Re: idea for microfluidic valving

I was playing around with NiTi springs + steel wire (attached to the
end of a spring, formed into a loop) to control the flow of microbore
tubing by crimping it with the loop of steel wire awhile back.  Pretty
cheap, need to include a temperature sensor with the NiTi spring to
prevent it from overheating or keep it submerged in water - other than
that, they run about 5-20 cents (depending on sources of tubing and
NiTi) a piece in parts - and have the potential to control multiple
tubes in a single valve.

On Jan 23, 2:52 am, Nathan McCorkle <nmz...@gmail.com> wrote:
> these valves work on pneumatic/hydraulic pressure, basically like

> stepping on a water hose to stop the flow.http://www.stanford.edu/group/foundry/Microfluidic%20valve%20technolo...

>
> if one would want to control hundreds or thousands of valves at a
> reasonable cost... I'm wondering if you could acquire small hollow
> electromagnets to use as a solenoid directly on the membrane, or as a
> single-channel displacement pump.
>
> I'd like the cost per valve to be about $1-1.50 USD. It seems like

> these would work but @$3-4 per valvehttp://www.ebay.com/itm/Miniature-ODV76-L92121-P2-Linear-Bi-Direction...

>
> I feel like Simon could really chime in with some good perspective on
> this, is this something that would be low enough force that I could
> wind the coils and build all the tiny solenoid/pumps?
>
> --
> Nathan McCorkle
> Rochester Institute of Technology
> College of Science, Biotechnology/Bioinformatics

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