Author Topic: [GB] Melody96 Type-C + QMK  (Read 222784 times)

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Offline mtt

  • Posts: 1
Re: [GB] Melody96 Type-C + QMK
« Reply #700 on: Thu, 26 July 2018, 13:52:30 »
Got some weird issue with my board.

The majority of the underglow LEDs cant be controlled most of the times (It very rarely works).

E.g. FN Q > turns on underglow LEDs. If I press it another time, only half of the LEDs turn off  (see attached picture). Same goes for every other command - such as FN E to change the RGB modes. Only a part of the LEDs react. I asked Vincent already but I haven't heard back yet.

Maybe one of you guys know whats the issue here? Is it QMK?

I have reset the EEPROM and reflashed the default hex a few times already to no avail.

Any help is much appreciated  :D

Offline masterhail

  • Posts: 9
Re: [GB] Melody96 Type-C + QMK
« Reply #701 on: Thu, 26 July 2018, 19:24:24 »
sorry for the dumb question, but do i need to program one of my keys to be the FN key?

My bottom row is currently ctrl/win/alt/space/alt/ctrl/arrows

Offline driftingbunnies

  • Posts: 316
Re: [GB] Melody96 Type-C + QMK
« Reply #702 on: Thu, 26 July 2018, 21:37:57 »
Yeah you need to flash it. Just follow the instructions given by Vincent in the manual

Offline BearonicMan

  • Posts: 29
  • Location: Central PA, USA
Re: [GB] Melody96 Type-C + QMK
« Reply #703 on: Fri, 27 July 2018, 07:48:54 »
Got my board yesterday and it's a lot heavier than I expected. The brass plate is scuffed\scratched up fairly badly so I guess I'll need to buff or polish it a bit and it looks like the case was dropped pretty hard in transit or something because it actually deformed the aluminum corner and took a chunk out of it... Overall happy with the board though. I still need to get it hooked up and test the keys as I imagine the drop may have possibly broken some of the soldering. Can't wait to get a set of caps on it and get it up and running though.

Offline KaosJ

  • Posts: 1054
Re: [GB] Melody96 Type-C + QMK
« Reply #704 on: Fri, 27 July 2018, 19:06:20 »
Got my board yesterday and it's a lot heavier than I expected. The brass plate is scuffed\scratched up fairly badly so I guess I'll need to buff or polish it a bit and it looks like the case was dropped pretty hard in transit or something because it actually deformed the aluminum corner and took a chunk out of it... Overall happy with the board though. I still need to get it hooked up and test the keys as I imagine the drop may have possibly broken some of the soldering. Can't wait to get a set of caps on it and get it up and running though.

damn son  :(

if you got pics of the package, just contact vincent, this kind of shipping might be insured. 




Offline masterhail

  • Posts: 9
Re: [GB] Melody96 Type-C + QMK
« Reply #705 on: Mon, 30 July 2018, 09:01:01 »
Yeah you need to flash it. Just follow the instructions given by Vincent in the manual

Appreciate the help!

I was able to get everything working fine except the L_GUI key. For some reason I can't get it to register as the windows key.

I've re-flashed the firmware and the layout multiple times now but haven't been successful. The switch is working, as I can map it to something else and it works fine. it just doesn't want to work as the windows key.

Any advice on how to fix the issue?

Offline driftingbunnies

  • Posts: 316
Re: [GB] Melody96 Type-C + QMK
« Reply #706 on: Mon, 30 July 2018, 10:36:03 »
I'll take a look when I get home but the standard json file from the drive seem to work for me. All I did was switch fn and Ctrl for my setup

https://drive.google.com/open?id=1oJmSfjgs_DugsvloO9VaO5KWvwS4T2OX

Offline masterhail

  • Posts: 9
Re: [GB] Melody96 Type-C + QMK
« Reply #707 on: Mon, 30 July 2018, 10:49:00 »
I'll take a look when I get home but the standard json file from the drive seem to work for me. All I did was switch fn and Ctrl for my setup

https://drive.google.com/open?id=1oJmSfjgs_DugsvloO9VaO5KWvwS4T2OX

Yeah that was the same json I was using. I had just changed a few keys on the numpad and the fn/ctrl switch. Other than that it's just using that standard Json.

Going to try and totally wipe and reflash again and see if it makes a difference.

Offline Broseph

  • Posts: 14
  • Location: Texas
Re: [GB] Melody96 Type-C + QMK
« Reply #708 on: Mon, 30 July 2018, 13:12:36 »
Yeah you need to flash it. Just follow the instructions given by Vincent in the manual

Appreciate the help!

I was able to get everything working fine except the L_GUI key. For some reason I can't get it to register as the windows key.

I've re-flashed the firmware and the layout multiple times now but haven't been successful. The switch is working, as I can map it to something else and it works fine. it just doesn't want to work as the windows key.

Any advice on how to fix the issue?
I had the same issue, it was because bootmagic was disabling left windows. Holding space and the left windows key while plugging in the board is what fixed it for me.

https://docs.qmk.fm/#/feature_bootmagic

Offline masterhail

  • Posts: 9
Re: [GB] Melody96 Type-C + QMK
« Reply #709 on: Mon, 30 July 2018, 16:19:57 »
I had the same issue, it was because bootmagic was disabling left windows. Holding space and the left windows key while plugging in the board is what fixed it for me.

https://docs.qmk.fm/#/feature_bootmagic
[/quote]

Thanks for that info! Been reading up - didn't realize bootmagic had so many options.

Unfortunately I still can't get the LGUI key to register when holding down space+windows while plugging it in.

I can get the board to reset all options by holding space+esc on boot, but can't seem to get this dang windows key to fire up.

Offline Thumper_

  • Posts: 218
  • Location: Germany
  • Spend all my money.
Re: [GB] Melody96 Type-C + QMK
« Reply #710 on: Mon, 30 July 2018, 18:56:56 »
So my board arrived (beautiful and top quality)and upon building it I noticed that 9/16 rgb leds light up and no key / switch registers. Even with a SS316 bridge there is no key press.
For the rgb led I’ll upload an image tomorrow maybe there is an issue I don’t see.
For the Keycaps problem, i followed the pdf manual step by step but somewhere is a bug ...

Offline Jkush463

  • Posts: 367
  • Location: Aurora, IL
Re: [GB] Melody96 Type-C + QMK
« Reply #711 on: Mon, 30 July 2018, 22:54:33 »
If anyone has a gold top or whole case they want to sell bang my line

Offline Thumper_

  • Posts: 218
  • Location: Germany
  • Spend all my money.
Re: [GB] Melody96 Type-C + QMK
« Reply #712 on: Tue, 31 July 2018, 05:41:56 »
So my board arrived (beautiful and top quality)and upon building it I noticed that 9/16 rgb leds light up and no key / switch registers. Even with a SS316 bridge there is no key press.
For the rgb led I’ll upload an image tomorrow maybe there is an issue I don’t see.
For the Keycaps problem, i followed the pdf manual step by step but somewhere is a bug ...


So, nearly everything works now.

Rgb light is still at 9/16 LEDs. I tried to resolder the last working and first not working led. Will replace them later with a new led.
And my 8 key is not registering. Neither in the switch nor on the pcb. How can I troubleshoot this?

Offline BearonicMan

  • Posts: 29
  • Location: Central PA, USA
Re: [GB] Melody96 Type-C + QMK
« Reply #713 on: Wed, 01 August 2018, 12:36:31 »

damn son  :(

if you got pics of the package, just contact vincent, this kind of shipping might be insured.

Thanks dude, I'm going to mess around with it this weekend here, I'll try to upload a pic or two this evening. It's nothing that can't be fixed though.

Offline jihadu

  • Posts: 283
  • Location: Portugal
Re: [GB] Melody96 Type-C + QMK
« Reply #714 on: Wed, 01 August 2018, 15:36:27 »
Have the EU orders started to ship already? We got an Email from saying it would arrive soon, but it's been 3 weeks since that
« Last Edit: Wed, 08 August 2018, 17:36:08 by jihadu »

Offline BearonicMan

  • Posts: 29
  • Location: Central PA, USA
Re: [GB] Melody96 Type-C + QMK
« Reply #715 on: Thu, 02 August 2018, 13:35:38 »
Just those pics I talked about earlier, nothing too crazy and nothing that's not fixable, just looks like it's been through the ringer.
201288-0201290-1201292-2

Offline Astralou

  • Posts: 9
Re: [GB] Melody96 Type-C + QMK
« Reply #716 on: Sun, 12 August 2018, 22:00:50 »
Just wanna share mine : Cyan and Cyan plate with acrylic bottom and SA Miami

Offline Jay5ash

  • Posts: 1
Re: [GB] Melody96 Type-C + QMK
« Reply #717 on: Mon, 13 August 2018, 06:29:49 »
Have the EU orders started to ship already? We got an Email from saying it would arrive soon, but it's been 3 weeks since that

Hi jihadu
Are you still waiting for you board to be shipped?

Offline jihadu

  • Posts: 283
  • Location: Portugal
Re: [GB] Melody96 Type-C + QMK
« Reply #718 on: Wed, 15 August 2018, 12:22:06 »
Have the EU orders started to ship already? We got an Email from saying it would arrive soon, but it's been 3 weeks since that

Hi jihadu
Are you still waiting for you board to be shipped?
Just got the shipping notification yesterday

Offline WHeisenberg

  • Posts: 53
Re: [GB] Melody96 Type-C + QMK
« Reply #719 on: Tue, 21 August 2018, 14:17:41 »
Mine just arrived! Looks awesome in person. Truly eye catching.  :thumb:

Now I just need to read up on how to assemble and program it. Saw some useful tips earlier in this thread, so thanks for those!

Offline Kibort

  • Posts: 13
Re: [GB] Melody96 Type-C + QMK
« Reply #720 on: Tue, 28 August 2018, 04:37:00 »
I got my melody96 from the Candykeys proxy a few days ago. The board looks absolutely stunning. Tested all the keys with a tweezer and all good. Half of the SMD leds on the underside didn’t light up at first. After some testing and looking I saw that 1 of them in he corner got pulled of during shipping. Was easy enough to solder in a new one that came extra with the board. All good now. Now just waiting on a keyset FeelsBadMan

Offline mousetrap00

  • Posts: 53
Re: [GB] Melody96 Type-C + QMK
« Reply #721 on: Tue, 28 August 2018, 14:56:51 »
Mine just arrived! Looks awesome in person. Truly eye catching.  :thumb:

Now I just need to read up on how to assemble and program it. Saw some useful tips earlier in this thread, so thanks for those!
What colors are those?

Offline Uhmmmm

  • Posts: 4
Re: [GB] Melody96 Type-C + QMK
« Reply #722 on: Sat, 01 September 2018, 20:14:45 »
How can i turn off leds without Fn? I didn't like FN button :(

Offline jihadu

  • Posts: 283
  • Location: Portugal
Re: [GB] Melody96 Type-C + QMK
« Reply #723 on: Sat, 01 September 2018, 21:40:11 »
How can i turn off leds without Fn? I didn't like FN button :(
If you want too, you can program any key to led control. That's the beauty of programability

Offline Tasteless

  • Posts: 25
Re: [GB] Melody96 Type-C + QMK
« Reply #724 on: Sun, 02 September 2018, 11:01:24 »
Just those pics I talked about earlier, nothing too crazy and nothing that's not fixable, just looks like it's been through the ringer.
(Attachment Link) (Attachment Link) (Attachment Link)
Just a heads up, yours looks exactly like mine did before removing the plastic film cover.  Have you removed the weight and made sure you don't have the film there?

Offline KaosJ

  • Posts: 1054
Re: [GB] Melody96 Type-C + QMK
« Reply #725 on: Sun, 02 September 2018, 11:04:18 »
Just those pics I talked about earlier, nothing too crazy and nothing that's not fixable, just looks like it's been through the ringer.
(Attachment Link) (Attachment Link) (Attachment Link)
Just a heads up, yours looks exactly like mine did before removing the plastic film cover.  Have you removed the weight and made sure you don't have the film there?

I was thinking the same. Mine was like that before removing the plastic on it. 




Offline notFREEfood

  • Posts: 11
Re: [GB] Melody96 Type-C + QMK
« Reply #726 on: Mon, 03 September 2018, 22:08:45 »
So layer 1 is permanently activated on my board, and I think that this is the source of my issue (seeing this on multiple keys for this row):





Anyone have any idea as to what is causing this?  Not using screw-in stabs and I can't see any solder bridges.

Offline merlin64

  • Posts: 1273
  • Location: Seattle, WA
    • MechMerlin
Re: [GB] Melody96 Type-C + QMK
« Reply #727 on: Tue, 04 September 2018, 13:31:04 »
So layer 1 is permanently activated on my board, and I think that this is the source of my issue (seeing this on multiple keys for this row):

Show Image


Show Image


Anyone have any idea as to what is causing this?  Not using screw-in stabs and I can't see any solder bridges.

Have you tried reflashing the board and maybe putting the Fn somewhere else?

Offline Dumblescore

  • Posts: 47
Re: [GB] Melody96 Type-C + QMK
« Reply #728 on: Thu, 06 September 2018, 14:17:54 »
Apologies if it’s out there and I didn’t see it — is the plate design available to download somewhere?  I’m looking to get a busted Melody and try a completely different layout with it but I’m going to have to make a new plate.  Thanks!

Offline Uhmmmm

  • Posts: 4
Re: [GB] Melody96 Type-C + QMK
« Reply #729 on: Fri, 07 September 2018, 20:45:07 »
How can i turn off leds without Fn? I didn't like FN button :(
If you want too, you can program any key to led control. That's the beauty of programability
Can i use macro to setup rgb toggle button? I don't see any option in order to control lightning in macro tab.
BTW: i changed right Alt into Fn  :-X

Offline KaosJ

  • Posts: 1054
Re: [GB] Melody96 Type-C + QMK
« Reply #730 on: Sat, 08 September 2018, 04:13:59 »
So layer 1 is permanently activated on my board, and I think that this is the source of my issue (seeing this on multiple keys for this row):

Show Image


Show Image


Anyone have any idea as to what is causing this?  Not using screw-in stabs and I can't see any solder bridges.

What layout you flashed in the first place?  I'm not an expert with the multimeter so on this i can't help, but i think you are trying to do the "last thing to try" and i don't know if you tried the "first things to try".  E.g. do you even have a key to switch layers setted? You tried to do an hard reset?




Offline azachhh

  • Posts: 74
  • Location: Tennessee
Re: [GB] Melody96 Type-C + QMK
« Reply #731 on: Sun, 09 September 2018, 20:28:28 »
my two melody96s!

Offline Uhmmmm

  • Posts: 4
Re: [GB] Melody96 Type-C + QMK
« Reply #732 on: Sun, 09 September 2018, 23:46:08 »
I want to add leds for cap lock and num lock in order to recognize that i pressed them or not. However, i don't know how to do that  :(

Offline notFREEfood

  • Posts: 11
Re: [GB] Melody96 Type-C + QMK
« Reply #733 on: Wed, 12 September 2018, 21:45:01 »
So layer 1 is permanently activated on my board, and I think that this is the source of my issue (seeing this on multiple keys for this row):

Show Image


Show Image


Anyone have any idea as to what is causing this?  Not using screw-in stabs and I can't see any solder bridges.

What layout you flashed in the first place?  I'm not an expert with the multimeter so on this i can't help, but i think you are trying to do the "last thing to try" and i don't know if you tried the "first things to try".  E.g. do you even have a key to switch layers setted? You tried to do an hard reset?

I've already tried flashing the default layout, and if I'm reading the layout correctly that's they key to switch layers.  If I plug it into a computer it immediately starts behaving like a handful of keys are held down, and I've confirmed it is in layer 1 as the LED controls work.

I should be seeing a zero for when I have my two leads on those pads as there should be absolutely no path for current, but what I am seeing indicates that there is some component bridging the gap between the two lines.  Deleting the keys from the keymap to test this out is probably a good place to start, but trying to find motivation to work on this when I've already got a number of other headaches is difficult. I'm just hoping it's something stupid that somehow I'm overlooking, because the other reasons I can think of I really dislike (stab lube is slightly conductive, bad chip).

Offline KaosJ

  • Posts: 1054
Re: [GB] Melody96 Type-C + QMK
« Reply #734 on: Thu, 13 September 2018, 14:58:15 »
So layer 1 is permanently activated on my board, and I think that this is the source of my issue (seeing this on multiple keys for this row):

Show Image


Show Image


Anyone have any idea as to what is causing this?  Not using screw-in stabs and I can't see any solder bridges.

What layout you flashed in the first place?  I'm not an expert with the multimeter so on this i can't help, but i think you are trying to do the "last thing to try" and i don't know if you tried the "first things to try".  E.g. do you even have a key to switch layers setted? You tried to do an hard reset?

I've already tried flashing the default layout, and if I'm reading the layout correctly that's they key to switch layers.  If I plug it into a computer it immediately starts behaving like a handful of keys are held down, and I've confirmed it is in layer 1 as the LED controls work.

I should be seeing a zero for when I have my two leads on those pads as there should be absolutely no path for current, but what I am seeing indicates that there is some component bridging the gap between the two lines.  Deleting the keys from the keymap to test this out is probably a good place to start, but trying to find motivation to work on this when I've already got a number of other headaches is difficult. I'm just hoping it's something stupid that somehow I'm overlooking, because the other reasons I can think of I really dislike (stab lube is slightly conductive, bad chip).

You should write Vincent, his contacts are in the first page




Offline azachhh

  • Posts: 74
  • Location: Tennessee
Re: [GB] Melody96 Type-C + QMK
« Reply #735 on: Fri, 14 September 2018, 06:37:04 »
So layer 1 is permanently activated on my board, and I think that this is the source of my issue (seeing this on multiple keys for this row):

Show Image


Show Image


Anyone have any idea as to what is causing this?  Not using screw-in stabs and I can't see any solder bridges.

What layout you flashed in the first place?  I'm not an expert with the multimeter so on this i can't help, but i think you are trying to do the "last thing to try" and i don't know if you tried the "first things to try".  E.g. do you even have a key to switch layers setted? You tried to do an hard reset?

I've already tried flashing the default layout, and if I'm reading the layout correctly that's they key to switch layers.  If I plug it into a computer it immediately starts behaving like a handful of keys are held down, and I've confirmed it is in layer 1 as the LED controls work.

I should be seeing a zero for when I have my two leads on those pads as there should be absolutely no path for current, but what I am seeing indicates that there is some component bridging the gap between the two lines.  Deleting the keys from the keymap to test this out is probably a good place to start, but trying to find motivation to work on this when I've already got a number of other headaches is difficult. I'm just hoping it's something stupid that somehow I'm overlooking, because the other reasons I can think of I really dislike (stab lube is slightly conductive, bad chip).

If you can't get it figured out, I have an extra PCB I could sell you. $20 + whatever it costs to ship.

Re: [GB] Melody96 Type-C + QMK
« Reply #736 on: Fri, 14 September 2018, 17:57:10 »
A little late to this but I couldn't get around to building the keyboard until now. Anybody else have an issue with the LED's? I have everything flashed and tried the FN+QUERTYUI and nothing will toggle the bottom LED's on. I even tried changing other keybindings on the FN(1) layer to make sure the FN was working properly but to no avail. Just looking for any advice because I bought the acrylic bottom so it's pretty pointless if the underglow doesn't work.

Offline YiZZo

  • Posts: 62
  • Location: California
Re: [GB] Melody96 Type-C + QMK
« Reply #737 on: Fri, 14 September 2018, 19:08:20 »
I am in the same boat as you man. Acrylic bottom and some of the LEDs on the bottom row dont work. I tried reflowing the last un-lit LED and next lit LED and I was able to get one LED to come back, but the rest still don't light up. So I tried reflowing all the un-lit LEDs to no avail. I don't know if I need to replace those LEDs all together or the board traces for the LEDs are bad.

Does anyone have spare LEDs or know the size/model of the LEDs that I can buy?

Offline superuser41

  • Posts: 25
Re: [GB] Melody96 Type-C + QMK
« Reply #738 on: Sun, 16 September 2018, 15:14:37 »
The traces are unlikely to be bad. The LEDs are standard 5050-size WS2012b/SK6812s. The datasheet has the pinout, for troubleshooting: https://www.seeedstudio.com/document/pdf/WS2812B%20Datasheet.pdf

Offline notFREEfood

  • Posts: 11
Re: [GB] Melody96 Type-C + QMK
« Reply #739 on: Sun, 16 September 2018, 16:33:12 »
So layer 1 is permanently activated on my board, and I think that this is the source of my issue (seeing this on multiple keys for this row):

Show Image


Show Image


Anyone have any idea as to what is causing this?  Not using screw-in stabs and I can't see any solder bridges.

What layout you flashed in the first place?  I'm not an expert with the multimeter so on this i can't help, but i think you are trying to do the "last thing to try" and i don't know if you tried the "first things to try".  E.g. do you even have a key to switch layers setted? You tried to do an hard reset?

I've already tried flashing the default layout, and if I'm reading the layout correctly that's they key to switch layers.  If I plug it into a computer it immediately starts behaving like a handful of keys are held down, and I've confirmed it is in layer 1 as the LED controls work.

I should be seeing a zero for when I have my two leads on those pads as there should be absolutely no path for current, but what I am seeing indicates that there is some component bridging the gap between the two lines.  Deleting the keys from the keymap to test this out is probably a good place to start, but trying to find motivation to work on this when I've already got a number of other headaches is difficult. I'm just hoping it's something stupid that somehow I'm overlooking, because the other reasons I can think of I really dislike (stab lube is slightly conductive, bad chip).

If you can't get it figured out, I have an extra PCB I could sell you. $20 + whatever it costs to ship.

Thanks for the offer; I'm going to wait to hear back from Vincent, but if that goes nowhere I'll probably take you up on it.

Anyone have any thoughts on replacing the microcontroller?

Offline superuser41

  • Posts: 25
Re: [GB] Melody96 Type-C + QMK
« Reply #740 on: Mon, 17 September 2018, 07:52:14 »
For what reason? That's the least likely culprit.

Offline notFREEfood

  • Posts: 11
Re: [GB] Melody96 Type-C + QMK
« Reply #741 on: Tue, 18 September 2018, 01:47:05 »
For what reason? That's the least likely culprit.

Every single IO pin has a voltage drop going towards one IO pin, which is the pin that takes in the row input for the function key.  Flipping the leads results in an open circuit, which means that there is at least one diode in between this IO pin and all of the other IO pins.  Unfortunately with switches soldered in I can only see half of the board, but there's no obvious defects that I can see, especially one that would cause this pin to get connected to every single other pin.  I didn't completely mangle my board, which should be obvious from the picture, and there is no circuitry that I can find outside of the chip that could produce the results I see from my multimeter.  I can think of reasons why this circuitry would exist inside of the chip however, and if the internal diode went bad and is now allowing bidirectional current that would explain everything.

The only reason I'm hesitating is because I have very limited experience with smt soldering (my Iris was the first time I had ever done it).

Offline the_high_5

  • Posts: 70
Re: [GB] Melody96 Type-C + QMK
« Reply #742 on: Tue, 18 September 2018, 16:27:38 »
I wasn't a part of the group buy, but I was lucky enough to pick up a kit from Vincent. Thought I'd share my build with you all. Really happy with this!

- Black aluminum case (top and bottom) with brass plate
- Outemu Sky v2.2 lubed with Tribosys 3204
- JTK Photo Studio

Offline Jkush463

  • Posts: 367
  • Location: Aurora, IL
Re: [GB] Melody96 Type-C + QMK
« Reply #743 on: Tue, 18 September 2018, 16:35:45 »
still looking for a gold melody if anyone wants to give one up!

Offline superuser41

  • Posts: 25
Re: [GB] Melody96 Type-C + QMK
« Reply #744 on: Wed, 19 September 2018, 10:22:36 »
For what reason? That's the least likely culprit.

Every single IO pin has a voltage drop going towards one IO pin, which is the pin that takes in the row input for the function key.  Flipping the leads results in an open circuit, which means that there is at least one diode in between this IO pin and all of the other IO pins.  Unfortunately with switches soldered in I can only see half of the board, but there's no obvious defects that I can see, especially one that would cause this pin to get connected to every single other pin.  I didn't completely mangle my board, which should be obvious from the picture, and there is no circuitry that I can find outside of the chip that could produce the results I see from my multimeter.  I can think of reasons why this circuitry would exist inside of the chip however, and if the internal diode went bad and is now allowing bidirectional current that would explain everything.

The only reason I'm hesitating is because I have very limited experience with smt soldering (my Iris was the first time I had ever done it).

Well, that's annoying. I would offer to replace the 32u4 for you but shipping two ways may make it less appealing than just getting that new PCB that was offered.

Offline notFREEfood

  • Posts: 11
Re: [GB] Melody96 Type-C + QMK
« Reply #745 on: Thu, 20 September 2018, 02:10:19 »
For what reason? That's the least likely culprit.

Every single IO pin has a voltage drop going towards one IO pin, which is the pin that takes in the row input for the function key.  Flipping the leads results in an open circuit, which means that there is at least one diode in between this IO pin and all of the other IO pins.  Unfortunately with switches soldered in I can only see half of the board, but there's no obvious defects that I can see, especially one that would cause this pin to get connected to every single other pin.  I didn't completely mangle my board, which should be obvious from the picture, and there is no circuitry that I can find outside of the chip that could produce the results I see from my multimeter.  I can think of reasons why this circuitry would exist inside of the chip however, and if the internal diode went bad and is now allowing bidirectional current that would explain everything.

The only reason I'm hesitating is because I have very limited experience with smt soldering (my Iris was the first time I had ever done it).

Well, that's annoying. I would offer to replace the 32u4 for you but shipping two ways may make it less appealing than just getting that new PCB that was offered.

You were right that it wasn't the chip...apparently one of the switch pads is incredibly easy to bridge to ground, to the point were you can bridge it, desolder the switch and the bridge will still remain

Pictures of the evil pad in question to come tomorrow when I'm not falling asleep

EDIT: yup, that was the culprit, a single leg shorted to ground...now I need to figure out how to fix the two LEDs that I murdered in the process of fixing the switches

EDIT 2: how do you desolder one of the rgb leds with a conventional soldering iron? I removed all of the visible solder and it's still stuck...

Here's the bad pad in question.  You can't really tell from this, but the ground is exposed a fraction of a millimeter away from the pad...

« Last Edit: Fri, 21 September 2018, 00:29:00 by notFREEfood »

Offline Chennasaurus

  • Posts: 1
  • Location: USA
Re: [GB] Melody96 Type-C + QMK
« Reply #746 on: Fri, 21 September 2018, 11:22:21 »
I've been having some similar issues with my board as well, it being pre-soldered. Half of the PCB LEDs do not light up and it's also permanently in layer 1.

I don't have the time or the expertise to debug and fix this, so I'm offering to sell the board to anyone who wants it. I've also learned my lesson about getting things soldered, rather than doing it myself.

It's a gold case with acrylic bottom, kailh brown switches, and had the PBT Gold and Blue switches that Vincent offered. Everything works fine besides the above defects (couldn't do anything about the LEDs, but I've reprogrammed everything to layer 1 of the board as a temporary fix).

Offline superuser41

  • Posts: 25
Re: [GB] Melody96 Type-C + QMK
« Reply #747 on: Sat, 22 September 2018, 09:46:26 »
For what reason? That's the least likely culprit.

Every single IO pin has a voltage drop going towards one IO pin, which is the pin that takes in the row input for the function key.  Flipping the leads results in an open circuit, which means that there is at least one diode in between this IO pin and all of the other IO pins.  Unfortunately with switches soldered in I can only see half of the board, but there's no obvious defects that I can see, especially one that would cause this pin to get connected to every single other pin.  I didn't completely mangle my board, which should be obvious from the picture, and there is no circuitry that I can find outside of the chip that could produce the results I see from my multimeter.  I can think of reasons why this circuitry would exist inside of the chip however, and if the internal diode went bad and is now allowing bidirectional current that would explain everything.

The only reason I'm hesitating is because I have very limited experience with smt soldering (my Iris was the first time I had ever done it).

Well, that's annoying. I would offer to replace the 32u4 for you but shipping two ways may make it less appealing than just getting that new PCB that was offered.

You were right that it wasn't the chip...apparently one of the switch pads is incredibly easy to bridge to ground, to the point were you can bridge it, desolder the switch and the bridge will still remain

Pictures of the evil pad in question to come tomorrow when I'm not falling asleep

EDIT: yup, that was the culprit, a single leg shorted to ground...now I need to figure out how to fix the two LEDs that I murdered in the process of fixing the switches

EDIT 2: how do you desolder one of the rgb leds with a conventional soldering iron? I removed all of the visible solder and it's still stuck...

Here's the bad pad in question.  You can't really tell from this, but the ground is exposed a fraction of a millimeter away from the pad...

Show Image


Glad you found the short. For the LED, I typically use either low-temperature solder or a hot-air reflow station. It's definitely going to be trickier without those. Did you use wick?

Offline notFREEfood

  • Posts: 11
Re: [GB] Melody96 Type-C + QMK
« Reply #748 on: Sat, 22 September 2018, 13:37:47 »
For what reason? That's the least likely culprit.

Every single IO pin has a voltage drop going towards one IO pin, which is the pin that takes in the row input for the function key.  Flipping the leads results in an open circuit, which means that there is at least one diode in between this IO pin and all of the other IO pins.  Unfortunately with switches soldered in I can only see half of the board, but there's no obvious defects that I can see, especially one that would cause this pin to get connected to every single other pin.  I didn't completely mangle my board, which should be obvious from the picture, and there is no circuitry that I can find outside of the chip that could produce the results I see from my multimeter.  I can think of reasons why this circuitry would exist inside of the chip however, and if the internal diode went bad and is now allowing bidirectional current that would explain everything.

The only reason I'm hesitating is because I have very limited experience with smt soldering (my Iris was the first time I had ever done it).

Well, that's annoying. I would offer to replace the 32u4 for you but shipping two ways may make it less appealing than just getting that new PCB that was offered.

You were right that it wasn't the chip...apparently one of the switch pads is incredibly easy to bridge to ground, to the point were you can bridge it, desolder the switch and the bridge will still remain

Pictures of the evil pad in question to come tomorrow when I'm not falling asleep

EDIT: yup, that was the culprit, a single leg shorted to ground...now I need to figure out how to fix the two LEDs that I murdered in the process of fixing the switches

EDIT 2: how do you desolder one of the rgb leds with a conventional soldering iron? I removed all of the visible solder and it's still stuck...

Here's the bad pad in question.  You can't really tell from this, but the ground is exposed a fraction of a millimeter away from the pad...

Show Image


Glad you found the short. For the LED, I typically use either low-temperature solder or a hot-air reflow station. It's definitely going to be trickier without those. Did you use wick?

I tried using wick, but the LED still wouldn't come off

I was thinking hot air is the way to do it, but I really don't want to drop a few hundred on one right now...

Offline superuser41

  • Posts: 25
Re: [GB] Melody96 Type-C + QMK
« Reply #749 on: Sat, 22 September 2018, 22:55:34 »
For what reason? That's the least likely culprit.

Every single IO pin has a voltage drop going towards one IO pin, which is the pin that takes in the row input for the function key.  Flipping the leads results in an open circuit, which means that there is at least one diode in between this IO pin and all of the other IO pins.  Unfortunately with switches soldered in I can only see half of the board, but there's no obvious defects that I can see, especially one that would cause this pin to get connected to every single other pin.  I didn't completely mangle my board, which should be obvious from the picture, and there is no circuitry that I can find outside of the chip that could produce the results I see from my multimeter.  I can think of reasons why this circuitry would exist inside of the chip however, and if the internal diode went bad and is now allowing bidirectional current that would explain everything.

The only reason I'm hesitating is because I have very limited experience with smt soldering (my Iris was the first time I had ever done it).

Well, that's annoying. I would offer to replace the 32u4 for you but shipping two ways may make it less appealing than just getting that new PCB that was offered.

You were right that it wasn't the chip...apparently one of the switch pads is incredibly easy to bridge to ground, to the point were you can bridge it, desolder the switch and the bridge will still remain

Pictures of the evil pad in question to come tomorrow when I'm not falling asleep

EDIT: yup, that was the culprit, a single leg shorted to ground...now I need to figure out how to fix the two LEDs that I murdered in the process of fixing the switches

EDIT 2: how do you desolder one of the rgb leds with a conventional soldering iron? I removed all of the visible solder and it's still stuck...

Here's the bad pad in question.  You can't really tell from this, but the ground is exposed a fraction of a millimeter away from the pad...

Show Image


Glad you found the short. For the LED, I typically use either low-temperature solder or a hot-air reflow station. It's definitely going to be trickier without those. Did you use wick?

I tried using wick, but the LED still wouldn't come off

I was thinking hot air is the way to do it, but I really don't want to drop a few hundred on one right now...

Since the LED is busted anyway you can carefully lift each leg as you heat it, or get some low-melting-point solder.
« Last Edit: Sun, 23 September 2018, 19:20:13 by superuser41 »