My project board looks great in a dimly lit room, the LED's are nice and bright. In a well lit-up room though, it looks crap.
I'll be putting my board in a transparent perspex case. I wonder is there any kind of layer or coating I can put on the perspex so that the LED's will look bright in daylight?
Use brighter LEDs.
Besides using brighter LEDs and/or increasing the duty cycle (if muxed), the way one normally improves contrast is by using a dark perspex. Look at the front of an older LED sign that uses discrete LEDs and you'll see what I mean.
Tinting it the same color as the LEDs can help a lot.
Best regards, Spehro Pefhany
Find a suitable rheostat and put it in series with the power leads to the sun. Adjust as needed. :-)
Or use LCD. Reflective LCD are better for daylight and/or outdoor viewings.
You _know_ that isn't practical. Think about it -- there's an 8-minute lag for the new light level to get from the sun to you, and with a 66% velocity factor in the leads from the rheostat there's a 12-minute lag going the other way -- that's a 20 minute total lag, which is just way too long.
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