We found this cable tester in a Popular Electronics from the 90s. The circuit uses a connector according to the cable to be tested. Adaptations can be made for different types of cables.
We found this circuit in an old documentation, using an operational of the time. The circuit...
This circuit generates pulses whose frequency depends on C1. The circuit can be powered by...
This circuit is from the 1994 Linear Applications Handbook by National Semiconductor. The circuit can...