does anybody know where can i buy or who manufacture a 7 segment display size 4"? i found on the net only smaller sizes.

thanks

 

Try Farnell http://www.farnell.co.uk although as you measure in imperial units i assume that you are not in europe - but i think they can deliver worldwide. Over about 75mm the 7- seg displays i've used are made of discreet leds, I've even made a 250mm display with Leds a
and counter chips on perforated strip board - good fun too

 

Hi,

Another possible vendor is: http://www.qkits.com/, specifically the page:
http://www.qkits.com/serv/qkits/qkitscat/catalog.asp?Page=1&ccat=LED

HTH,

Mark Watson

 

Electronic Express:
http://www.elexp.com/opt_0165.htm
2.3" at $4.20ea
4" at $8.90ea
5" at $12.95ea
they have PDF spec files on these
I'm not affiliated with them.

good luck
have fun

vladimir