I have a MCP23009 IC that I want to use as out put. So far so good, I used it once before as input and the ..17 as output, but... I get a strange result. The LEDs will blink, but only if I connect them anode/plus to the V+ and cathode/minus to the mcp pin This is the source: #include <Wire.h> #in…

MCP2300x behaviour

jopiek April 27, 2012, 8:40am 3

Well, that explains a lot

Thanks!!! So now I just need to rewire the signals...