This circuit was found in an Experimenters Handbook of the 1990s. The purpose of this circuit is to keep constant the audio signal level of a system, increasing the lower signals.
This comparator circuit was found in the May 1988 Radio Electronics magazine; The power supply does...
In the figure we have the basic configuration of a rectangular oscillator using an operational amplifier...
This project was found in a 1981 documentation consisting of a simple blinker with 2 transistors. The...