As long as it can be disabled or changed to visible only, sure. Blink codes are actually REALLY nice, as they offer much more potential for information. Assuming that the average person can track, say, 3 digits of up to four choices each (i.e., one blink to four blinks, with along off period marking "digits" and a long off period marking "words"), you give yourself 3^4 possible error codes- 81 opportunities to tell the user how they screwed up. Just be aware that, if you make something with an RGO LED and try and encode information that way, fully 15% of the European descended males who work with your product will be confused, disheartened, and very, very peeved with you. Mike H. On Feb 8, 2008 5:39 PM, Mike W wrote: > The 'bell signaling' system used in the Cornish tin mines worked very well for > over 30 different underground signals.. Why not incorporate a piezo and use a > similar system. Even mobile phones use Morse.. SMS in Morse code when you > receive a message. No need to keep looking at the equipment for when it wants > to warn / inform you. > > > On 8 Feb 2008 at 23:10, Steve Howes wrote: > > > >> How about blink-codes? > > >> > > > I dislike blink codes. > > > "Fast blinking = X > > > slow blinking = Y" > > > > > > well is that flashing there fast or slow? > > > > 1 flash for error 1.. 2 flashes for error 2.. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist