Probably technical, not due to colorblindness since that's usually due to the red and green receptor crosstalk. The blue should still have good contrast. Check the specs- the blue might require a lower voltage than the others.
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I would select neighboring colors for high contrast so that the "jump" is distinct. You might also distinguish northern from southern with, say, reddish vs greenish hues.
Easier said than done, though! I look forward to seeing the finished product.
Bill
-----Original Message-----
From: jolt...@gmail.com
To: decatu...@googlegroups.com
Sent: 2017-11-03 8:42:00 PM
Subject: Re: [decaturmakers] Heh. HMC5883L R00LZ
Probably technical, not due to colorblindness since that's usually due to the red and green receptor crosstalk. The blue should still have good contrast. Check the specs- the blue might require a lower voltage than the others.
On Nov 3, 2017 8:35 PM, "Charles Shapiro" <hooter...@gmail.com> wrote:
--Demo ( http://tomshiro.org/compass_rose_72_degrees.mp4 )Spent a few hours today HAX04ing up the next Amazing Arduino Project. It'll feature an RGB LED which changes color depending on the direction the device points. Propers to Adafruit for their most excellent sensor driver framework, which makes working with the HMC5883L compass chip easy.Picture ( http://tomshiro.org/compass_rose_prototype.jpg )
The final project will use a Pro Mini and have some fun pretties around it, but this is the prototype circuit loaded with a first draft of working code. It changes colors at 72 degree ( five colors) intervals. Experimenting with how many different shades and colors I can actually see clearly is next on the agenda. I'm using PWM outputs on the Arduino which go 0-255 on each color, but so far all I see is white if I go full volume on the green and red and add even 10 units of blue. Perhaps I should enlist someone who is less colorblind?-- CHS
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