This is for Stu, Mark, Hugo, and Patrick... but mostly Hugo and Patrick.

In my testing of someone else's Empeg this weekend that was having problems with the I2C fan controller I sold him.. I realized I also had the same issue lurking in my empeg. (In fact, hooking my scope probes made the problem occur fairly consistently.)

I was testing the I2C bus with my Agilent MSO6000 and realized (I didn't think of it before) that the pullup on SDA is way too big (100K). So, I made both units use a smaller (5.1K) resistor and both units work great now... I didn't drag out the specs for the CPU as I figured a 1mA pull-up current would be "ok".

I didn't change the one on SCL because it's obvious that line is being driven rail-to-rail... so the 100K is fine for any idle states where the SCL driver isn't set for output.

I wanted to get your opinion as to this change and alert other users in case they have issues with the I2C bus in their Empegs.

-Ben

p.s. I have lots of scope pics in case you'd like to see both before and after the change.