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Arduino Forum Searching for parts LARGE 7 segment displays
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  • sports_technology
  • led
  • electrical
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Related

Searching for parts LARGE 7 segment displays

Former Member
Former Member over 14 years ago

I'm working on a clock to be run off an arduino. I have most of my hardware down, including an LED controller chip, an RTC breakout board, etc. I have hooked up some 7 segment LEDs and am working on the code, but I have one big problem:

 

My project calls for very large displays. specifically, I'm looking to match the displays here, which look to be 7" (5.25" character height) dual character displays. they also interestingly have commas in the corner (instead of the decimal point on most 7 segment displays).

 

I've looked on various sites (octopart, jameco, many many more) but so far havent come up with many options. I found a 7" single character on sale at a couple sites (including element14), but it isn't a great match. I know there must be more variety made, as I see these all the time for scoreboards and such.

 

Does anyone know where I might find these displays?

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  • johnbeetem
    johnbeetem over 12 years ago +1
    Every large 7-segment LED display I've seen uses rows of normal-size LEDs for each segment, probably hooked up in series and driven through constant-current voltage-boost LED drivers. You can use plastic…
  • Catwell
    Catwell over 14 years ago

    It might be custom to the people who built the display.

    But since you are making everything yourself, turn the decimal point into a comma. Make a plastic comma to put over the LED in the decimal point, is a simple way. Or a mask to go over the display.

     

    Large displays

    Try the KINGBRIGHT - SC40-19SRWA - DISPLAY, SEVEN SEGMENT, 100MM, RED

    It is about 4" tall.

     

    Or try this one.

     

    Cabe

    http://twitter.com/Cabe_e14

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  • Former Member
    Former Member over 14 years ago in reply to Catwell

    The robotshop one is the one ive found that really fits the bill, but its still not close enough for my liking.

     

    I just keep getting the feeling im missing some industry supplier or something, because I know there are plenty of these displays around.

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  • tronixstuff
    tronixstuff over 14 years ago in reply to Former Member

    How about larger? Say 12" - http://evilmadscience.com/productsmenu/partsmenu/107-sevensegment...

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  • fustini
    fustini over 14 years ago in reply to tronixstuff

    Wow!  That's impressive.  Powered 60 LEDs.

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  • Former Member
    Former Member over 14 years ago in reply to tronixstuff

    The EMSL ones are a tad too big (though they look awesome).

     

    I also saw a guide by EMSL where they made their own 7seg display, but im considering that a last resort.

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  • Former Member
    Former Member over 14 years ago

    I would consider making your own diplay. It would be a bit of work, but I think in the end more cost effective. You can get tons of LEDs off of eBay for dirt cheap and probably find some parts at Michaels for encasings. How big do you want it, how much are you willing to spend and how clean do you want it to look?

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  • Former Member
    Former Member over 12 years ago

    Hi Mister Glass,

     

    Did you find the display that you were looking for?

     

    If so would you share were you got it? I am building an electronic ping pong score board and in terms of hardware I just need the large displays.

     

    Thank you!

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  • johnbeetem
    johnbeetem over 12 years ago

    Every large 7-segment LED display I've seen uses rows of normal-size LEDs for each segment, probably hooked up in series and driven through constant-current voltage-boost LED drivers.  You can use plastic bars to diffuse the LEDs so they look like continuous segments.

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  • goldenshuttle
    goldenshuttle over 11 years ago in reply to johnbeetem

    John idea works all the time. You may also abrase (file) strip shapes on a plain acrylic board to create 7 segment(or any other shape) then light each strip with one LED embedded .this works well if you get single high Lum LEDs, performs very well except in high glare surrounding.

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  • Problemchild
    Problemchild over 10 years ago

    either use a section of strip per "segment" of the display or a string of real LEDs .

    You'll need a Fet of some type to switch each ofthe segments as the arduino Logic won't be able to drive all those LEDs on its own.

    Using this method you can have displays as big as you like image

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