Thread by burn the bridge

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  • Feb 2, 2022
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1/17 Build your own #Bitcoin home mining enclosure for under $150, with a 20dB attenuation.

A thread based on a DIY indoor version of @SGBarbour's #BlackBox
2/17 This thread is the short version of the full @upstreamdatainc DIY guide which can be found in this GitHub repo. Feel free to get in there, make pull requests for different materials you have tried, or to get different design variations included, etc.

github.com/econoalchemist/UpstreamData-DIY-BlackBox
3/17 The intent of the #BlackBox is to allow the user to run their mining ASIC hardware outdoors where the heat and noise could more easily be controlled or dissipated. Excessive heat & noise are common problems users experience when mining #bitcoin in the home or working space.
4/17 For those with a DIY attitude, you may be looking for some guidance on building your own low-cost, indoor version of the #BlackBox. With less than $150 at Home Depot, I bought a sheet of OSB, asphalt board, 3 sheets of Dense Shield title backer, & some misc. peripherals.
5/17 Some good tools to have are: a chop saw, skill saw, table saw, oscillating saw, air compressor, impact drill, tape measure, level, caulking gun, grinder, & clamps. Took me about 12 hours & I did the work in my dirt driveway. Nothing fancy required. media.econoalchemist.com/w/7Uvm1zEmMYTfFW5uicZZBb
6/17 First, cut out all the pieces to their rough sizes like this.
7/17 Then put the frame together and add one side (A) piece and two end (D) pieces plus the bottom (B) piece. Each piece has 3 layers (OSB, asphalt board, Dense Shield) they are glued together with Liquid Nails with a few screws in place for good measure.
8/17 Add the wings on the sides and layer them the same way. I used foil tape to help keep the corners clean and to prevent splintering/deterioration.
9/17 Then the "T" center piece can be built. You can even add a vent register so that warm air can be circulated back to the cool intake side if it gets too cold or too humid.
10/17 Then finish the remaining open side and the top. Most of the pieces need to be cut down from the rough original sizes in order for a proper fit. The top was made to seat flush on the enclosure's upper edge, with the layers of asphalt board and Dense Shield recessed.
11/17 Anminer S19 & Whatsminer M30s miners can fit in here, one at a time. They need to be oriented on their side. Make sure to create a pressure barrier and fill the empty space around the miner. This separates the hot/cold sides. I just used some old towels for now.
12/17 In open air, an S19j Pro 110Th ASIC will run at about 78 dB with a roughly 5,000 RPM fan speed.

But in the enclosure, that noise is reduced by ~20dB!
13/17 Here is a video of the sound test:

media.econoalchemist.com/w/qVaURoxZEhSU1zTEJbXGT7
14/17 After an hour in the enclosure, hash rate was still at spec, temps were stable at ~67° C, and fan speeds were steady around 5,000 RPM. Going on 2 days now and all the vitals are still looking good.
15/17 I was in disbelief at how well the design worked. -20dB is perceived as 1/4 as loud. A tortuous air path is brilliant. It doesn't cost a lot to build one yourself if you have the time, skills, & tools.

Major props to @SGBarbour for bringing this forward for home miners👊
16/17 Check out some other awesome designs:
@BikesandBitcoin
bikesandbitcoin.substack.com/p/ep015-mining-bitcoin-in-an-apartment

@yooperHodl
yooperhodl.substack.com/p/yooper-crate

@Quierespowpow
www.reddit.com/r/BitcoinMining/comments/qqsbta/hobby_mining_journey_in_vietnam/
17/17 One last thing: Be mindful of fire risks and be thinking about what hazards you introduce into your home with this kind of project. Always consult a licensed electrician before plugging in mining equipment.
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