Indicated for activation by microcontrollers, this circuit was found in the Radio Electronics magazine of December 1987. The MOSFET can be of any type according to the buzzer.
This traditional crystal CMOS oscillator circuit was found in a 1990 Electronics Handbook. The...
This circuit uses only two common transistors and provides good audio power in a speaker. Readers who...
This circuit simulates a unijunction transistor trigger with two bipolar transistors. The circuit...