This circuit was found in a 1966 General Electric documentation. The circuit makes use of PUTs that are uncommon components today. Counting direction depends on the programming in A and B.
This circuit was suggested by Motorola in a 1980s publication. It is based on a PUT that is not a...
We found this circuit in an old documentation, using an operational of the time. The circuit...
This circuit uses a pickup coil to take the signal from a telephone line without contacts. The circuit...