TODO:

- make current draw zero when no cable is connected

v1
==

changes:

- make capabilities more compact
- add interpretation purpose part
- add button for battery usage
- add connector presence test

fixes:

- BC test. I'm not sure what I had in mind but there were too errors: micro-B D- and D+ are shorted on the board (thus no way to detect the short in the plug), D-/D+ on the test would be left floating on plug with BC (thus would not turn the LED on)
- VBUS test. On cables with ground wire, but no VBUS wire (such as A-C cable with not all GND or VBUS pin in C plug), the power ground would pull down VBUS through LED D1A for host A just enough to switch on Q1, lighting up LED D1C LED for host C
- CC test: only for *-C cable. C to micro-B would also trigger it
- and improve a lot of other tests

issues:


v0
==

first prototype containing testers for USB A, micro-B, and C.
not tested yet.
only shows the features, and does not interpret them.

issues:

- BC test is wrong
- shield is detected although there is none (not sure why)
- Rp is detected although there is none (not sure why)
- red LEDs is too bright (1 kOhm current limiting resistor is too weak, 5.1k is better)