Good day!
I'm using an atmega2560 clone to run a some switches buttons and a pot. I am getting a lot of ghosting, either two of the switches triggering together as only one of them gets physically moved. Anyone have any rips?
#Issues with ghosting on mega2560 pro micro
worn nova
slate berry
It's bad solder connections/bridged connections. See https://docs.mobiflight.com/guides/soldering/
worn nova
would I need more solder then?
I checked that the pins aren't shorting through each other
slate berry
any time someone posts about ghosted buttons, it's bad solder connections. the doc I linked above shows what good solder joints look like.
I assume it is always the same other buttons getting triggered when you flip one, so look at that connection to see what's up.
worn nova
yeah going to different pins seems to solve it, but doing it as a trial and error thing seems annoying
slate berry
you need to look at your solder joints, preferably under some sort of magnification, to look for bridges
worn nova
I'll take a look thanks!
rigid fern
Yes, I agree with Neil, the most likely way two switches trigger at the same time, barring a short circuit inside your microcontroller, it is for solder bridges to be accidently made between two mega board pins or between adjacent pins in a circuit board. Use a multimeter to test for no continuity between the mega board pins, there should be none.
worn nova
could it be that i'm shorting through flux residue?
slate berry
It's gonna be solder, this comes up often here and it's solder every time.
As Jaime suggested, use a multimeter and test the suspect pins. You shouldn't have any continuity between them. If you do, you know there's a bridge/short somewhere between those two pins
worn nova
Okay will git it a look!
So after testing the pin for possible shorts to the adjacent pins the board isn't recognized by mobiflight anymore, just says compatible and the firmware update doesn't work
slate berry
See https://docs.mobiflight.com/guides/solving-flashing-errors/, specifically #3 and #4
worn nova
See https://docs.mobiflight.com/guides/solving-flashing-errors/, specifically #3...
So this didn't work, but plugging it back in 10 mins later fixed it
guess my multimeter charged the board the wrong way
but I think the post can be closed, thanks for the help!
rigid fern
What about the possible solder bridges?
worn nova
I didn't find any, but changing the pins that I used on the mega solved the ghosting. I'll try to see what I can do with my next boards. Will keep you updated!
grim schoonerBOT
Since this is resolved I'm locking the thread. For additional questions or similar issues please start a new thread in #1028767888242376794. Happy flying!