Found in documentation from the 1970s, this circuit uses an oscillator and a display to warn of speeding. The circuit applies to cars with contact breaker.
In this circuit, from a 1977 publication, we have the traditional version of a filter that rejects 1...
The integrated circuit used in this application is uncommon today. However, the basic...
This physical line servo control uses components that are not currently common. The circuit is from...