old style LED battery voltage monitor v2

122

02:34:24

A very simple battery monitor can be made with a dual-colour LED and a few surrounding components. The LED produces orange when the red and green LEDs are illuminated.
The following circuit turns on the red LED below 10.8v
The orange LED illuminates between 10.8v and 13.2v.
The green LED illuminates above 13.3v
Just adjust source voltage between 9V and 14V. If you want other voltage thresholds adjust the values of zener diodes
Version 2 (versus version 1)  is a little bit complicated but (I guess) is more controllable.

published 3 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.