It was in april or may 2022 that I saw these crazy videos on twitter of the great soundproof Black Box from Upstream Data.
I wanted to build something similar on my own. All I had was this picture from their shop.
https://void.cat/d/Prv84aXYUQJHHxeeEcG31s.webp
So I went shopping, bought some high quality wooden plates and startet building. Here's my first sketch:
https://void.cat/d/A52G9zVaEYoorrkogvKgjL.webp
You gotta start somewhere, so I didn't hesitate and build an improvised workshop - in my carport...
https://void.cat/d/VX89YZwMN8iy2xDPS3XQ63.webp
Stay tuned for more Updates, pictures and videos in the following days...
-PV-Mining Box Thread☀️⛏️ - Part #2:
Building the box was a blast. I quickly finished the interior, looking like this:
Then I needed something to dampen the sound. Bought some sub-standard Bastotect-plates, which also provide fire restistance! (Btw, I donated the unneeded plates to the Plebrap crew 🎤🎙️🎶)
I cut the plates, which was a long and annoying process tbh, glued them inside the box and was finally done (for the first time...)
To find part #1 of this thread, have a look here:
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Thank you for the zaps, #[2] ! 💜🧡
-PV-Mining Box Thread☀️⛏️ - Part #3:
After finishing my box both of my S9 were placed inside and I had to do a lot of trial and error cycles with Braiins OS+ (the Miner's custom OS, used to achieve higher efficiency while lowering fan speed and fan noise) and Home Assistant (Open Source, Smart Home automation software).
As you can see and hear in the video clip, the sound reduction was countered by the higher fan speed, that had to be used to cool the miners when my box was closed.
I was super pissed 😅
So I had to get these miners' noise level down... To make it all worse, Autumn was coming and I wanted to move the mining box inside the living room to make use of it's heating potential.
So I got in touch with the fantastic german home mining community, which at that time started to form around #[1] 's fantastic podcast "Powering Bitcoin", and we found a solution.
First thing was to improve the airflow inside my box. I started by taking out two little plates, because I figured they were creating a bottleneck I'm my setup: 
Then I swapped out the ventilation grids:
It was a good start! But it wasn't enough. The biggest success in noise reduction was achieved by a hardware mod...
More about that in my next Update! So make sure to nostr daily!
🧡💜
Here's part #2 of this thread in case you missed it:
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