This circuit is from the time when slide projects were used. We find it in a 90's Wels’ Think Tank. The lead times can be adjusted from 5 to 30 seconds.
Used in audio circuits in the excitation of output stages, this circuit provides audio signals with...
This interesting configuration uses two speakers as a load to have a push-pull excitation with...
This sweep generator or current-controlled oscillator was found in Popular Electronics from...