We found this circuit of a transistor siren in a recent English publication. All components are still common and the circuit can be changed to have a power transistor on the output like the TIP32 and run on 12V.
We found this circuit of a transistor siren in a recent English publication. All components are still common and the circuit can be changed to have a power transistor on the output like the TIP32 and run on 12V.