KevinW
Member
I built this simple circuit on a breadboard and it works perfectly but when I soldered the components onto a perf board the same circuit doesn't work.
The 12 volt buzzer just chirps a millisecond and then quits.
I rebuilt the circuit again changing and testing the resistors and capacitors prior to assembly and get the same result.
I have traced everything out over and over checking continuity and all looks good.
The supply voltage is 12vdc.
I'm at a loss as to why it isn't working?
![one shot image.jpg one shot image.jpg](https://www.electro-tech-online.com/data/attachments/111/111563-66775c6d6a1014b8987b90610b9b8cee.jpg)
The 12 volt buzzer just chirps a millisecond and then quits.
I rebuilt the circuit again changing and testing the resistors and capacitors prior to assembly and get the same result.
I have traced everything out over and over checking continuity and all looks good.
The supply voltage is 12vdc.
I'm at a loss as to why it isn't working?
![one shot.png one shot.png](https://www.electro-tech-online.com/data/attachments/111/111560-43357a1e8b037e3598dc4349bfaa5f6f.jpg)
![one shot perf.jpg one shot perf.jpg](https://www.electro-tech-online.com/data/attachments/111/111562-5ad86cf0ae30742cb4ecab1c927739a6.jpg)
![one shot image.jpg one shot image.jpg](https://www.electro-tech-online.com/data/attachments/111/111563-66775c6d6a1014b8987b90610b9b8cee.jpg)