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 basic configuration can be found in a lot of articles on this site. In this case, the relay...
This circuit was found in a 1997 publication, but it uses few common components and is very...
This circuit prevents the passage of frequencies in a range starting at 1 kHz and can be adjusted...