We found this version of the automotive tachometer in a 1980s publication. Variations from other sources appear elsewhere in this section. The indicator is a 0 to 1 mA milliammeter.
This dual balanced modulator configuration was obtained in a 1980s telecommunications...
Of course, the range of this transmitter found in a 1992 documentation is not exactly 4 km, as it...
This circuit can be used to measure the frequency of a low frequency square signal. The signal can be...