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Working on Controller

A project log for Bench Power Supply

Designing an open source, modular bench power supply to rule them all.

the-big-oneThe Big One 05/13/2015 at 15:152 Comments

I soldered up the main controller last night, but something is a bit off and I can't seem to program it using the ISP headers. The default bootloader works, though, so I am not quite sure what is wrong. More investigation needed.

I did discover one more error: the crystal footprint is rotated 90 degrees from what it should be. So, instead of placing it in 2.5x2 orientation, you should place it in 2x2.5. If that makes any sense at all. :-)

More updates to follow once I figure out what in the world is happening with ISP.

Discussions

Michael Vowles wrote 05/17/2015 at 06:11 point

So you can burn the bootloader but not a program is that correct?

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The Big One wrote 05/19/2015 at 00:15 point

As of this log, I cannot burn anything. In my next log I describe a workaround... Burn the boot loader and fuses prior to soldering everything else onto the board. I then use the boot loader to program future updates via USB. It's not perfect, but it works.

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