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Pretty good, considering that this is not including trivia, which is lame and I think can be deleted.įor my current need this is fine, especially as I intend to use Processing to update the sign anyways, and therefore as the memory. With 26 pages, that makes room for 26,624 characters roughly. The sign only accepts commands up to 1,023 bytes in length, minus packet headers leaves room for 1016 characters.
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Connecting the wrong way should not damage anything, but snapping them into the female connector makes it trickier to change around if you have the pin-out wrong. If you are using a cross-over cable, then you will be connecting green to pin 2, red to pin 3, and yellow to pin 5.Ī little hint for construction if you are unsure is to connect the pins directly to the male port (on your computer or an extension) to test until you are satisfied that you have it right. The red wire will go to pin 2, and the black wire will go to pin 5.
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If you are using a straight-through cable, connect the green wire to pin 3 of the DB9. Communication Wire ConstructionĬut one end off of your telephone extension, expose enough wire to work with, and strip the four ends.Ĭrimp-connect the pins that came with your DB9 connector onto each of the exposed wires. You can make your cable either way, just reverse the connections from mine if you are using a crossover cable. If they line up, you are holding a crossover cable, otherwise it is straight-through. You do this by holding the cable end to end, tip to tip, and seeing if the colours line up or not. First you need to identify whether your phone wire is straight-through or crossover.