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 Post subject: Arduino temperature monitor
PostPosted: Thu Jun 10, 2010 11:04 pm 

Joined: Mon Mar 01, 2010 12:23 pm
Posts: 2
Location: Madison, WI
I finished it last year, finally got around to writing it up a bit.

http://pages.cs.wisc.edu/~timc/e/nh3.html

An arduino board with a bunch of 1-wire temperature sensors connected to an anhydrous ammonia applicator for the purpose of sensing flow problems.



So....does anyone know of a source for a decent LCD shield?

I've found a few. Some have buttons which would be great, but they also assume that you're going to use a 2x16. My preference is for the 4x20 which would obscure the buttons. A couple others come with extra junk I don't intend to use. There's another I found on a german site, but can't tell that it's actually for sale.

If I build another of these, I'll probably opt for a 2x16 shield, remove their 2x16 and attach the 4x20 and relocate the buttons or something like that.

???

--T


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 Post subject: Re: Arduino temperature monitor
PostPosted: Fri Jun 11, 2010 8:25 am 
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Joined: Tue Feb 23, 2010 4:47 pm
Posts: 21
Location: Eastside Madison
Is the shield a requirement? I (and other forum members) would be happy to help you integrate a LCD directly or to design and etch your own custom LCD shield.

Can you rough out some specs for the size and placement of the LCD?


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 Post subject: Re: Arduino temperature monitor
PostPosted: Fri Jun 11, 2010 10:27 am 

Joined: Mon Mar 01, 2010 12:23 pm
Posts: 2
Location: Madison, WI
Strictly speaking, a shield isn't a requirement, but it's cleaner than a bunch of wires between a display and a board.

I can also etch boards in my workshop. In my opinion, one of the best features of an arduino is that it's cheap. For ~$30 delivered I don't think I can even begin to consider designing a board with USB, power regulation, reset. And etch. And fix my screw-ups. Especially for a 1-off.

I found this unit late last night:

http://www.criticalvelocity.com/item.php?itemid=shield9

I think that's as close as I'm going to get.

WT9M found this one:

https://www.argentdata.com/catalog/product_info.php?cPath=22&products_id=136

...which is interesting, but more functionality than I'd use.

And finally, this one:

http://www.watterott.net/projects/s65-shield? is maybe what I really want.


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 Post subject: Re: Arduino temperature monitor
PostPosted: Fri Jun 11, 2010 10:51 am 
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Joined: Tue Feb 23, 2010 4:47 pm
Posts: 21
Location: Eastside Madison
I was more suggesting to etch an LCD shield. I'll look at those links when I get home.


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 Post subject: Re: Arduino temperature monitor
PostPosted: Tue Jun 15, 2010 11:48 pm 
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Joined: Sun Feb 14, 2010 9:29 pm
Posts: 84
Location: Downtown/Campus - Madison, WI
For the price on those LCD shields you aren't going to do much better! You can buy them roughly wholesale from China at $4/screen:
Sure Electronics LCD

but try designing and etching and populating that shield for $9. . .

If you needed the pixel based screens you'd have trouble finding them this cheap though.


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