This timer, like the previous circuits, uses a currently uncommon integrated circuit. The time is given by capacitor C1 and R2 which has the range of values indicated in the diagram.
This simple teaching circuit uses 5 transistors in a monophonic organ version whose notes are...
We found this circuit in documentation from the 80s. The circuit is for cars with platinum. The...
This circuit for the medium wave range was published in Radio Electronics in February 1958. The...