KJ6ETL
The rotary encoder seems to be working, but there may be a lead connection problem.
The "A" and "B" leads on the encoder do a phase dance to tell the software which direction
the shaft is being turned.? You can see this with your voltmeter if you monitor the A-lead
while slowly turning the knob and then monitor the B-lead while slowly turning the shaft.?
Both connections should change back and forth between ground and approximately 5
volts.? If either A or B phase is stuck high or stuck low it can cause the software to not
understand that the shaft is bring turned.?
Pushing the knob inward closes the normally open push-switch and causes the software
to step to the next menu item, and indicates this by a change in the display.? When you
monitor the push-switch leads on the encoder you should see one lead permanently at
ground and the other at approximately 5 volts, going to ground when the switch is activated.?
Any discrepancies in the above measurements would indicate that something is either
shorted or not connected properly between the rotary encoder and the Arduino board.?
I know that these are very basic tests, but they need to be performed as a prelude to
going further with the troubleshooting process.?
Next step(s) will involve digging a bit into the schematics, connection drawings, and
possibly into the software itself.? If necessary I can open up my own uBITX and do
some comparisons to see what is different between my rig and yours.?
Arv
_._
