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.
We can use high value electrolytic capacitors in alternating current circuits with the...
In the figure we have the way to use power transistors as rectifiers in a source, replacing common...
This circuit can measure frequencies up to 10 kHz using a digital multimeter or the 7107. The...