Yatao Li

thanks, that clarifies things. > I rewrote the low level interrupt routines, added support for the OLED display and so forth. yeah I was watching and felt really happy about...

1.02 is a nobrainer for me because of 20 expansion pins:D

About the buttons: The closest button switch I can find around here is MEC 3FTH9+1T16 -- quite expensive (4xbuttons, the most expensive part in the BOM list other than the...

I decided to buy enough 3FTH9 as fallback. The PCBs have arrived and it might be possible to make a few "adapters" to try. Cherry switches may be a good...

Ok I'm half way there. Passed sram & button tests. Then I proceed to install a socket for OLED (pluggable) and wrote some tests for it. The results are puzzling:...

will submit a PR for my OLED test firmware. also I think we'd better make a note that the test sketches should be run against standard arduino core.

I've done some tests with a breadboard, got the same behavior. pulled off HC4050 and connects everything directly to 5v, and now it works like a charm. O.o

yes. aggregating the test results, and to minimize hacks on MegaCommand, I'm now trying to add back the level shifter, but cut 3v3 power supply to OLED -- instead give...

here's the link: https://item.taobao.com/item.htm?spm=a1z09.2.0.0.11e92e8d1NyZQG&id=564748067500&_u=g1j65cac743 the specs inform that the logic pins tolerates up to 3v3, but power source can be 3.3~5v. I tried the method (only re-wire the power source...

thanks a lot! I think I'm getting close! :) no, the display is quiet. I can hear slight "zzzz" sound (switched regulator?) when I stick it to my ear :D