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'[SX] SX20'
2005\08\19@192902 by Electronegativityn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Electronegativity wrote:

I have in front of me an SX20 chip that came in the mail today.
Its compactness is both alluring and daunting.
Surely the possibilities for such a device are limited only by the imagination, but as I am a graduate of the Big Blob School of Soldering, this poor chip has much to fear.

Fabricating a circuit board in my basement with such fine lines seems like it would be fraught with difficulties, and the mounting process would most likely result in a microcontroller that was 60% tin and 40% lead.

If anyone out there in ElectronLand has a success story about the SX20 then I would be very interested to hear it.

:shocked:

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2005\08\19@193514 by KenMn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, KenM wrote:

Surface mount is not as hard as it may seem.

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2005\08\19@193703 by Electronegativityn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Electronegativity wrote:

Details are more useful than they may seem...  :-)
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2005\08\19@213304 by Coriolisn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Coriolis wrote:

There are techniques to make the job easier, the quickest to master is the drag soldering method as shown in this video. Key is to use flux (water soluable or no clean), don't ride too high on the pins (bridging occurs), and most important: make sure the chip is properly aligned.

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2005\08\20@083509 by beann/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Read MY inspirational thread about diving into the world of SMT here http://forums.parallax.com/forums/default.aspx?f=15&m=76550
Truly it is not that hard. It does take some practice, but I bet I only ruined about 10 chips before I got it down pat.
Now I can solder the SX48 chips with a pitch of only 0.5mm (0.020").

I know somewhere you can buy "dummy" chips that are packages with nothing in them. Of course you have to have something to solder them onto.

Bean.

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2005\08\20@164838 by Electronegativityn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Electronegativity wrote:

Thanks guys, I'll give it a shot sometime.

Right now I don't have enought cash to set myself up for PCB construction.
Maybe parralax would consider selling little boards like this:

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=276-159 that were set up to mount an SX20 with leads that ran out to standard .1'' drilled contacts.

-Alexander
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2005\08\20@194455 by Forrestn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Forrest wrote:

Sparkfun sells a 20 pin SSOP to DIP breakout board for $2.95 - should work great with the SX20
http://www.sparkfun.com/shop/index.php?shop=1&cart=352722&cat=66&
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2005\08\20@203219 by Electronegativityn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Electronegativity wrote:

Thanks Forrest, That's exactly what I was looking for!

I just ordered 6 of them.

:yeah:

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2005\08\20@210321 by Forrestn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Forrest wrote:

Your welcome  :cool:

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