At 03:05 PM 11/16/2005 +0000, you wrote:


>Whenever I've made projects on stripboard that use PP3 type batteries, I=
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>thread the wires through a couple of holes to provide strain relief e.g.=
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>wires goes into a hole from component side, back up another hole and the=
n=20
>into the hole into which it will be soldered.  As long as the holes are =
of=20
>a similar diameter to the wire, it holds very well.
>
>Regards
>
>Mike

For this sort of thing, if there is room, I like to go one step further a=
nd
put large rectangular (with rounded corners) pads on the board radially
disposed around the strain relief hole (in this case there might be a 30=B0
angle between the two pads). The wires are threaded through the hole
(make it as snug as possible without making it difficult to thread the
wires through), laid against the pads and soldered flat, with a nice big
blob of solder. You can tie a knot in the wires to get more strain
relief. Laying the wires against the pads that way prevents vibration
failures, there are no sharp transitions (like where the solder runs up
the wires) and no weak spots (and possible nicks where the stripping took
place are protected).

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rew=
ard"
speff@interlog.com             Info for manufacturers: http://www.trexon.=
com
Embedded software/hardware/analog  Info for designers:  http://www.speff.=
com
->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZs=
peff



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