On Sunday, January 29, 2012 12:53:20 PM UTC-8, Simon Field wrote:
Suppose you have a PDMS sheet above a network of channels, so thatpushing down on the sheet above a channel cuts off the flow.
Previously I thought dot matrix printer heads could be explored here. Though never did the calculations for required displacement. I'm sure some printer heads move several mm's for imprinting in carbon paper (just guessing). With 12 or 24 pins per head (or more?), that might yield control over a couple of intersections depending on channel size and density. Cost might be cheap or free. Solenoids use a good amount of current and require maintaining the current in the forced position, so could result in problems with power & heat at high densities. And don't get liquid in or on the head or it will likely jam & need cleaning - but otherwise that technology is rock solid.
## Jonathan Cline
## jcline@ieee.org
## Mobile: +1-805-617-0223
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