This 2-quadrant modulator circuit was found in the May 1988 issue of Radio Electronics magazine. The CA3080 is an OTA operational amplifier.
The basic idea of the circuit shown in the figure is to increase the brightness of an ordinary...
With the appropriate choice of C1 and C2 it is possible to divide the frequency of a rectangular 3 V...
This circuit was published in a 1979 magazine, but it can still be easily assembled as the...