# Copper Traces on Wood??

#### icor1031

Apr 27, 2010
65
I need a building platform about 7ft by 1inch and 1/4inch. Can't find PCBs that long, and if I did they would probably be very expensive.

Is it possible to create copper traces on a long piece of wood, or perhaps you have another idea for me?

#### TBennettcc

Dec 4, 2010
292
Straight up copper wiring?

Why does the board need to be that long? That thick? What are you trying to do? How many components are we talking? What kind of components?

Details, details, details...

#### icor1031

Apr 27, 2010
65
It's for this. This is my project, which is dead now.. Noob learning process.

It needs to be 7ft to go the whole length. I don't want to use multiple 11" PCBs because they wouldn't be very straight.

I will be putting LEDs on it. I haven't decided what kind yet. Probably 15k mcd 140º flathead LEDs, 20ma 3.2v (from memory). I don't know how many. I'm thinking 84 of them.

My car runs at 14.4v, with spikes to 14.3 and 14.5v. (I have ELMSCANNER to monitor voltage.)

#### davenn

Moderator
Sep 5, 2009
14,150
yeah ok, well to protect the LED's from the weather and other damage they would be to be housed in something waterproof. Say a clear plastic tube, you would then individually wire each lead to the next one. You may find you have to do them in groups of 5 or so.
no need for lengths of wood, pcb or things like that.

there's a section at the top of one of these forums that has an introduction to wiring up lots of LEDs

cheers
Dave

#### icor1031

Apr 27, 2010
65
The wood is a base so that they're all straight and facing the same direction.

#### davenn

Moderator
Sep 5, 2009
14,150
The wood is a base so that they're all straight and facing the same direction.

its under the car it wont matter, the wood wont last and would look rough.

they MUST be housed in waterproof tubing else they will short circuit the first time you go out on a wet road

Dave

#### icor1031

Apr 27, 2010
65
It matter to me if they're straight!!

I can put the wood in a plastic tubing or heat shrink, that's what I did on the last one.

It doesn't have to be wood, but I need a platform to keep them straight. Wire isn't going to do that.

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,508
If you want it to be self-supported, get some aluminium channelling or similar and place the LEDs inside that. Depending on the size of the LEDs, you may be able to attach them to the channelling, poke them through, or mount them on short lengths of PCB inside it.

Whatever you do, you will need to ensure it is resistant to vibration, and then encased in a plastic tube (or similar) to make it watertight. when you attach it to the car, make sure you don't have dissimilar metals touching, it's a sure way to get corrosion.

#### icor1031

Apr 27, 2010
65
Okay, if I use channeling, do I still have to use wires the whole length?

#### TBennettcc

Dec 4, 2010
292

https://www.electronicspoint.com/got-question-driving-leds-another-work-progress-t228474.html

Then, depending on which route you want to go, I might suggest the first method under section 2: wiring an LED and a resistor in series (x84 LEDs), and then connecting each of those assemblies in parallel. If the leads are long enough, you might be able to get with no wiring at all, apart from the initial connection to power at one end of the tube.

My \$0.02

#### poor mystic

Apr 8, 2011
1,074
Get an engineering shop to zinc-spray your wood (or whatever). Mask off the tracks with paper. You can solder to the zinc (if the 'whatever' won't melt under the soldering iron).

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