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Old 09-30-2017, 11:58 AM   #11 (permalink)
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Default Re: SMD LED tape based light fixture





After drilling and deburring 78 holes, I finally got the heatsink assembly screwed together, with all of the wire routing holes in place! I still need to find my sockets in my mess in the garage, so I can finish tightening all of the screws, then filing the edges of the end pieces to fit better, then thoroughly cleaning the aluminum, then designing and installing the cantilever that will hold this above the tank. Only then can I start sticking the LED tapes in place. It's a good thing I enjoy this stuff!
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Old 09-30-2017, 12:29 PM   #12 (permalink)
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Default Re: SMD LED tape based light fixture

How warm do you feel this is going to be? That was my first thought when looking at adhesives, silicone or tapes to use. I find one way to release lots of silicone and adhesives is heating them.
But for that I'm using a torch and that may leave a wide spot where the heat from LED is not enough to matter while a torch would be much hotter.
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Old 09-30-2017, 02:03 PM   #13 (permalink)
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Default Re: SMD LED tape based light fixture

I doubt the heatsink will ever get above 110F. The last one I made didn't ever feel more than slightly warm. Silicone caulking is good to a much higher temperature than that. The self adhesive tape on the LED strip might eventually give way at that temperature, which is why I plan to rely on the silicone caulking to hold the LED strip to the heatsink.
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Old 10-01-2017, 08:24 AM   #14 (permalink)
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Default Re: SMD LED tape based light fixture

Silicone is definitely the easier way to go then!
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Old 10-02-2017, 09:46 AM   #15 (permalink)
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Default Re: SMD LED tape based light fixture




The cantilever beam that will support this over the tank is now installed. Now I need to work on attaching the drawer slide system to the stand, to hold the light.
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Old 10-02-2017, 09:49 AM   #16 (permalink)
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Default Re: SMD LED tape based light fixture

Looks really good hoppy, good luck!
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Old 10-03-2017, 12:20 PM   #17 (permalink)
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Default Re: SMD LED tape based light fixture

After several attempts to design this I finally found something that will be possible to make, will fit, and can be installed without emptying and moving the tank. Here is the vertical support bar, with the drawer slide attached:
and the bar temporarily in place behind the tank:
The bar is a 3 foot long 1x2 poplar board. There is just enough room between the drawer slide an the back of the tank to attach the light support bracket (I hope!)

The hardest part of this has been working inside the tank stand, at the back of it. I'm a bit past the age where this is easily doable.
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Old 10-04-2017, 12:08 PM   #18 (permalink)
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Default Re: SMD LED tape based light fixture



I gave up on the cheap support cantilever bar - It was looking bad, and was too difficult to get all of the pieces to fit together right, plus I accidentally made it an inch short. So, I spent another $12 on a 3 foot length of 3/4 inch square aluminum tubing and made this one, which looks a lot better and is the right length.

My total costs are now $129!
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Old 10-04-2017, 12:52 PM   #19 (permalink)
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Default Re: SMD LED tape based light fixture

130$ isn't that bad really. Especially SO FAR for an LED DIY light. What was Seans total cost to his like 1500$? plus he never finished it.
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Old 10-04-2017, 01:17 PM   #20 (permalink)
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Default Re: SMD LED tape based light fixture


The new cantilever beam attached to the heatsink. I think next will be attaching this to the drawer slide, but that's not for today. If I haven't mentioned this, the wiring all goes down the center of that square tube, to the 12 VDC power supply under the tank.

$130 isn't bad, if this does what I expect it to do, and I again checked my calculations on what PAR I can get, and still think it will do it. Of course this is also more entertainment than a NBA game, for me, so I suppose you could just write it off as part of my entertainment budget.
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