This 3-transistor buzzer or buzzer is a classic type found in the July 1998 issue of Electronics Now magazine. The power rating depends on the output transistor.
The presented circuit uses two old germanium transistors. We found this configuration in a...
This circuit is primarily intended for the calibration of common radio IF steps using the...
This 3-channel transmitter for amateur analog TV from 902 to 908 MHz was found in a QST magazine...