[Example 41.1] Hello, I've trying to test my I2c expander chip (mcp23017) I came across this Tutorial: Maximising your Arduino’s I/O ports with MCP23017 | tronixstuff.com tutorial. Now I've wired up the expander as described in the article with the of the 4.7k resistors on the Ic2 line,…

[Tronixstuff] MCP23017 | I2C Port | Help wanted

macegr May 3, 2012, 5:07am 11

Was the problem that the breadboard power rails were split at the midpoint?

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