This circuit generates a 1296 MHz signal from 100 or 1,000 kHz crystals. We found it in an American documentation for radio amateurs.
This simple tester was found in a Popular Electronics from the 90s. The circuit is powered by two 9 V...
This circuit was found in a PC documentation from 1996. It can be used as a shield with modern...
This limit alarm was found in a 1980s US documentation. Comparators can be equivalent and the...