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.
This circuit, from a publication from the 1970s, can be implemented with more modern transistors and 6 or...
This plug-in control was found in General Electric documentation from the 1970s. The SCR can be...
This circuit is of an old Argentine magazine of the 70's. The difficulty for its assembly is in...