LED Bargraph thermometer opinion... - Electronic Circuits Projects Diagrams Free

William At MyBlueRoom · 24th May 2006, 02:32 PM

I've attached a photo of a 12 LED bargraph type thermometer, It indicates temperature by color, blue cold, green normal, red hot.

Question

if the display was behind smoked glass it would be hard IMO to tell which of the 4 LEDs in a set was lit. Can you think of a better way to display room temperature at a glance with a bargraph type display.

example

R= red, B= blue, G= Green, A= amber

RRAAGBGAARR (blue being ideal and normally lit while the other leds light above or below it)

DirtyLude · 24th May 2006, 06:31 PM

How 'annoying proof' do you want it? You could always have the 'OFF' leds flashing to show there position and the 'ON' LED solid to distinguish it, or the other way around. Or you could have the 'OFF' leds just dimmer, so you can still see the ON LED's position in the bargraph.

William At MyBlueRoom · 24th May 2006, 11:02 PM

Hmm dimmer, not bad. Trying to match brightness on Red, Green or Blue LEDs is not fun.

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24th May 2006, 06:31 PM	(permalink)
DirtyLude	How 'annoying proof' do you want it? You could always have the 'OFF' leds flashing to show there position and the 'ON' LED solid to distinguish it, or the other way around. Or you could have the 'OFF' leds just dimmer, so you can still see the ON LED's position in the bargraph. __________________ Mark Higgins

24th May 2006, 11:02 PM	(permalink)
William At MyBlueRoom	Hmm dimmer, not bad. Trying to match brightness on Red, Green or Blue LEDs is not fun. __________________ Bill Home of the Firefly PIC Tutor Inchworm ICD2 http://www.blueroomelectronics.com