Re: LED voltage bar graph

On 3月24日, 上午8时25分, mrdarr...@xxxxxxxxx wrote:
I'd like to have a "bar graph" of LEDs tell me how far along my 6V SLA
is on its charging.

I saw this, but I think it's overkill:http://www.national.com/mpf/LM/LM3916.htmlhttp://dan.pfeiffer.net/train/vmeter.htm

5 LEDs would be plenty.

Any suggestions for a discrete version of the LED voltage bar graph?
I'd like to tune it from 6.0V (first LED) to 6.8V (fifth LED) in
increments of 0.2V.

It's not particularly important whether all preceding LEDs are lit, or
if just the Nth LED is lit, if this simplifies the circuit at all.
(For example, if voltage is 6.6V, corresponding to the 4th LED, it's
ok if only the 4th LED is lit, and not LEDs 1 through 4, if this makes
design easier.)

Thanks,

Michael



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