home automation question

[Erez D]

On Wed, Apr 21, 2010 at 3:55 PM, Itay Donenhirsch <itay at bazoo.org> wrote:

> hi
> if you already mentioned avr and would like to build things yourself then
> you can definitively build it yourself, see
> tuxgraphics.org/electronics/200606/article06061.shtml (you'll need an
> enc28j60 as well).
>
> you can buy avrs through ebay/digikey/mouser or in israel either arihav or
> some stores in shdreot bnei zion, ta.
>
>
thanks. but it still seems too expensive and time consuming.


> <http://tuxgraphics.org/electronics/200606/article06061.shtml>a question
> though - why ethernet of all things? why not lay an rs-232 cable (avrs got
> internal uart for that) + max232 for the voltages and be done with it?
>

1. i have ethernet. i do not have rs232. that's what i have.
2. rs232 specs say it is for 15meters (which is too short anyway)
3. only one computer can connect to an rs232. so i need to set up a server
for the rs232 <-> ethernet, which i do not want to.


> itay
>
>
> 2010/4/21 Erez D <erez0001 at gmail.com>
>
>> hi guys.
>>
>> i have a warehouse. it has two connections to the buildings - power and
>> ethernet.
>>
>> i want to control the warehouse external lights from the house.
>>
>> I thought of buying an X10 light switch, but it seems that each consts
>> around 50$, which is expensive
>> so my other option is a computer i can control (prefferably a linux box,
>> somthing like nslu2).
>>
>> so:
>> 1. anybody knows of a cheap place to buy X10 stuff (or somthing similiar)
>> ?
>> 2. what is the cheepest "computer" (doesn't have to be a full computer, an
>> avr with ethernet and gpio will do) ?
>>
>> thanks.
>> erez.
>>
>> _______________________________________________
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>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>>
>
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