I am trying to automate my staircase lights now.. there are about 6 of them.. right now my electricians have setup it all with 2 way switches.
each 2way switch is connected to 2 lights at a time. so switching them on will set 2 lamps to be on at a time.
I have an arduino, and have a fairly basic understanding of how things work in this regard and how to use digital signal to trigger relays with transistor.
Now question is in the actual implementation.
I have like 3 PIR sensors.. that i would place at 3 places on 3 floors to detect movement and use that inputs to trigger my lights.
How do i run these small wires over a longer distances? say about each floor is atleast 12 feet high.. will digital signals/voltages go over 36 feet easily?
Can i buy a wire like this ?http://www.ebay.in/itm/90-Mtr-Wire-for-Automatic-Water-Level-pump-Controller-4-core-multicore-cable-/221144434490?pt=LH_DefaultDomain_203&hash=item337d3c473a&_uhb=1#ht_709wt_906
or a normal twisted wire ( one they use for small speakers) will do the job? , I can buy the normal jumper wires i used to experiment for longer distances but worried this could easily damaged on longer term// also dont know much about voltage drops,etc.
I heard on this forum that I cannot pass these wires together with the AC grid wires, should i use seperate pipings? I would love have it as internal wiring. any options here?
Another unrelated question about the Relays
I am thinking to buy a relay control board like this http://www.simplelabs.co.in/content/simple-labs-relay-control-board-3-relays
There is also 4/ 8 relay boards like this in ebay, will this do the job? i am worried abut drawing too much current out of the arduino and exceed the limits.
how many relays is safe to run on the same power adapter? or from the arduino 5v itself?
I plan to learn things with this 6 lights to start.. I would love to control them all separately but even if I wire them in 2 pairs so a relay controls 2 lights, im fine with it.
then slowly add other room lights into the mix.. how do this scale..
how many arduino's(Mega) I m going to need to completely automate the home lights and fans.. which is about 14 in total.
I would also get a Raspberry Pi for web control for all my lights/fans very soon , may be use this as the base station
I am much better at software side of the things than the hardware wiring,etc . I can code my own android/iphone and web app that controls this easily .
I did try to google a lot/etc, I couldnt find all the answers there. I started with arduino like 2-3 weeks ago sorry for all the silly questions if they are.
Is there any open systems like "open energy monitor" for home automation so I am better off purchasing all the components and use the set standard instead of redoing it.