Found in a 90s Popular Electronics, it serves both TTL and CMOS logic. The injector can provide 10 kHz or 100 Hz signals. The circuit drives a transducer and two LEDs.
This circuit generates a 1296 MHz signal from 100 or 1,000 kHz crystals. We found it in an...
This circuit generates three outdated signals whose frequency is given by the time the signals...
This circuit was found in the April 1971 Radio Electronics magazine. The 100k resistor can be...