Here you’ll find a collection of things that I do, make, say and think. A collection of projects I publshare on other sites online. Including; custom built and designed guitar or Hi-Fi amplifiers and effects, custom PC servers, and rescued, upcycled hardware. Simply a central place to collect what I’m doing with some of my a creative rest at any given time.
If you are in search for my professional information go to >JohannesJohansson.com<
For multiple ways to contact me this >linktree< makes it easy.
Categories
- DIY (23)
- DIY Audio (12)
- DIY Computation (7)
- DIY Misc (5)
Random Posts
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Dumble Overdrive Special: 3 Mods
Doing a copy of an amp can be a good learning experience, modifying it to suit your needs and taste, however, can be the really […]
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Pedal Progression: 1 Range Master
In this series I revisit and re-build some of my favorite guitar pedals. Here a treble booster is given some of the best vintage parts […]
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Cat tree
Say you want a cat tree on your balcony, buying one covered in fluff, like most are, is clearly a bad idea. Tossing something together […]
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Dumble Overdrive Special: 2 Headshell
Head, strange word for this but is what it’s called, a head being the amplifier, presumably sitting on the ‘body’ represented by the stacks of […]
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Guitar rebuild: 1 onboard preamps & hardware
From 70’s hard rock, to a credible metal guitar this one started its life 1982 in Japan, built in the great Matsumoku shop. Known for […]
Homelab: 2 Tiny 24 Core virtualization Computation with hacked hardware
For some time a good way to get cheap and powerful computers, outside of cutting edge gaming or single-core heft, have been to get used server CPU’s. There is even a interesting hardware hacking community around this practice coming out of China, where chipsets are removed from old server computers and attached to brand new custom motherboards allowing the most insane little unintended uses for server processors. You see, a lot of corporate computation often upgrade masses of computers at a time letting go of the leftovers for quite quite silly cheap money, for instance what I use here cost when new $2.949 (and there is two of them so double this price), now 8years later, you can buy them for $80 or less each… This is a crazy world.
Well, after letting that sink in a bit, it is possible to run a machine such as this, with 24cores 48threads, at 2.5Ghz base 3.5Ghz boost using a hardware hacked motherboard, in a case not much larger than your regular shoe-box. Simplified, that’s about the power of 6 individual laptops of today 2021, perfect for virtual servers and machine-learning, any computation that can be parallelized and does not work on GPU’s. As far as the case go, it had ventilation with far to few openings so required some cutting and installing fan grilles, as well as reorienting flow and adding a fan to the bottom, making a 20C change.
This incredible thing here is in a sub Micro-ATX formfactor, containing the same sockets that usually require a massive server motherboard, hacked together from new and scrounged parts. Sometimes the most fun engineering are not found in cutting edge things.
Homelab: 4 Family & apartment friendly server cabinet
Homelab: 3 Turning laptops into mini-servers
Homelab: 1 25 Year old computer as a firewall: 60Mbps throughput