modified 2 years ago

old style LED battery voltage monitor v1

02:27:15

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

published 3 years ago

Cameron1979

3 years ago

Hi Nordistu, this is great. how would you turn one one LED using a tactical switch? eg. 1 push on, 1 push off?

nordistu

3 years ago

sorry for late response..... for your question please do a search in 'Comunity' for a 'simple circuits' ..... there are 6 circuits with leds..... the fourth circuit is your answer..... play with all circuits, it's fun 😁

nordistu

3 years ago

@Cameron1979.... I can't send you a direct link...... this is a problem in this platform

nordistu

3 years ago

@Cameron1979.... see my circuit "Soft latch on-off..." This circuit is draw from EEVblog

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