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<div class="moz-cite-prefix">This is the old "release a ball bearing
at the top of a track, and watch gravity take it through a
Rube-Goldberg style rig". It pays to keep around those old 1950's
and 1960's science and experiments books.<br>
<br>
Anyway, I would use a small box with a hole in it large enough for
the weight to pass through. Blocking the hold underneath would be
a small piece of bar stock, fastened at one end so the swinging
end blocks the hole. Then you can use a solennoid connected to
the middle of the barstock, wired so that a signal applied to it
activates the solennoid, which in turn pulls (or pushes) the
barstock from under the hole, and weight drops down.<br>
<br>
There used to be a project in the large Erector Set kit that was
exactly like this -- that you might find drawings of on the
internet.<br>
<br>
On 09/23/2013 06:57 PM, Lucas Rumney wrote:<br>
</div>
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cite="mid:CACCReN+vHPbVJDQR0g4c7tPm9hSXA9uomAY5itSLLaWBng=CaA@mail.gmail.com"
type="cite">
<div dir="ltr">I am trying to make something that would achieve
the following end:<br>
<br>
raspberry pi being able to release a weight on a string. <br>
<br>
My idea was that the pi could send a signal to disengage some
kind of clamp and release the weight, but I am not sure what
kind of clamp or what I should use here?<br>
<br>
Does anyone have any better ideas how to release a weight on a
string controlled by a pi?
<div><br>
</div>
<div>Thanks, I can't attend this meeting because of my
courseload, but I still want to participate in general
discussions. </div>
</div>
<br>
</blockquote>
<br>
<pre class="moz-signature" cols="80">--
Scott G. Hall
Raleigh, NC, USA
<a class="moz-txt-link-abbreviated" href="mailto:ScottGHall1@GMail.Com">ScottGHall1@GMail.Com</a>
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