Problem with IC 555

Gunawan W · 13th October 2004, 09:15 AM

Hi,
I have a problem to make it work:
I made a monostable using 555. Is it possible using on/off switch instead of push button to trigger it via pin 2?
What I want is: when I turn the switch on (high=+Vcc), it should not trigger the 555 but when I turn the switch off (low), it will trigger the 555 and makes pin 3 high at certain time before goes back to low (depend on C and R).
thank you in advance for your help.

BlackCatSound · 13th October 2004, 09:44 AM

Look at page 7 of this:

http://www.farnell.com/datasheets/6604.pdf

That should suit your requirements.

Gunawan W · 15th October 2004, 04:57 AM

Hi,
thank's BlackcatSound for your link, I will try it.
anyway, I found another solution before I read your reply from this site:
http://home.cogeco.ca/~rpaisley4/LM555.html
look at: menu #20 circuit #2
It's work.

see you.

13th October 2004, 09:15 AM	#1
Gunawan W diyAudio Member Join Date: Sep 2001 Location: Jakarta, Indonesia	Problem with IC 555 Hi, I have a problem to make it work: I made a monostable using 555. Is it possible using on/off switch instead of push button to trigger it via pin 2? What I want is: when I turn the switch on (high=+Vcc), it should not trigger the 555 but when I turn the switch off (low), it will trigger the 555 and makes pin 3 high at certain time before goes back to low (depend on C and R). thank you in advance for your help.

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13th October 2004, 09:44 AM	#2
BlackCatSound diyAudio Member Join Date: Oct 2004	Look at page 7 of this: http://www.farnell.com/datasheets/6604.pdf That should suit your requirements.

15th October 2004, 04:57 AM	#3
Gunawan W diyAudio Member Join Date: Sep 2001 Location: Jakarta, Indonesia	Hi, thank's BlackcatSound for your link, I will try it. anyway, I found another solution before I read your reply from this site: http://home.cogeco.ca/~rpaisley4/LM555.html look at: menu #20 circuit #2 It's work. see you.

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