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.
The TAA300 integrated circuit is not common today. In fact, the circuit shown is from a Dutch...
This circuit was found in old documentation. PUTs are uncommon components today. The circuit...
This circuit is used in VHF and UHF superheterodyne receivers. The circuit is from the 1964 RCA...