This transistorized stage has a high gain, being adjusted by VR1. The circuit can be used as an excellent audio preamp. We found this circuit in a 1996 English publication.
This signal attenuator was suggested by Electronics Now magazine in April 1999. The circuit is...
This common metronome configuration has already appeared in several of our articles and projects. This...
In the figure we have a circuit with two operational amplifiers 741 capable of doubling the...