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Message-ID: | <52E7C574.1050300@buffalo.edu> |
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? -- fictio cedit veritati
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