This circuit was found in a Texas Instruments documentation from the 1980s. The circuit monitors engine temperature by warning of engine warm-up and warning when the fan is on.
The purpose of this circuit is to measure the resistance of an antenna at the resonant frequency....
This circuit has been found in older telecommunications documentation. Its purpose is to produce a...
Of course, the range of this transmitter found in a 1992 documentation is not exactly 4 km, as it...