4 Apr
2019
4 Apr
'19
1:28 p.m.
On Thu, Apr 04, 2019 at 12:18:56PM +0200, David Given wrote:
Provided the E3 and the USB device ran off isolated supplies, you might be able to get away with connecting the 5V (or whatever) on the USB adapter to the GND on the jack. That would cause the logic levels to be interpreted inverted.
I'd have thought that would make the USB dev see the E3's 0V - 5V as 5V - 10V, and the E3 to see the USB's 0V - 5V as -5V - 0V. Which doesn't sound like it helps - am I missing something?
Sean