/diy/ - Do It Yourself

>>628155
> besides throwing them away

I hope you meant "besides recycling them".

JUse the Milton Bradley game "Operation" as inspiration.

>>607320
Nope. Parallel programming experiments.

I've been tossing around the idea of building my own computer cluster for a while, possibly using an Ikea Helmer cabinet as an enclosure (like the Helmer-Air project). However, I'm OCPD and would want to cut the fan holes to be perfectly round (not simply using tin snips). Is there a simple way to accomplish this?

Have you considered shapeways?

>>599492
Most stores only stock USB cables that are 6ft or longer. Even Monoprice's shortest is 18in.

http://www.monoprice.com/Category?c_id=102&cp_id=10303

Modular Anderson Powerpole connectors are the best.

How about using an Ikea Helmer cabinet?

http://www.helmer-air.com

I suppose this should go in the DIY section as I did it myself. I hope you all enjoy me talking about Margaret Thatcher. There are others, but you can find them yourselves.

http://www.youtube.com/watch?v=bxLSBIHpCbo

I'm a dirty skank! And I lie! Text me =)

Sorry anons, I've been away for a few days.

>>186324

Depends on the kind of coral. Some grow relatively quickly, others it takes years.

LPS for example typically grow pretty slowly while SPS tend to go a bit faster as do Octocorals, Polythoa, Zoanthids, etc.

>>186325

This would have created spotting the further down the light goes, as well as spillage with an optic.

>>186330

It is on the returns, light spread, electricity usage, heat dissipation, etc.

The fixture covered a six foot by two by two tank.

>>186355


Yes you can. As for the anon who stated that LED's have straight forward light, this isn't correct. Without lenses or a reflector you'll have a 180 degree spread of light. Therefore, lenses (optics) are needed to focus the light.

For my fixture I used 90 degree optics/lenses.

>>186340

Because an LED fixture needed to support the growth of coral at the size I needed it would have cost around three to five times as much depending on the brand.

>>185358

That wasn't me...

Finally-

If I can provide any help, feel free to ask.

Completed with Semi-gloss.

You can also see a completed array next to it with attached optics.

Further with some staining.

I needed something to hold the LED's, etc. So I made a wooden fixture.

And here's an individual set of 12, soldered, ignited and tuned.

From here you repeat the same process over and over until everything is complete.

A safe running area is around 800 MA. Here you can see on the multi that it's at 780.

Now we hold our positive wire to the incoming current and through the multi-meter back to the actual array.

Now to ignite the LED's, we have to supply power from a DC adapter into the potentiometer box, then turn the dial.

LED's take a varied amount of Miliamps. Too high, they'll explode, too low and you get little light.

So we have to tune the driver and test with a multi-meter.

This is the top removed from the driver. You can see the white screw which when turned alters the MA.

Now we need to wire the cords coming from the driver into the potentiometer and DC connector.

Potentiometer

DC connector

Now we need to construct or dimmer switch.

You'll need a project box, a DC connector and a potentiometer.