Relaying power, arduino to arduino.

Using Arduino Project Guidance
#1

Would it be possible connecting multiple arduinos together, say 100 of them.
All being powered from one end?
Not using any batteries at all.

So arduino nr 1 connected to power, and then relays power to the next and next.. etc etc.

Im not talking about sending data or anything like that here.
Thx!

#2

No you cant, all power used down the chain will have to be provided by each upper link.
What stops you to power them in parallel from one, sufficiently big source?

#3

oh no..
well its hard to explain..
but it could not be parallel :frowning:

#4

How do you mean, it's hard to explain? Give it a shot.

#5

well i have another post about it here:

so i have nodes connected togheter, and it wouldent be feasable to have a cable to every node.
they need to connect on one side.

but if there is no way of giving the microprocessor power, it might not even be possible.

#6

I don't see the problem. When power wires arrive at a node, split. On part goes to arduino, other part goes to next node.

#7

Oh, so high voltage would have to run through the system?
Sorry im very novice.

How would the split work?

#8

Which high voltage?

Something like this: choc block

Cut into pieces of two. 2 wires (plus and minus) come in at one side, 2 x 2 wires come out at the other side. One pair to Arduino, other pair to next Arduino?

Of course you can use fancier connectors; maybe 9pin subD to carry power and signal.

    node enclosure        node enclosure
   +---------------+     +---------------+
   |               |     |               |
   o---------+-----o.....o---------+-----o..... 
   |         |     |     |         |     |
   o--+----- | ----o.....o--+----- | ----o.....
   |  |      |     |     |  |      |     |
   | minus  plus   |     | minus  plus   |
   |   Arduino     |     |   Arduino     |
   +---------------+     +---------------+

I can't advice what voltage I would use for the power supply. If longest distance is relatively short, your power supply can be 5V and must deliver sufficient power to feed all nodes; thick wire will help to reduce loss.

For longer distances you're probably better of with 9V or 12V power supply and convert the voltage down at each Arduino. Others might be able to advice better.

#9