This may be me but here is the situation I am communicating via the I2C bus to a Devantech SD21 using an Ardunio Mega 2560 If I use the Arduino on board 5 volt and ground everything works ok. If I try to use 5 volts to the SD21 and simply use the SDA/SCL from the Ardunio the sketch hangs, the 1st…

odd issue with Arduino Mega

system October 31, 2012, 8:15pm 5

Thanks,

That resolved the problem. I appreciate the assistance.