The figure shows how to use the LM3914 bargraph with expanded scale. The circuit has two adjustments determining the extremes of the LED excitation scale.
This circuit is from a Radio Electronics from December 1964. The components are from the time and...
This FM transmitter was described in the Radio Electronics magazine of June 1963. It operates in...
Found in a 1966 American publication, this circuit invert the phase of a low frequency signal. The...