The figure shows how to use the LM3914 Bargraph with an external reference voltage source. The reference cannot be greater than the supply voltage.
In the figure we have a typical detector stage for a radio receiver. The circuit is from 1963,...
Found in a 1968 Texas Instruments documentation this circuit uses an SCR from that time. Modern...
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...