This circuit was found in Linear Technology Applications of 1997, using components of the time. The circuit transmits video signals bidirectionally over twisted pair.
This circuit triggers a relay when the detected humidity falls below a value. The system can be...
We found this circuit in an old General Electric documentation. In fact, PUTs are not common...
This alarm circuit was found in a 1997 publication. It uses two reed-switches to arm and disarm the...