This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the delays obtained when the circuit is connected according to the positions of the selector switches.
This receiver for the AM band with 6 transistors was manufactured in the 60's in Japan. The power...
This current control for DC motors was found in documentation from the 1970s. The current depends on...
This circuit operates according to the same principle as the previous one, but it has a difference in...