[TriEmbed] Question concerning a mechanical release

[Glen Smith]

I see that others have chimed in with some possible solutions, if I'm too
late to the party, that's just how things go for me.

http://www.adafruit.com/products/1512

Adafruit has three different solenoids that might work, 2 marked as 9-24v
and the one linked above which is listed as 9-12v. Personal experience with
the large 9-24v one indicates that less than about 18v gives less than
satisfactory results - especially if the magnet needs to pull against
gravity or any other frictional or weight resistance. But with a good
MOSFET and protection diode, these can be simply actuated by TTL levels.

Hope this helps.
Glen


On Mon, Sep 23, 2013 at 6:57 PM, Lucas Rumney <lrrumney at ncsu.edu> wrote:

> I am trying to make something that would achieve the following end:
>
> raspberry pi being able to release a weight on a string.
>
> 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?
>
> Does anyone have any better ideas how to release a weight on a string
> controlled by a pi?
>
> Thanks, I can't attend this meeting because of my courseload, but I still
> want to participate in general discussions.
>
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>
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