[TriEmbed] PowerFet breakout Re: Recommended SMD Logic-Level MOSFETs for prototyping

[Pete Soper]

OK, here's take two.

This is a general design for any SOIC8 chip with source on pins 1-3, 
gate on 4, and drain on 5-8. The solder pad holes are a tad smaller than 
1.3mm diameter and might support 16 gauge wire (but for sure 18 gauge).

   Board image and schematic pdf: 
http://triembed.org/lib/PowerFetSOIC8-1<http://triembed.org/lib/IRF6201-20150624-BRD.png>

   (Eagle schematic 
<http://triembed.org/lib/PowerFetSOIC8-1/PowerFetSOIC8-1.sch> and board 
<http://triembed.org/lib/PowerFetSOIC8-1/PowerFetSOIC8-1.brd> files for 
review)

If nobody sees a problem I'll upload this and have some made and test 
them, hopefully before the next meeting. As soon as they do test out 
I'll put the files in the "shared" area at OSH Park. As things stand if 
I did the arithmetic right the bare boards will cost 41 cents each.

What about using GitHub for a library? Actually, let me restate that. No 
way, no how will the TriEmbed web site be suitable for holding a library 
for multiple reasons. :-)

Here are some notes about this board:
   - I just picked the first component file with the right pinout that I 
found. I double checked that the IR part doesn't have a creative package 
size. I'll cut over to Chip's library if I have to spin this. (I did 
this work yesterday morning but couldn't get the "publishing done" until 
today. "bread and butter")
   - I wish I knew how to cause the top polygon flood to go right around 
the header and pad connections instead of having the three or four 
traces connecting. What is the rationale for these traces vs just 
connecting the entire circumference??
   - The bottom of the board is marked with "TriEmbed", "PowerFet", and 
"2015".  The Creative Commons license is about the notion that no 
license is worse than having a license and attribution helps keep the 
Internet sane(ish).

-Pete


On 6/23/2015 3:52 PM, Shane Trent wrote:
> Pete,
>
> I like the board. I think a library of helper boards could be helpful 
> for prototyping. The engineers at Pololu have the best examples I have 
> seen for high-current PCB layout with surface mount MOSFETS. This 
> board uses SOIC8 transistors in a motor driver H-bridge rated for 18 
> volts and 15 amps. I like their multipurpose details on the 
> high-current terminals. They use all the copper they can for the 
> terminal pads while allowing the use of screw terminals or direct 
> soldering of two different sizes of wire. Beautiful design.
>
> https://www.pololu.com/product/755
> Top image - https://www.pololu.com/picture/view/0J1025
> Bottom image  - https://www.pololu.com/picture/view/0J1026
>
> Shane
>

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