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Technic9 asked a question in ThingM on August 15, 2009 15:08:
Using digital pins to drive alternate i2c busDoes anyone know if its possible to drive an i2c bus with the digital pins on the Arduino? I'm trying to string together many meters of blinkMs and I thought that driving multiple busses would be a way around this. The problem is that even though my longest cable is under 12 feet and works great, it maxes out that bus so no other cables can tie into it. Any comments greatly appreciated.-
Technic9 replied on August 08, 2009 23:49 to the question "Multiple BlinkM I2C/Arduino, several metres?" in ThingM:
Hey Cassiel, would it be too much trouble to explain how you slowed down the clock? I can't find the actual wire.h file, but I'll keep digging around. Also any rough ratios (speed/i2c cable length) would be great to know. I'm working out various cabling configurations for a 5x5x5 blinkM cube (its 4ft cubed in size) So the longest I would ever need to go is 25 ft. If I can get that to work without amping or repeating the signal, that would be great.
Thanks!
Aaron -
Technic9 replied on August 08, 2009 23:02 to the question "Length of I2C bus" in ThingM:
I have a similar issue running 25 blinkMs along a 25 foot I2c bus. Its not working very well and I'd like to use a fast clock speed, can anyone recommend a good I2C line driver chip to make this work?
Thanks,
Aaron
