This circuit with a dual power supply generates sinusoidal, triangular and rectangular signals. We found it in the magazine Electronics Now of January 1996. The frequency goes up to a few megahertz.
Using an integrated circuit that was available at the time, this circuit produces animal sounds such...
The idea of this circuit is to obtain a resistance of 10G ohms using an operational amplifier....
This circuit, when it picks up a sound, emits a beep and records for a while the sounds picked up by a...