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Hey who can help me to sort out the problem of automatic school bell with cd4017 and ne 555.
I tried to realize it but it is not working.
Someone tried also!! plz help
Dear friend
Hi
In first step you should try to made a timer with ne555 Ic. then you can give its out put to the Transistor that we have relay in its collector and with this relay you can control your bell as well as. it is very simple . try it if you cant again i will help you with my own circuit.
Best wishes
Goldsmith
If it is that, you already have a bell and need to activate it, then you can set up the 555 as a monostable vibrator and use the output to turn a relay on/off (depending on configuration) to turn the bell on/off.
If you need to make a bell, you can use a 555 to act as a monostable multivibrator that activates another 555 set up as an astable multivibrator connected to a buzzer or speaker.
HeymSir,see what I want to realize ,I already realized it but is causing problems ,today I find one of the circuit burn ,i replace tomorrow I find another one I replace meanwhile it does not work as I want.
See the link of that circuit I want to realize Redirect Notice
---------- Post added at 20:27 ---------- Previous post was at 20:18 ----------
Dear Hamid
See the link from which I find the circuit:
No Tahmid hope you saw the circuit ,my NE 555 configured in astable is giving 4.5minutes which must then go to the second IC2 for giving 45 minutes which then go to activate the school bell ;meanwhile the school bell has to ring every 45 minutes.but it is ringing at 4.5 minutes .I don`t know what to do .help me plz
---------- Post added at 20:42 ---------- Previous post was at 20:32 ----------
No Tahmid hope you saw the circuit ,my NE 555 configured in astable is giving 4.5minutes which must then go to the second IC2 for giving 45 minutes which then go to activate the school bell ;meanwhile the school bell has to ring every 45 minutes.but it is ringing at 4.5 minutes .I don`t know what to do .help me plz
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