The figure shows how to use the LM3914 Bargraph with an external reference voltage source. The reference cannot be greater than the supply voltage.
This circuit was found in the April 1983 issue of Radio Electronics magazine. Its purpose is to...
Evidently, this is a project that still needs some improvements. For example, the ignition can be...
This very low voltage regulator for 3 V input (2 batteries) was obtained in a documentation from...