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Date:	Tue, 28 Jan 2014 09:57:56 -0500
From:	"Stephen R. Besch" <sbesch AT buffalo DOT edu>
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To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] 0.5mm pitch connector suggestions
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Rob,

I solder 0.5mm pitch packages (like the ad7790 tsop) all the time time 
for board prototyping. I have fonud the trick to be a microtip soldering 
iron and 30 gauge solder. I also have the advantage of a dissecting 
microscope which helps a great deal. Another very crude technique I have 
used is to simply flood solder and then remove the excess with solder 
wick. The spaces between the pads pop open over the solder mask leaving 
no shorts. Finally, I also use an old toaster oven with 3x3x.5 aluminum 
block and a platinum thermocouple as a temperature control for solder 
reflow. I get the oven up to reflow temperature, set the board on the 
aluminum block, stopwatch for 30 seconds and then remove the board. The 
aluminum block provides a good thermal mass for rapid heating of the 
board and stabilizes the tendency of the cheap oven to drift in 
temperature. This technique seems to be gentler on the components than 
hot-air reflow.

Stephen R. Besch

On 01/27/2014 06:01 PM, Rob Butts wrote:
> I'm using a 7" LCD TFT touch display in a design.  The display has a 
> 50 pin 0.5mm pith flat ribbon cable and comes with a small surface 
> mount zif connector that I think will be nearly impossible to solder 
> to a circuit board.
>
> I have searched for an adapter but I can't find any.  Does anyone know 
> of ribbon cable that steps up the pitch?  I thought maybe I could use 
> a free hanging connector and step up to a 1mm pitch connector which 
> would be much easier to solder.
>
> Any suggestions?


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