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, which can be used as a shield, was found in old documentation. The circuit must be...
This circuit uses currently uncommon components, including the 10.7 MHz (FI) filter. This circuit was...
This circuit shows how to use the 4007 MOSFETs in an amplifier stage. We found it in an...