In the figure we have a stereo decoder from the 70's with pilot lamp for signal indication. The circuit employs a component of the time, which is uncommon today.
This circuit was found in an Electronics Now of 1988. The circuit is still current, and the power...
This circuit, in addition to transforming a sinusoidal signal into a square, shifts its phase. The...
To operate with high input voltages using a 3-terminal voltage regulator like the LM340-15, we can...