RE: [Embedlets-dev] RE: Global Light Blinker -> can I propose the project?

[Christopher S. <cs...@oo...>]

Ted,

I have some relay boards available.

They connect to solenoid driven circuit breakers of the type used in
industrial (lighting) control. Their most important virtue is that they do
not require power after actuation. The internal mechanism latches
mechanically and holds the state set by either the on or off solenoid.

The boards are on a 50 pin cable that is driven by a Intel 8255 3x8 IO chip.

I will dig up the schematic and get it to you so you can determine if they
will work.

Chris

> Topic tags:[ARCH][JAPL][WIRING][DOCS][MGMT][STRATEGY][NEWBIE]
> _______________________________________________
>
> >I wonder if we could daisychain these units using your serial multidrop
> idea?
>
> Yes, I am certain we can..
>
> What we could do is have an 8-bit DIP on one port of the uVM device and
> read this in as the low byte of the IP address and have a fixed high
> byte then the we can have each one have a number of relays probably up
> to 16 or something.. So it would be easy to have 256 x 16 relays
> controlled via http JXTA proxies sitting off a single PC serial port. We
> could have a very simple board with a serial in/serial out port and
> space for a bunch of relays per board. We could easily have different
> sized boards for different numbers of relays per board.
>
> I especially like that it illustrates the use of the http proxy for the
> JXTA project and I think this is something that will really interest
> them also because it is not a 'proprietry' solution but a generic
> internet one. (HENCE) equally the boards can be all be address using the
> JAPL remoting stack, or as .NET proxies from a .NET application or
> directly from WinSOCK or basically any other way that put standard
> TCP/IP down that RS232 socket! SO there is good re-use outside of the
> JXTA proxy.. And this is also another reason not to use and depend on
> the 1-wire APIS' etc
>
> As for being ready.. Well I agree we nearly are. It would be nice to
> have this all working before we submit.
>
> PS. The document is coming together beautifully thank-you for your input
>
> James Caska
> www.muvium.com
> uVM - 'Java Bred for Embedded'
>
>
>
> -----Original Message-----
> From: emb...@li...
> [mailto:emb...@li...] On Behalf Of
> Ted Kosan
> Sent: Sunday, 6 July 2003 9:11 AM
> To: emb...@li...
> Subject: RE: [Embedlets-dev] RE: Global Light Blinker -> can I propose
> the project?
>
>
> Topic tags:[ARCH][JAPL][WIRING][DOCS][MGMT][STRATEGY][NEWBIE]
> _______________________________________________
>
> James wrote:
>
> > Well my thoughts are :
> >
> > * Make sure we are ready first
>
> What is your definition of ready?  To me ready means being able to
> control something that is inside of a NAT domain from out on the
> internet (the first thing that I am going to 'control' will just be a
> simulated light on the screen).  As soon as this is proven to work the
> rest is just plain embedded control stuff.
>
>
>
> > * As an additional type of relay I would like to write a uVM
> > controller with a jxta http proxy :-) - then we can use the regular
> > serial connector and won't need special 1-wire translator and special
> > dallas iButtons at the relay end.. Also would be cheaper to throw a
> > uVM-877A a few relays and a regular serial cable into any 'DIY' kit..
>
> James, this is a great idea!  The hardware configuration that I was
> originally considering was looking fairly expensive but a pure
> serial/uVM solution appears like it could be quite cheap.  I wonder if
> we could daisychain these units using your serial multidrop idea?
>
> Anyway, the JXTA project submission guidelines indicate that project
> proposals need to be discussed first and in the initial proposal that I
> would put together I would just say that the Embedlet Group would allow
> the JXTA nodes to control simple home appliances like house lamps.  I
> will not commit to any specific way of how this will be done and I will
> refer to the hardware in strictly abstract black-box terms.
>
>
> Ted
>
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