PAW X1 - SuperCombo1

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PAW X1 - SuperCombo1

Postby matseng » Fri Jan 18, 2013 11:23 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.

Since Seeedstudio have a campaign this weekend where every PCB order gives a free $10 PCB voucher I feel that I have to throw in an extra project today . So here it is.... The SuperCombo1 extra PAW X1!

This is a combo breakout and utility board with five different designs. Two of the designs, the Single Wire LCD backpacks, I did PCBs for a couple of month back, but they were flawed and needed a few greenwires to work properly. This version should hopefully work better. viewtopic.php?f=56&t=4484

The third design is a thru-hole version of PAW1 NU-Xtal. viewtopic.php?f=56&t=4891

The fourth design is a USB breakout board with a Mini USB on one side and a Micro USB on the other.

The fifth design is a small switch mode PSU targeted for OLEDs and programming voltage for microcontrollers. It's based on the FAN5331 chip.

SuperCombo1-top.png
Top side of SuperCombo1 Extra PAW


SuperCombo1-bot.png
Bottom of SuperCombo1 Extra PAW
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Re: PAW X1 - SuperCombo1

Postby Sjaak » Sat Jan 19, 2013 3:19 pm

Great! Any chance to cram some smd caps and resistors ont the xtal board?
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Re: PAW X1 - SuperCombo1

Postby Sleepwalker3 » Sun Jan 20, 2013 1:22 am

Nice :)
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Re: PAW X1 - SuperCombo1

Postby matseng » Sun Jan 20, 2013 11:25 pm

Sjaak wrote:Great! Any chance to cram some smd caps and resistors ont the xtal board?


Nah, I think it will be really tight for having dedicated smd pads. Maybe I'll do a third version down the road....

But the "inner" capacitor holes have a 0805 smd pad overlayed, so it should be possible to hand-solder smd caps there even if the holes would wick the solder a bit at first.

The resistor is not really necessary and is pth only.

The crystal should supports both smd and pth without any problem. I think it even is possible to solder a 5.2x3 smd crystal as well there (same as used in PAW1)

NU-ThruXtal-Front.png
(This render is missing the extra flying lead GND hole at the top of the board)
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Re: PAW X1 - SuperCombo1

Postby Sjaak » Mon Jan 21, 2013 5:58 am

What we did with the protoboard is changed the pad size to 1x1mm, while still placing them in a .1" grid. 0805 resistors and capacitors would fit like a glove, 0603 is do-able.
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Re: PAW X1 - SuperCombo1

Postby matseng » Thu Feb 07, 2013 6:56 am

The board arrived today.

When I get back home I'll try to depanelize them, but I might have made them too close together for to able to break them apart easily after scoring. They might want to break at the long line of holes for the header on the LCD backpack instead of breaking at my score line.

Well, I guess that I'll know in a few days.
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Re: PAW X1 - SuperCombo1

Postby matseng » Wed Feb 13, 2013 11:09 am

The depanelizing wasn't too hard. Much easier than I had anticipated.

SuperComboX1-Misc.jpg
USB breakout, 5->12 volt boost, PTH Xtal/cap breakout

SuperComboX1-1LCD.jpg
The second revision of by 1wire LCD/button backbacks


I soldered up the USB breakout and a thru-hole crystal breakout to test...

USBbreakout.jpg
The USB breakout with a USB Mini on. The bottom have pads for a USB Micro

PTHxtal-breakout.jpg
Crystal/Cap/Resistor breakout with thru hole parts
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Re: PAW X1 - SuperCombo1

Postby dolabra » Wed Feb 13, 2013 1:12 pm

I'm curious, Why did you put 2 rows of headers on the USB breakout?
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Re: PAW X1 - SuperCombo1

Postby Sleepwalker3 » Wed Feb 13, 2013 8:22 pm

I'm guessing stability

edit: fixed typo
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Re: PAW X1 - SuperCombo1

Postby matseng » Thu Feb 14, 2013 11:43 pm

That's right - I hope that by having two rows of headers they will sit better on the breadboard and not be pulled off it by the usb cable so easily.

Maybe it's overkill, but I had the some leftover height for the extra holes since I wanted this pcb to be the same height as the 5->12v smps pcb so it would be easier to depanelize them.
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Re: PAW X1 - SuperCombo1

Postby Sleepwalker3 » Fri Feb 15, 2013 1:13 am

Yay! I guess right, what did I win???! lol
How much current can the SMPS pump out?
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Re: PAW X1 - SuperCombo1

Postby matseng » Fri Feb 15, 2013 1:34 am

I've no idea of what it will actually deliver, it will probably be highly dependent on the coil and how much ripple that's tolerable. The specs of the switcher ic says 0.5 ohm RDSon , max 1 Amp peak switch current and 1 Watt output power so it won't be too much.

But the board is meant to be used for maybe 10 mA of 7-15 volts for OLED Vpp and HV-programming voltages for pic/avr.

Edit: changed mA value
Last edited by matseng on Fri Feb 15, 2013 2:29 am, edited 1 time in total.
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Re: PAW X1 - SuperCombo1

Postby Sleepwalker3 » Fri Feb 15, 2013 1:46 am

Ah, I see, so I can't jump-start a Jumbo Jet with it? Darn there goes my new project idea!
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