ZX-TEAM meeting and Webcam

From: Fred Cisin <cisin_at_xenosoft.com>
Date: Wed Mar 20 21:37:34 2002

On Thu, 21 Mar 2002, Tony Duell wrote:
> > Press-fit roll spindle with shaft encoder attached to one serial port on
> > a PDP-11 running a backround job counting total turns, comparing against
> Why use a serial port for this? Why not one of the pulse-counter cards? I
> think either the MNCKW (MInc clock module) or the KW11-K can be used for
> this.

Wouldn't the guts from a current cheap mouse work nicely for that?
> > Now how do you tell if the previous occupant actually washed their
> > hands?
> Detect water flow (trivial), reduction in weight of the soap (so you know
> some has been used), and (temporary) incresse in weight of the towel (so
> you know it's absorbed some water). OK, it doesn't actually prove that
> the soap/water were used on the person's _hands_, but...

measure increase in the turbidity, BOD5 (Biochemical Oxygen Demand),
D.O.(Dissolved Oxygen), and suspended and dissolved solids in the waste
water relative to the water supply. Fecal coliforms would be overkill,
and hard to automate.

A company that I once worked for installed water quality monitoring
equipment at Coors'. They were having major problems with calibration
until they realized that they had just found a BIG leak in one of the
tanks - saved the brewery many hundreds of gallons.
Received on Wed Mar 20 2002 - 21:37:34 GMT