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.
We found this circuit recent English documentation. The circuit uses a common transformer and can...
This 90's Electronic Design circuit converts the period of a signal into a frequency. The...
This circuit, shown in the figure, can operate from 4 to 100 MHz, based on a 2N2222 transistor or...