This wireless infrared remote sound transmitter is from an article published in the August 1988 issue of Radio Electronics magazine. The circuit can be built using modern, higher-power LEDs.
This circuit, obtained from the component manual used, has an ultra narrow 1 kHz range given by...
This circuit was obtained from a 1977 magazine, but can still be mounted using BC548 for TR1 and...
We found this circuit in an old Radio Electronics. The transistors can be the BC548. The circuit...