Here you’ll find a collection of things that I do, make, say, and think. It collects projects published across my sites, including custom-built guitar and hi-fi amplifiers and effects, custom PC servers, and rescued or upcycled hardware. Simply a central place to collect what I’m doing with some of my creative energy at any given time.
If you are looking for my professional information go to >JohannesJohansson.com<
- DIY
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- DIY! In audio electronics, guitars, computers and misc
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- Guitar Amplifiers & Hi-Fi
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- Workshop / Misc
- Homelab
- Amiga Next-Gen Build
- Pedal Progression
- Guitar Rebuild
- Dumble Overdrive Special
- TrainWreck Rockette
- High Gain SLO/Ubershall
- Custom DDC (Hi-Fi)
- Restomod Car
Categories
- DIY (30)
- DIY Audio (18)
- DIY Computation (8)
- DIY Misc (5)
Random Posts
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Homelab: 3 Turning laptops into mini-servers
An argument for turning old laptops into mini-servers instead of e-waste, with practical homelab examples.
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Amiga Next-Gen Build: 2 Motherboard repair & power supply
The second Amiga Next-Gen Build entry chases heat-related instability through motherboard repair and power-supply suspicion.
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Easy Naim Hi-Fi power amp upgrades
A straightforward set of component upgrades that can noticeably improve older Naim power amps and similar hi-fi amplifiers.
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Custom DDC: 1 Digital to Digital Converter; USB to I2S over HDMI; S/PDIF; AES
A DIY digital-to-digital converter build with USB input, improved clocks, and outputs including I2S over HDMI, S/PDIF, and AES.
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Saving Monitors: Leaky capacitors
A quick repair example showing how leaking capacitors can bring old monitors back to life for very little cost.
Restomod Car: 3 GTE Digital Dash start
Digital dash — yes, you saw right — there is a digital dash available (from an Opel GTE) for this ’90s car, and here I will heavily modify it to make it work, repair it, change it to custom colours, and merge it into the instrument panel of the car. First I need to boot it up: it was bought as unknown, presumed dead, and I would certainly like to include LED lighting instead of bulbs. Just getting 12V power into it without a plug required some soldering and hunting.
For it to work I also need a rare Sensor, the AK one shown below, lots of misinformation about that one, in reality there is a switch on my version of the dash where I can select the AK sensor so can always make it work with an, although equally rare alternative. as you can see in the image I did get it to work, without lighting. Fixing that is a first task.
To that end in a first step I need to build some new “bulbs” from modifying standard LED -pure white- bulbs packaged to retrofit into old cars, still need to cut these apart with a Dremel to fit them into the old holders for the bulbs in the instrumentation. First picture also show the new socket and plug I need to graft onto it, and the old diffuser that made those 80’s LED yellow numerals and indication, those needs to be ground down and replaced with colored gel-films to change it.
Then there is the matter of Fixing a plug, since the original is hard to track down, so unsoldering all pin’s of the socket, quite a bit of work, but I need to be able to lock this in. It also made sense to me to exchange those old electrolytic caps, since they do dry out over time, and having been made close to 40 years ago they may well drift in value or fail soon.
Last, for now I hook up the sensor and spin it to make sure it is working, now what’s left is clearing setting and making sure the little motor-run milage counter work. Then what i can do here is done, the second and last parts will have to cover moulding the dash into the existing Astra instrumentation surround with some glassfiber, bonding and paint, followed by actually fitting it into the car. Next time I’ll get some image reflecting the actual light, camera light-shifted a lot when using teh gels.
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