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.
This circuit controls current heating elements according to the power transistor used. The sensor is...
This circuit was found in an 80's American documentation, serving only as a reference and not for...
This dual adjustable power supply was found in the June 1990 issue of Radio Electronics magazine....