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 was found in a Modern Transistor Workbook from 1965. The circuit sends signals from a...
What this interesting circuit does is to warn that a note written on a paper has been removed and...
This transmitter with counterphase oscillator was obtained in a documentation from the 90s. The...