I was considering installing LED displays in our factory to display production rates, but found it was easier and cheaper to use flat screen TV's, a PC and an OPC server. I wrote my own OPC client to get and display information from the machines on the shop floor and then realised I could write the information to a database and publish it on the company intranet.
Big brownie points
Al
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If you remain calm while all those around you are losing their heads, then you haven't realised the seriousness of the situation