Ensemble RXTX--damaged SCR?
- I'm just at the USB power supply stage and can't get 3.3 volts at R10 hole. I do get 5 volts at the lower right of U2 as prescribed.
I've carefully inspected all solder joints and see nothing suspicious...except pin 3 of the scr looks as if it's broken off. Solder does not "climb up" the side of the component as it does on the other pins. I don't have a microscope but with double reading glasses and a good magnifier, I can't see the pin.