Dear Ben,
I would love to make something special for the non professional soccer team my son plays for.
How difficult would it be to create a large (7-segment led ?) display the coach could use to call for players' substitutions during a match?
Design requirements:
-to have two pair of 2 digits separated by ":" (first pair red, second green)
-to be big/bright enough to be readable from 30 yards/meters in sun light
-to use self contained energy (a battery I suppose)
-to be portable, light and sturdy in the same time
-to be low cost
-to be easy to operate
Thank you in advance,
Carlo
