Stand-alone 555 problem (monostable)
((I bet this question has been answered before and sorry for that, but all previous titles are like "555 help" and i cannot find the answer to that specific problem, i ask for your understanding))
I am using 555 monostable timers for a project, and all of them have output constantly high (1) when the input is constantly high(1), which I think is against the expected responses. If I change the input to (0) then the output lowers to (0) after the expected time and remains so.
Using:
http://www.google.gr/imgres?imgurl=...D4gby98DgCA&page=1&ndsp=30&ved=1t:429,r:1,s:0
From your experience is it broken/burnt or some sort of wrong use of capacitor types/values?
Any help appreciated!
((I bet this question has been answered before and sorry for that, but all previous titles are like "555 help" and i cannot find the answer to that specific problem, i ask for your understanding))
I am using 555 monostable timers for a project, and all of them have output constantly high (1) when the input is constantly high(1), which I think is against the expected responses. If I change the input to (0) then the output lowers to (0) after the expected time and remains so.
Using:
- "CHN NE555N KA6735"
- all with capacitors non-electrolytic (i think ceramic) C=0,01uF
- and some of them with R=270k and C=10uF electrolytic
- and the others with R=3,18k and capacitors non-electrolytic (i think ceramic) C=0,01uF
http://www.google.gr/imgres?imgurl=...D4gby98DgCA&page=1&ndsp=30&ved=1t:429,r:1,s:0
From your experience is it broken/burnt or some sort of wrong use of capacitor types/values?
Any help appreciated!