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
-- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
Find a suitable rheostat and put it in series with the power leads to the sun. Adjust as needed. :-)
--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]:
Try the download section.
** Posted from http://www.teranews.com **
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.
-- Tim Wescott Control systems and communications consulting http://www.wescottdesign.com Need to learn how to apply control theory in your embedded system? "Applied Control Theory for Embedded Systems" by Tim Wescott Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.