AVR-Chat

On Tue, 14 Jun 2005 12:28:22 -0000 you wrote:

>--- In AVR-Chat@yahoogroups.com, Don Ingram <don@l...> wrote:
>> It amazed me when I started as to how your muscles etc 'servo' to 
>what 
>> your eyes can see. if you have the magnification for the eyes, the 
>hands 
>> can do some extremely fine work. On protos I often ended up 
>soldering 
>> bits of kynar wire onto fine legs of IC,s to add a quick logic 
>analyser 
>> test socket or the like.
>
>
>yes, I have done some extremely fine work with sufficient 
>magnification.  The finest work I ever did was dissecting one layer 
>of nerve cells from another in a retina.  I forget what 
>magnification it was, but it was quite tedious.
>
>I also found that fine motor tremor was noticeably worse if I had 
>even one beer the night before.  Since I did that work on weekends 
>(in college), it put a crimp in my partying.

Vitamin B1 and calcium/magnesium supplements seem to help with that :-)

>The loupes I currently use have much less magnification, but with my 
>crude soldering iron.....  it has more than enough mag.
>
>I was considering getting a 1/64" tip for an iron, but now I think 
>that something slightly wider (chisel tip shape) may be better 
>for "drag soldering".
>
>I still have not found a good reference on the technique of drag 
>soldering?  I t seems as if the technique is to make a blob of 
>solder and drag it across all the pads on one side of the chip.  I 
>guess the solder mask prevents bridging?  I would have thought that 
>all the pins would just get shorted together in one big glom of 
>solder....

A few sizes of solder wick seem essential for cleaning up the globs.
--
Ralph Hilton
http://www.ralphhilton.org
C-Meter: http://www.cmeter.org
FZAOINT http://www.fzaoint.net