This transmitter for the 3.5 and 7 MHz ham radio was found in a 1950s Japan publication. No information was given on the coils and the power supply.
This new AMS device consists of a digital color sensor and proximity sensor that also incorporates an infrared...
This amplifier was found in an old publication of 1990. With the changes, it may still be...
This circuit was found in a May 1981 Radio Electronics magazine article. The circuit is offset...