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Using leds as voltage indicators

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whiterabbit

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This project will be the death of me (old age) its taking so long!

I have a couple of solid state controlers which I plan on installing in the same box as light dimmers for two sets of 7, series connected lamps.

What I wanted to do is also install a row of leds for each controller to indicate average voltage to the lamps. I want the leds because they will align with a printed color temp chart for quick reference.

How do I get an led to light at the correct voltage?

I want to indicate average voltage between 10V and 16V in .5V increments.

Thanks for your help, I know this must be a stupid question.
 
The LM3915 has logarithmic (dB) voltage spacing. The LM3914 might be more suitable, as it has linear spacing. Here's the datasheet:

**broken link removed**
 
Thanks

I was not expecting something that so closely meets my needs. Though I dont understand it, now I have my starting point.

cheers

Jp
 
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