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Electronics => Projects, Designs, and Technical Stuff => Topic started by: technix on May 12, 2015, 04:06:41 pm

Title: PIC Pro Mini breakout for most SO-28 PIC16's (and hopefully more)
Post by: technix on May 12, 2015, 04:06:41 pm
As I have told you I have a bunch of PIC16F72 and this breakout hopefully broke all pins out in appropriate ways. I will spin a few of those boards (with my VoltCard Original) and if it worked I will open source it for you.

PICKit connector on the left, using straight pins up. Crystal on the right, I will probably use 16, 20 or 24MHz.
Title: Re: PIC Pro Mini breakout for most SO-28 PIC16's (and hopefully more)
Post by: bookaboo on May 12, 2015, 04:13:08 pm
Would be a good idea to route the xtal tracks without the vias. It will still work, its just not best practice.
Title: Re: PIC Pro Mini breakout for most SO-28 PIC16's (and hopefully more)
Post by: technix on May 12, 2015, 04:17:14 pm
Quote from: bookaboo on May 12, 2015, 04:13:08 pm
Would be a good idea to route the xtal tracks without the vias. It will still work, its just not best practice.

Well that works but breaks ground plane. I run GND on top and VCC on bottom.
Title: Re: PIC Pro Mini breakout for most SO-28 PIC16's (and hopefully more)
Post by: bookaboo on May 12, 2015, 09:46:31 pm
You would be better with GND on the bottom, VCC and signals on top.
Title: Re: PIC Pro Mini breakout for most SO-28 PIC16's (and hopefully more)
Post by: technix on May 12, 2015, 09:49:40 pm
Quote from: bookaboo on May 12, 2015, 09:46:31 pm
You would be better with GND on the bottom, VCC and signals on top.

Used to do that until the ground vias drove me crazy. Now I am usually GND on top VCC on bottom.
Title: Re: PIC Pro Mini breakout for most SO-28 PIC16's (and hopefully more)
Post by: technix on May 12, 2015, 10:08:57 pm
Quote from: bookaboo on May 12, 2015, 09:46:31 pm
You would be better with GND on the bottom, VCC and signals on top.

Actually on this board I figured out a way to put GND on both sides and do a lot of GND via stitching, and extra thick power tracks.