This circuit mimics the trill of a bird. We found it in an American documentation from the 90s. It is based on the LM3909 integrated circuits.
This simple telephone amplifier can be used as an auxiliary amplifier for additional listening, without...
This circuit can be used in fiber optic links or even direct links to microcontrollers and other...
This article was obtained in a French magazine Nouvelle Electronique from 1994. It can be easily...