This circuit was found in American documentation from the 90's. The circuit applies to any operational. The power supply can be between 5 and 15 V depending on the operational.
This very old circuit, from a publication from the 1970s, uses a germanium transistor and two...
July 2017 - Mouser Electronics has in its stock the new infrared (IR) emitters from OSRAM Opto...
This circuit was found in a Radio Electronics issue from May 1989. Please note that it may not...