This circuit was featured in the March 1972 issue of Radio Electronics magazine. It adds automatic gain control to turntables by acting directly on the cartridge signal.
This circuit was found in a 1980s documentation for amateur radio. The circuit is for 9 MHz...
This circuit generates a linear sawtooth signal. The circuit was found in the December 1992 issue...
I found this simple basic circuit of rhythmic light in a 1980 documentation. We warn you to be...