This circuit is from Dutch documentation from 1967. The circuit works with a component of the time, the BRY39, which is uncommon today.
The circuit shown in the figure can be used to detect the operation of infrared sources whose...
This circuit is from a factory manual from the 80s. The circuit can be implemented with more...
This circuit for the logic control of the 555 in a power supply was found in the October 1989...