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Re: Red/Blue pill with GD32F103CBT6

Posted: Tue Feb 23, 2016 9:59 pm
by RogerClark
Hi Ray

The bumps were a product of me not being able to remove all the solder from the pads on the Maple mini, and also not remove all the solder from the GD32 i removed from another board.

If I had a bare Maple Mini pcb and brand new GD32 this would not be an issue and i could just reflow it using my hot air tool.

Re: Red/Blue pill with GD32F103CBT6

Posted: Tue Feb 23, 2016 10:47 pm
by cazimirb
I didn't remove the solder from the pads, just applied flux and 're-distribute' the solder uniformly with the soldering iron.
You're right Roger, having a bare board and a brand new chip would make it easier to solder.
BTW, just got a working red pill using the same procedure as for the blue pill.

Re: Red/Blue pill with GD32F103CBT6

Posted: Tue Feb 23, 2016 10:51 pm
by RogerClark
I can't quite remember what happened, but I think I damaged one or two of the pads on the Maple mini while trying to position the GD32, so I had to throw the board away :-(

Re: Red/Blue pill with GD32F103CBT6

Posted: Wed Feb 24, 2016 7:13 am
by cazimirb
RogerClark wrote:..I think I damaged one or two of the pads on the Maple mini..
It happened to me too in my first try. One trace was peeled off when I tried to remove a solder bridge (too much heat applied, forgot to change the temperature setting on the soldering station from 350C down to 300C). I destroyed a red pill :(