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.
We found this circuit in the 1997 Linear Technology Applications. The components used were common at...
This circuit is from a simple TTL sequential system using 4 LEDs. The experimental circuit must be...
This simple field strength meter is from a transistor book from the 60's. The transistor is made...