We found this circuit with the LM3914 IC in a Radio Electronics magazine from June 1985. The circuit is intended for monitoring the battery voltage through an LED bar.
This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit...
The circuit of the figure serves the same purpose as the previous one (CB5057E), but has a...
The oscillator in figure 1 can be used in alarm, call or warning systems, producing a sound of...