[bskrobisz]

I'm sure that those with a lot more hardware experience than me have the intuition to make guesses like this but I was surprised at:

>You have to register to download the HDMI spec which is more effort than I have for this, but the Hot Plug Detect pin has a pretty descriptive name. I guessed that this either has to be pulled up or pulled down to signal that a cable is connected. Sticking a 20K resistor to the 5V pin seemed to do the trick. With the oscilloscope, we can now see activity on the SCL/SDA lines when it's plugged into the laptop.

Is it really not that concerning to just guess what amperage will/won't fry something? I mean, you could test from very high resistances downwards, but you might overshoot, right? Or is there an assumption that the hardware on either end will provide the appropriate resistance, in this case?