[ELECTRON] Commissioning Help!!

[Grant Gibson]

Hi Natalie

Sorry to jump in to the middle of a conversation here, but just a few
thoughts:

The pulse sensor you're planning to use is designed for Arduino, so basing
the project around an Arduino board would probably be a good way to go.

If you're going down the Arduino route, you could build the whole thing
quite easily without any 'real' electronics work - i.e. no raw components,
no soldering, and just some plug in wiring.

My idea is to use a simple relay board - like the Sainsmart 2 channel relay
which would act as a simple on off switch for other devices (which
could be either
12V, mains voltage or whatever). Those other devices would be: a) a pump
like you've already got planned, and; b) a solenoid water valve for the
return.

Then the only work is programming the arduino. There will be freely
available sketches to read signals from that pulse sensor, so you'd
literally just be adding half a dozen lines to set the relay switches
'high' or 'low' as required.

Unfortunately work and family commitments mean I wouldn't have time to help
hands on, but if you go down that route I'd be happy to help by email if
that's useful.

Cheers
Grant


On Wednesday, December 18, 2013, Natalie Duncan <06duncan at gmail.com> wrote:

> Hi Gordon,
>
> Here are the basic components Im looking for;
>
> A pulse sensor that will read a forefinger pulse. I am currently using
> this one ( http://pulsesensor.com/) , I could also build my own using an
> IR and a receiver, or ty another pulse reading sensor with analog output.
> If my own IR is made, residual light will probably be a concern.
>
> The sensor will activate a submersible pump, preferably at 12v.  We are
> not moving a substantial amount of fluid… probably about a pint.  ( I am
> currently not using a submersible pump)
>
> When a person places their finger on the sensor it will start the pump,
> the pump will then prime and liquid will begin to flow along a tube about
> 3-4 feet in length, velocity is not a concern as of now, the fluid will not
> be drawn very high, perhaps about a foot out of the receptacle.
>
> The fluid will continue to pump until the finger is removed. Once the
> sensor recognizes that the finger is removed the pump will stop, but then
> the tricky part is having all the liquid drawn back into the receptacle.
>
> Separately a 24/rpm rocker will need to be fabricated to sit inside the
> receptacle or outside of it to continually "rock" the liquid to prevent it
> from coagulating but I could certainly do this on my own. My main concern
> right now is getting the sensor working with the pump and the liquid
> draining from the tube until the next pule activates it.
>
> Hope this clarifies.
>
> I would really appreciate working on this project with someone with a bit
> more expertise than myself. All my electronics knowledge to this point is
> self taught. So while I am capable of following a schematic I am not sure
> how to devise my own circuits.
>
>
>
> On 2013-12-18, at 9:47 PM, Gordon JC Pearce wrote:
>
> > On Tue, Dec 17, 2013 at 09:37:17PM +0000, Natalie Duncan wrote:
> >> Hey there,
> >>
> >> i am looking for someone who would be interested in working on a
> circuit with me (not completely solo) for compensation… I currently have
> the majority of the piece working with Arduino but am very interested in
> moving this to an analog form.
> >>
> >> The piece will essentially be a pulse sensor activating a self priming
> pump. However once the sensor is no longer activated all liquids remaining
> in the "tube" will need to drain back into the original receptacle.
> >
> > Have you got an idea of how the pump and valves will work?
> >
> > What exactly do you mean by "pulse sensor"?
> >
> > --
> > Gordonjcp MM0YEQ
> >
> >
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