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Big 7 segment display from round LEDs

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Sobakava

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I want to built big (>20 cm height) 7 segment display from round (3-5 mm LEDs) on a single sided PCB.

Do you have such drawing already?
 

Ante

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You can find it in an EPE article with pcb and everything.

Ante :roll:
 

wpm

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Velleman kit K2567 CA and K2568 CC
 

Sobakava

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I drawn mine 50 and ~30 LEDs per segment. (300 leds in total) how many LEDs should be in a series connected group? My driver can supply required current... (50x10-15mA)
 

Sobakava

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I want to make this display clearly visible on open-air even in the sunny days. My drawing has 28cm height digits and I plan to use bright red LEDs... and 300 LED for per digit... Do you think it is enough or too much?
 

seven_segment

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LED's aren't too great for outdoor daytime use due to viewing angle and brightness, although if you use clear high brightness LED's then you should get away with it. I made a 10 * 10 scrolling LED message display not too long back, I only had 2 days to construct and program it so ended up buying standard red LED's from the local store. Fine for indoor use in dark environments, but impossible to see outside.
 

SPATAN

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You can see in EPE magazine November and December 1999 .
 

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