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Topic: How did this guy daisy chain the tlc5940 over a long wire? (Read 3 times) previous topic - next topic


Nov 12, 2012, 12:16 pm Last Edit: Nov 12, 2012, 12:18 pm by Graynomad Reason: 1
and who needs milliseconds to score a game like cricket !  :-)

A few hours update period should be OK for cricket I would think. Actually in Aus we use modified versions of those devices they use to measure tectonic plate movement.

Rob Gray aka the GRAYnomad www.robgray.com


devices they use to measure tectonic plate movement.    LOL
With my mobile phone I can call people and talk to them -  how smart can you get ?


I have done spi over 10ft at 100khz. If you have issues, it is most likely with capacitance on the line, limited drive or too high of a speed. Using shielded cabling helps and you can always slow down your speed.


You can use RS-485 drivers to get 4000 feet for SPI.

Rob Gray aka the GRAYnomad www.robgray.com


I noticed in the shiftpwm site, there is a "push-pull line driver" for running data lines a long distance.


Somehow I doubt that it has anything to do with shielded ethernet cable, those are a couple twisted pairs of wires with a wrapped shield and drain wire, its not very good shielding. Cable TV type cable has braided shield, that would work good if you really need shielding.

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