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61  Using Arduino / Project Guidance / Re: "Smart" Power Strip on: June 29, 2012, 10:02:37 am
Of course smiley. Let me rephrase that: how big are the Ethernet and SD + FAT32 libraries in the worst case?
62  Using Arduino / Project Guidance / Re: "Smart" Power Strip on: June 29, 2012, 07:17:38 am
Can anybody please give me a hint about how much size does an empty sketch take, when linked to the Ethernet and SD + FAT32 libraries?
63  Using Arduino / Project Guidance / Re: "Smart" Power Strip on: June 26, 2012, 02:23:15 am
I guess I will have to go that way. Fortunately, the LCD will be a later addition and by then, hopefully, I will have improved my soldering skills! smiley-cool

64  Using Arduino / Project Guidance / Re: "Smart" Power Strip on: June 25, 2012, 03:57:09 pm
Thanks a lot! I had seen that screen, but unfortunately it is sold out. Do things on nuelectronics usually come back in stock?

It seems that many of the Arduino-related things I'd love to get are always out of stock! smiley-yell
65  Using Arduino / Project Guidance / "Smart" Power Strip on: June 25, 2012, 07:57:28 am

I have just discovered the Arduino world, and I thought I would use it to do something I've been longing for for quite a while.

Basically it would be a "smart" power strip. Let's say 2/4 220V (I live in Italy, you know smiley-cool) sockets that con be powered on/off according to various criteria:

- Always ON
- Always OFF
- ON when the temperature goes ABOVE a certain threshold
- ON when the temperature goes BELOW a certain threshold
- ON at a certain time

The criterion will be configurable per socket, through a web interface which will also allow access to the current status. It would be an improved version of what can be seen at, as I need all of this for various things I'm doing smiley.

Thus, some questions:

  • I'm thinking about using the Arduino Ethernet, it has everything I need and is a bit cheaper than a 2009/Uno + Ethernet Shield. Any other ideas? Luigino + Ethernet shield maybe?
  • Is there any LCD shield that is compatible with the Arduino Ethernet? This would be a later addition I'd love to make, but unfortunately all of those I've seen seem to use digital I/O 10, which is reserved for the embedded Ethernet controller. The ATS-1 ( seems good, but it sounds very expensive to get it from the US. I know I could wire my own LCD screen, but I'm bad at soldering, and I would happily avoid that. Plus it would be nice for my project to be entirely made of readily available parts so that everyone could build it quickly.
  • As a temperature sensor, I chose the DS18B20, as it is digital, allowing me to use longer cables, plus it is already available in a waterproof version (, which is what I need. I might as well use a thermistor, but that is more complicate, requiring a parallel resistor, soldering, etc, which - again - I'd happily avoid smiley.
  • On the software side I should have no problems, as programming is my job. Just one question: do you think the flash space on the ATmega328 will be enough for my project? I fear it might be too little, since I will need to use the Ethernet, SD, and - later - LCD libraries. At least I plan to put the HTML files on the SD card.

That's all for the moment, thanks in advance for any replies!
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