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23 comments:
where can I place a rheostat in order to lengthen the noise emitted by the speaker? (by R1 or R2 or C1 or C2)
you can fix a rheostat between C1 and the speaker.
Hi, I would like to know the specific functions of each component in this circuit(R1,R2,C1,C2) and why wouldn't a 3V battery source make the speaker sound but a 1.5V Battery source would.
Thanks a million!
Hi, I would like to know the specific functions of each component in this circuit(R1,R2,C1,C2) and why wouldn't a 3V battery source make the speaker sound but a 1.5V Battery source would.
Thanks a million!
yes you are correct.We can use 1.5V to make a sound.Here I have used Q1 and Q2 to amplify the signal which comes from read switch.
can i replace the bc327 with a bc558? please reply soon.
No you cant use that
where can i get a PCB layout for this circuit diagram???
please explain me the working of the entire circuit.......
Read switches are some switches which can activate(on/off)by using magnetic power.Here firstly we give the signal to Q1 But out put power is not enough so we have used the second Q2 to generate the power.then it gives enough power to the speaker.If you have more questions don't hesitate to contact me
in R1=330K & R2=100R what K & R refers to.... and c1 =10nF-63V,isn't it 10micro farad and not nano.. and how the capacitors are useful here... please explain.....thank u...
how can i increase the volume
Hi,
You can use the similar transistor for Q2 which has high out put( high W ).Right now I can remember a number for that but by using transistor data book you can do it easily
can i know the specification of speaker used ?
Hi i was just wondering if you could put a timer in this circuit so that the alarm would not go of straight away but instead after say 5 mins? if so where would you put the timer?
simply I'll give you a method.But this is not a long timer this will work for one or two min.use a capacitor(250uf) to the speaker.
Nice Circuit.......
From we get the read switch and what is the specification of it.?
Srry not from we its from where we get the read switch..ok..
can anyone explain how the circuit work
i m a beginer
thx
Hi, Can anyone say me, why the circuit includes a resistor R2 and capacitor C2? What do they make, please?
can we replace reed switch with limit switch?