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1  Using Arduino / Networking, Protocols, and Devices / Re: How can I change variables over network.... from web page form? on: June 03, 2014, 09:53:59 am
Hi,

Thanks,

It'll take a bit of time to work through but I think it's probably got what I want in it somewhere.

Cheers

Ron
2  Using Arduino / Networking, Protocols, and Devices / Re: How can I change variables over network.... from web page form? on: June 03, 2014, 01:50:57 am
Hi,

Errr....the the Ethernet card is still on its way in the post to me....so very very new to it.

I've tried to find a tutorial but without any luck, so if you know of one please post the link...but I think I also need another tutorial on how to find a tutorial out in the infinity!

Cheers

Ron
3  Using Arduino / Networking, Protocols, and Devices / Re: How can I change variables over network.... from web page form? on: June 03, 2014, 01:38:04 am
Hi and thanks,

Forgive me for being a bit thick but I plan to have the Arduino on a timer so that it switches on in the morning and switches off overnight. Will the  variable I set via the web page be stored so that after switching everything off and on again it is still there?

Cheers

Ron
4  Using Arduino / Networking, Protocols, and Devices / How can I change variables over network.... from web page form? on: June 03, 2014, 01:01:51 am
Hi,

I'm quite new to Arduino (and learning slowly) and planning a project at this moment. It is to control the humidity in a glazing system. The task is to monitor 8 sensors and switch on 1 of 8 pumps when the right humidity condition has been met. So far I've got 8 inputs (from the sensors) and 8 outputs (to the pumps); I'll probably add a simple LCD display (one of those 16 x 2 ones) and link it all in to my home network.

I've ordered a Mega and Ethernet shield, which should arrive shortly.

I'm trying to work out if it is possible to alter the humidity threshold point over my home network from say a web page form or similar. Not sure how this should be done, do I need to save a web page on the SD card and store the humidity threshold points as variables and then call them from the Arduino sketch? Presumably there is a better way of doing this or a tutorial on this sort of thing?

Any advice much appreciated.

Cheers

Ron
5  Using Arduino / Displays / Re: LCD advice...trying to find one like in my watch on: May 29, 2014, 06:08:03 am
Excellent explanation.....now why couldn't I find that out!?

So reflective is what I need...eBay here I come (again)

Cheers

Ron
6  Using Arduino / Displays / Re: LCD advice...trying to find one like in my watch on: May 29, 2014, 01:54:50 am
Hi,

Thanks for the replies. I'm fairly new to all this Arduino stuff (and thoroughly enjoying it), so appologies if the question was a bit on the thick side!

Either one will do, but I quite like the Nokia as it's got a few more lines available...besides it's got that nostalgia feel.

I've come across TN STN FSTN Reflective Transflective Transmissive but what do they all mean....any good guides about?

Cheers

Ron
7  Using Arduino / Displays / LCD advice...trying to find one like in my watch on: May 28, 2014, 04:54:07 pm
Hi
I would like to find a simple LCD 16x2 display which is looks like the ones in digital watches. The sort which is black text on grey background and doesn't need a backlight.
Problem is I don't know what this sort of display is called. Plenty of blue and green ones which need a backlight but I can't find the plain type.

Can anyone tell me what to look for?

Cheers

Ron
8  Using Arduino / Project Guidance / Re: Have I got enough pins in my Uno or should I use another board...? on: May 25, 2014, 02:01:11 am
Hi,

Been mulling this one over a bit and 'cos I'm a bit new to all of this I'm not too sure where my imagination will take me (could mean more and more pins!) …..so I think I'd better go for a Mega.

Wouldn't mind trying out a clone board (possibility of saving a few quid...not a bad idea) so after a bit of Googling I'm not sure if there is one brand better than another. I'm looking for a Mega and an Ethernet shield. Funduino and Sainsmart seem to figure a lot. Sainsmart do both boards and Funduino are common on eBay. Any suggestions much appreciated.

Thanks for all the help

Ron
9  Using Arduino / Project Guidance / Re: Have I got enough pins in my Uno or should I use another board...? on: May 23, 2014, 02:01:33 pm
Hi and thanks,

West Wales....miles from anywhere. We're used to getting this sort of thing mail order.

Cheers

Ron
10  Using Arduino / Project Guidance / Re: Have I got enough pins in my Uno or should I use another board...? on: May 23, 2014, 01:34:30 pm
Hi,

I ordered the 74HC595N  mainly to experiment but I'll get a TPIC6B595 for the proper project.

Presumably I'd have to use a ULN2803 type driver for those relays if I used a Mega?

Haven't really found a good source in the UK yet for Arduino boards or copies....no doubt there is somewhere. If not then I can always buy from the USA (where the prices seem to a lot cheaper!)

Many thanks

Ron
11  Using Arduino / Project Guidance / Re: Have I got enough pins in my Uno or should I use another board...? on: May 23, 2014, 12:42:15 pm
Hi and thanks for all the replies.... a lot to take in....penetrating slowly.

The shift register route seems like quite a good one if I could get it to work. The relays I plan on using are made by Finder and have a 12v coil and draw about 45mA so if a TPIC6B595 can switch this then it'll save me making up transistor buffer. Any rate, I've ordered a 74HC595N from CPC in the UK http://goo.gl/pejJ91 so that I can experiment....probably something I should know about.

However the idea of all those pins on a Mega is very appealing, but are there good and reliable copies made which I can get in the UK? Or should I think about buying from abroad?

Many thanks

Ron
12  Using Arduino / Project Guidance / Re: Have I got enough pins in my Uno or should I use another board...? on: May 22, 2014, 02:34:22 pm
Well, seeing as saving on pins is the game then I could stretch the budget to a serial display.

The pumps are 8w 240v and switched with some finder relays 12v so will still need some transistor setup.

Cheers

Ron
13  Using Arduino / Project Guidance / Re: Have I got enough pins in my Uno or should I use another board...? on: May 22, 2014, 02:07:19 pm
Hi,

That all looks excellent and I'll definitely go down the road of either solder up a pcb (or veroboard) or use a Pro Mini or similar.

Back in the early '70s I did do some electronics at college. That was a long time ago, components were a lot bigger and making pcbs with copper clad board, indelible felt pen, mini drill and ferric chloride was easy enough. So I'm certainly up for a bit of soldering.

So this TPIC6x595 sounds a good idea....where do I start with finding out more about how to use it?

Many many thanks

Ron

PS Here is a link to a page on Instructables. The LCD I'm using is the same as this one.
http://www.instructables.com/id/Arduino-TempHumidity-with-LCD-and-Web-Interface/?ALLSTEPS
14  Using Arduino / Project Guidance / Re: Have I got enough pins in my Uno or should I use another board...? on: May 22, 2014, 11:42:28 am
Hi,

Quick reply, thanks.

My Uno came was part of an entry level kit with and it came with a display, presumably this is a parallel connection? So a serial one is the answer.

I'm using DHT22 digital sensors and I'll do as you say with transistors to switch the pumps.

This is a bit early I suppose but I plan to build this into a box etc and I think it would be a good idea to make the wiring a bit more permanent.

What do others do? Buy a pcb and the components to copy their Arduino circuit or is it best to buy another Arduino?

Where do I start on this part of the project? (you can tell I'm new to all of this!!)

Cheers

Ron
15  Using Arduino / Project Guidance / Have I got enough pins in my Uno or should I use another board...? on: May 22, 2014, 11:09:39 am
Hi,

Still a bit of a newbie but learning fast.

My current project is to control the humidity in a glazing system. The task is to monitor 8 sensors and switch on 1 of 8 pumps when the right humidity condition has been met. So far I've got 8 inputs (from the sensors) and 8 outputs (to the pumps); I'll probably add a simple LCD display (one of those 16 x 2 ones) and link it all in to my home network.

At the moment I'm doing all my learning and this project on an Uno; which has got the 20 pins.

My questions are:

Will the Uno have enough input/output pins to do all of what I plan to include or should I use an Arduino with more pins (Mega?).

If I need to use a Mega then would the sketch I'm working on for the Uno be transferable to the Mega without too much ado?

Cheers

Ron
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