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Subject: Re: [Homebrew_PCBs] Microscopes for assembly

From: Stefan Trethan <stefan_trethan@...>
Date: 2003-12-21

I have something like that.
It has x10 and x20, the clearance is, lets call it workable.
could be more for soldering but better than nothing.

I rarely use it, for soldering i only used it to solder the bridges
on a amd athlon cpu (to make it faster).

it is no that practical for soldering, my eyesight is quite ok (in close
range).
It is quite good for inspecting other things...

A sturdy boom mount should be no problem, the range in which the focus is
ok is wide enough i think.
Maybe you can build it so it doesn't need an additional desk (like pivot it
to the side/back if not in use)

You will need the light from the top. My unit has through-light too but i
never need it.
Think about buying a more expensive unit with built-in light and
transformer.

Stefan


On Sun, 21 Dec 2003 16:55:12 -0000, Leon Heller <leon_heller@...>
wrote:

> Most newer devices I'm using like FPGAs come in PQFP packages with 0.5 mm
> spacing so I'm looking around for a suitable microscope to help with
> assembly. A boom-mounted stereo zoom microscope would be ideal, but they
> are
> quite expensive, even second-hand on Ebay, so I'm thinking of buying a
> low-cost stereo microscope and making my own boom mount. I don't need as
> much clearance under the objective as the expensive units offer, so I
> thought that something like the Konus Delta unit here (bottom of page):
>
> http://www.sherwoods-photo.com/konus_microscope/konus_microscopes_fs.htm
>
> at 79 GBP will be adequate. The 20x magnification is ideal for my
> purposes.
> I can manage all the other parts like 0805 Rs and Cs and chips with wider
> spaced leads (like 0.65 mm) without any problems using an ordinary bench
> magnifier.
>
> Has anyone got any other suggestions.
>
> I don't make these PCBs at home, of course.
>
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html
>
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