4-second pulse followed by an off period.
  • Another participant suggests that the user may be looking for multiple pulses and recommends the astable circuit instead of the monostable configuration.
  • A participant shares a resource for programming a 555 timer in monostable operation, indicating that it requires downloading a free trial.
  • One participant expresses confidence in the community's ability to provide information about the 555 timer, encouraging further questions.

Areas of Agreement / Disagreement

Participants generally agree that the monostable configuration is not suitable for generating multiple pulses, but there is no consensus on the best approach or configuration to achieve the desired outcome.

Contextual Notes

Participants have not fully resolved the specifics of the circuit configurations or the implications of using different components, and there may be assumptions about familiarity with the 555 timer's operation.

Who May Find This Useful

Individuals interested in electronics, specifically those looking to understand or implement 555 timer circuits for timing applications.

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
 
Last edited by a moderator:
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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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