We found this circuit in a documentation from the 90's. Information on the A/D converter was not given but types can be used according to the application.
e find this circuit in documentation for radio amateurs of 1974. The unijunction transistor can be...
This simple circuit is powered by the logic circuit itself. Components are still common, although...
Found in American documentation from 1968, this circuit uses both diodes and a neon lamp to...