hylobates

The 74AHCT125N appears to be a 3v to 5v level shifter

I don’t think the cable adapter is using this particular chip. I see two much smaller ones. Maybe that’s the issue.

To be abundantly clear, is the Blueretro meant to work when only powered by the console? It certainly wouldn’t be as convenient – an extra cable and power block to deal with – but everything is functional when externally powered by USB, yes?

That’s right Blueretro is supposed to be powered by the console alone. When powerd by USB, it is perfectly functional.

Do I understand that your original post is debugging why the console isn’t sufficient to power the Blueretro?

That’s correct.

What I’ve measured so far:

• from the controller port directly: 4.8V
• from the wires inside the adapter without Blueretro attached: 4.6V
• from the wires inside the adapter with Blueretro attached: 3.9V

There are some active components inside the adapter itself, I guess this could explain the drop 0.2V drop.

So is it sagging?

I can respond to at least your second question right now: I can power the Blueretro from USB while on the console that's how I know it is functioning properly when powered properly (my original post wasn't clear enough I guess).

I'll test the voltage while powered on as soon as I can.

:pikachusurpris: