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A project log for PIXPUTER - computer on PIC17 microprocessor

"PIXPUTER" (or nedoPC-17) is based on PIC17C43 or PIC17C44 microcontroller that works in microprocessor mode with external program memory

SHAOSSHAOS 05/25/2016 at 02:346 Comments

Package from China arrived yesterday :)

Discussions

K.C. Lee wrote 05/25/2016 at 16:40 point

You really *should not* route tracks or place components between the two sides of an  opto-isolator.  It is a bad habit as it decreases your creepage and isolation rating.

It might not matter to you, but the next person comes along copy your layout and assume that it has opto-isolators and have the full isolation that spec by the datasheet.

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SHAOS wrote 05/25/2016 at 16:46 point

OK, I'll fix it later - thanks!
Anyway - this board is mostly a toy and not intended to be a real industrial level piece of equipment ;)

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K.C. Lee wrote 05/25/2016 at 16:50 point

I have seen way too many bad examples of opto-isolator in the open source world.  People without the proper experiences are likely to copy/paste designs and learn bad habits form others.  :(

I feel there is a responsibility of some kind for that reason.

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SHAOS wrote 05/25/2016 at 17:02 point

Yes, you are right - it will be fixed

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jaromir.sukuba wrote 05/25/2016 at 13:56 point

Nice, who is the board manufacturer? How much did it cost?

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SHAOS wrote 05/25/2016 at 16:07 point

about $18 per board - it was seeedstudio where I usually do 4-layer boards for the last few years

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