Found in a 1965 Electronic Design, this circuit divides the frequency of a cascaded signal using unijunction transistors. The bipolar transistor supports an equivalent. The shock is 470 mH.
We found this circuit in a documentation for radio amateurs from 1977. The circuit can be changed to...
The circuit shown, for reading perforated paper or the presence of paper, was suggested by...
This circuit was found in a NASA documentation from the 1980s. The components used are of the time...