Alt-BEAM Archive

Message #02096



To: George Rix rix.g@bmts.com
From: Chiu-Yuan Fang chiumanfu@home.com
Date: Wed, 07 Apr 1999 16:12:04 -0700
Subject: [alt-beam] Re: Soldering Troubles


I suggest a helping hand...
All Electronics has them for $6.50 (CAT# HELPH)
or add $1.50 for one with a magnifying glass (CAT# HELPH-M)

http://www.allcorp.com/

Chiu

George Rix wrote:
>
> Hello, all!
> Just a little while ago I completed my first prototype BEAM drone for my
> hive project. While soldering, though I had some serious problems:
> 1) I would solder one end of the wire, and when I soldered the other end,
> the heat traveled so quickly through the wire, that even if I just touched
> it for an instant with the soldering iron, the other end would melt and come
> off. I temporarily fixed that by using extremely hot hot glue on the joint
> to keep it on for an instant longer, so I could solder the other end.
> Anyhow, I have had some problems with this because it has separated one wire
> from it's adjoining one so there is no connection, and since I can't find
> this one solder bridge which I know is lurking around in there, it makes for
> some weird reactions when I test it for resistance with my Amprobe
> Multimeter (ancient, but mine at least).
> Is there any wire which would keep the heat from conducting so quickly (I'm
> using copper wire like in a telephone cable, my dad has tons and gave it to
> me).
> 2) I know my soldering technique deserves improvement (which I plan to give
> it this weekend), and I also know there is a solder bridge between one motor
> connection and ground, besides the gap I mentioned earlier which broke one
> connection. Any hints on how I can find it?
> I've eliminated flux, and a few spots, but I still can't seem to find it.
> I'm using a freeformed bicore from the tutorial on Ian's page, and I've
> added two photodiodes in a similar configuration to the bicore head circuit
> shown at BEAM Online. The motors are fairly efficient, right now I'm using
> two AA batteries (I can't get my hands on a 1381j or a 2N7000 for the PM1
> solarengine to power the bicore photovore) and overall, the connections are
> fine, except in that one area. I've checked with my Amprobe to be sure of
> that, and double checked too.
> Thanks very much in advance,
> Signing off,
> Rob Rix
>
> 'If anything can possibly go wrong, it probably already has'-Murphy's law

--
Chiu-Yuan Fang
chiumanfu@home.com
ICQ=5614919
http://www.geocities.com/SouthBeach/6897/beam2.html

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