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 sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is...
This basic TTL watch and minute clock circuit was found in European documentation from the 1970s....
This circuit uses a pickup coil to take the signal from a telephone line without contacts. The circuit...