This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms output. Input impedance is 1 M ohm.
This circuit uses a piezoelectric transducer to produce sounds like a buzzer. Frequency is...
This circuit can be used to drive relays, solenoids, motors and other loads according the...
This circuit was fond in an old publication of the years 1950. The transistors are germanium types and...