PAW3 - NU-SockiSop

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PAW3 - NU-SockiSop

Postby matseng » Thu Dec 27, 2012 3:13 am

As mentioned in an earlier post I'll try to do one small PCB project every week and then send for PCB's of it every Monday.

#2 was a bit late due to xmas and whatnot, but this project is so much simpler that I'm convinced that I'll be able to submit it Monday.

The PAW 3 is a "super-duper-multiple-dualsided" breakout board. Each PCB currently have 4 copies each of 6 different designs (3 designs on each side). So there's a total of 12 breakout boards with two designs each on a 5x5cm PCB.

Sub-board 1 - A SOIC-16 is sharing the board with a TSSOP-16 on the back. This board also have space to put decoupling caps and LEDs/resistors on it.

Sub-board 2 - A SOIC-8 is shared with a TSSOP-8 on the back.

Sub-board 3 - A SOT-23-6 (small 6 pin device) is shared with 2 pcs of SOT-23 (like a transistor) on the back.

The boards will be done on a 0.8 mm pcb with "cutting grooves" made of 0.25mm wide rectangles of tStop/bStop for easier cutting with a box knife.

Any comments and/or suggestions is welcome before Monday when the order will be sent to Seeed.
Attachments
SockiSop-Back-700.jpg
TSSOP-16, TSSOP-8, SOT-23
SockiSop-Front-700.jpg
SOIC-16, SOIC-8, SOT23-6
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Re: PAW3 - NU-SockiSop

Postby sqkybeaver » Thu Dec 27, 2012 1:26 pm

these will be a hit, every time i get a few boards like this there all populated before the night is over.
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Re: PAW3 - NU-SockiSop

Postby honken » Thu Dec 27, 2012 1:37 pm

You got your logo wrong "SLR" in the 8 pin device...
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Re: PAW3 - NU-SockiSop

Postby systemstech » Thu Dec 27, 2012 7:26 pm

Oh man it's only the third design and he already can't see straight. I say lets place bets on how long before he stops. LOL
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Re: PAW3 - NU-SockiSop

Postby blarson » Thu Dec 27, 2012 7:45 pm

No SOT89-5 . Oh well, I need to do my own board for a PT4115E LED driver.
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Re: PAW3 - NU-SockiSop

Postby Sparks » Thu Dec 27, 2012 10:34 pm

How about replacing one of the SOT23 pcbs with LGA14? Some accelerometers and other sensors use this.
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Re: PAW3 - NU-SockiSop

Postby matseng » Fri Dec 28, 2012 12:01 am

Sqkybeaver: It will be hard to get cheaper breakoutboards. At 11 cents each inclusive shipping they're an absolute steal.

Honken: Aaargh... Not again! It seems like my fingers like to type SLR instead of SRL - I even have some parts in my eagle lib that I've misspelled this way.

Blarson: I'll most likely do one more board like this with other pinouts soon - I'll make sure to include the SOT89-5 then.

Sparks: I'll see if I can do that, but the 14 pins of a LGA14 won't fit there without some rearranging. Probably it will be on the next superbreakout board.

Systemstech: You're evil! I'll kick you in your Mojito drinking butt the next time I see you... :-)
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Re: PAW3 - NU-SockiSop

Postby nickjohnson » Sun Dec 30, 2012 2:55 pm

Very nice. Some places will do V-Score, which would make separating the boards a lot easier.
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Re: PAW3 - NU-SockiSop

Postby systemstech » Sun Dec 30, 2012 10:48 pm

@MickM;
MickM wrote: I use a paper cutter (guilotine), works fine.
Mick M


What brand and size paper cutter do you use? Are the blades replaceable?
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Re: PAW3 - NU-SockiSop

Postby matseng » Sun Dec 30, 2012 11:07 pm

Adafruit says that a (low cost) $125 pcb cutter doesn't handle FR4, but it looks sturdy enough to me. Maybe the blades will go dull in zero time... http://www.ladyada.net/library/equipt/ (scroll down to Bench Tools)
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Re: PAW3 - NU-SockiSop

Postby systemstech » Sun Dec 30, 2012 11:22 pm

I've used a scroll saw and a wet saw and haven't had any issues other than the Kerf(Width of the saw cut) size. But if I leave a 3mm gap between boards it's not an issue.
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Re: PAW3 - NU-SockiSop

Postby matseng » Sun Dec 30, 2012 11:30 pm

I would like a 0.5mm thin diamond coated blade on a small table saw... That would be nice. But for the time being I stick to 0.8 mm pcb that can be separated by hand after a quick scratch with a box cutter on each side.
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Re: PAW3 - NU-SockiSop

Postby systemstech » Sun Dec 30, 2012 11:33 pm

The quickest at cutting is the wet saw and dust free. I'am still looking for a fast way of making the corners on the boards.
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Re: PAW3 - NU-SockiSop

Postby matseng » Sun Dec 30, 2012 11:38 pm

MickM; Can you cut 1.6mm (.063”) FR4 boards with it? Or only phenolic boards?
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Re: PAW3 - NU-SockiSop

Postby systemstech » Sun Dec 30, 2012 11:39 pm

Hi MickM;

MickM wrote:Hi systemstech ;
It's just a cheap one.
Photo attached.
I just press down very firmly so that the pcb doesn't squirm away.
It's about 10" square, I bought it used to experiment with.

Mick M


I almost bought one just like yours. but what stopped me was that I thought it might not cut perfectly straight or it would shear the board.
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