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, which appears elsewhere on this website, was obtained from 1967 General Electric...
This circuit can be found elsewhere on this site as part of alarms or sirens. The circuit given is...
This circuit is intended for charging 12 V Nicad batteries, which corresponds to 10 common...