Found in American documentation from the 1990s, this circuit can generate signals of up to a few tens of megahertz. The transistor must be suitable for high frequencies.
This battery monitor circuit with the TLV379 low voltage operational amplifier was obtained in the...
We got this circuit from Radio Electronics from July 1990. The circuit mimics the sound of the red...
This configuration often addressed on this site is from a 2000 documentation. The circuit can be...