I made this and it works but the pitch is very high, hurts my ears and when button is pushed the pitch goes high very quickly, even if give it a fast push. Used the same values for all parts except i swapped the bc557 to a 2n3906 and a smaller speaker with the same OHM. What am i doing wrong here ? Tried with 9 volts and 12 volt with the same result. What component defines the "pitch" or "frequency" of the sound ?
I now have to try a skeleton build.. Thanks for the clue of how it can be done..👍👍
No problem 👍
Very cool project! I will try to make this.
Luar biasa, kamu sangat cerdas
Thank you👍
nice circuit
I was amazed too by simplicity of circuit,thx 4 feedback
Great video
i must try
Please try it and get fun
Very cool.
Thx man
I made this and it works but the pitch is very high, hurts my ears and when button is pushed the pitch goes high very quickly, even if give it a fast push. Used the same values for all parts except i swapped the bc557 to a 2n3906 and a smaller speaker with the same OHM. What am i doing wrong here ? Tried with 9 volts and 12 volt with the same result. What component defines the "pitch" or "frequency" of the sound ?
Nevermind, solved it by replacing the 22k resistor with a variable one.
Now we need to design a driver to replace the switch.
So can oscillate itself
NE555 😂
The power supply doesn’t say 12 volts?
Yes I run on 7v
how much watts your speaker is using?
The speaker is 10w,the siren output power I dont know
You said it works on 12 volts but you used 7 volt, why is that?
The circuit works great from 6v up to 12v dc
Because at 12 volts is probably too loud 😂