This very complex circuit in terms of the number of transistors was found in Radio Electronics from March 1966. The circuit is for low impedance headphones. The transistors are from the time.
This circuit switches the brightness of the LED. We found it in an English documentation....
The circuit shown in the figure triggers a relay when S1 is pressed, but this only in the absence of...
This astable multivibrator is one of the many configurations that we have in this section and on...