Found in European documentation from the 1980s, this circuit was originally designed for computer applications of the time. However, the basic idea can be adapted for use with microcontrollers.
Found in a QST magazine from the 90s, this powerful unit is intended to supply a VHF transceiver for...
With the precision given by the crystal this circuit provides signals of several frequencies for the...
This circuit was found in an American documentation from the 80's. The components are from that...