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Sven Petersen

@svenpetersen1965.bsky.social
328 followers 187 following 1.1K posts

Into electronics, engineering, retro computing, open source hardware, photography, etc. etc. pp. tech.guitarsite.de

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Sven Petersen @svenpetersen1965.bsky.social · 16h
Now, I have printed all 1U #keycaps of the #C64 #keyboard with #dyeSublimation. After I started holding them with pliers, I have applied more pressure and did not screw up any.
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Sven Petersen @svenpetersen1965.bsky.social · 30/09/2026
My #dye #sublimation procedure. I am still not perfectly happy. All #keycaps have a good contrast, but some are partially not very sharp.
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Sven Petersen @svenpetersen1965.bsky.social · 30/09/2026
@morefunmakingit.bsky.social Hi Lee, this is my new hot plate and the adjustable platform, that I use for #SMD #soldering. The platform is nice but I have successfully done it without for at least two years. #hotPlate
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Sven Petersen @svenpetersen1965.bsky.social · 29/09/2026
I have tidied up the lab to free some space for taking keycap photos.
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Sven Petersen @svenpetersen1965.bsky.social · 27/09/2026
C64 keycap tray This is actually a by-product of my C64 keyboard project. The stl etc. files can be found in my github repositories: github.com/svenpetersen...
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Sven Petersen @svenpetersen1965.bsky.social · 26/09/2026
The UV printing tray can also hold the original keycaps. Could be handy for a keycap job. You see, that the keycaps are complete and you don‘t lose the order.
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Sven Petersen @svenpetersen1965.bsky.social · 25/09/2026
I have laser engraved a black keycap a bit deeper, painted the legends with model paint, let it dry for a week and brushed the excess off with the Dremel and a 300 grid tool. The final touch was wiping the surface with isopropanol and a nano sponge.
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Sven Petersen @svenpetersen1965.bsky.social · 25/09/2026
Yesterday, I have tested a new medium sized #hotPlate (for #SMD #soldering). The control response is quite good. The set temperature is reached reliably and without any overshoot. After placing a medium-sized heat sink on it and later removing it, the resulting temperature drop was acceptable.
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Sven Petersen @svenpetersen1965.bsky.social · 21/09/2026
A Hieronymus Bosch inspired keyboard might be fun, but I have other things to do. This is an ice-skating bird demon #keycap, I have made tonight. #HieronymusBosch
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Sven Petersen @svenpetersen1965.bsky.social · 19/09/2026
I know, that it is childish. Alternative Commodore key keycaps. I had to fill the space on the dye sublimation paper and also enjoy to play with Inkscape. With the navy guy, chatGPT assisted. Of course, I did all that to learn about #dyeSublimation 😉 #C64 #keyboard #keycap
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Sven Petersen @svenpetersen1965.bsky.social · 18/09/2026
I an still trying to find a good way for a reproducible was to dye sub the #C64 #keycaps. The silicone was not great, actually. The 2mm piece is soft (shore 5A), but the pressure in the center of the concave top was not high enough. Compressed aluminum foil was best, yet.
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Sven Petersen @svenpetersen1965.bsky.social · 17/09/2026
I have just made my first multi color keycap with dye sublimation. I still have to work out better process parameters. Anyway, it was not a total fail. #C64 #keyboard #keycap #dyeSublimation
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Sven Petersen @svenpetersen1965.bsky.social · 15/09/2026
I feel guilty for abusing AI. I rarely make cartoons or any images…
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Sven Petersen @svenpetersen1965.bsky.social · 15/09/2026
I could have put the keyboard and the ESD mat on the ground. Instead I used a ladder. Because it was funny. Or the lazy solution. Yesterday, the UV printed keyboard arrived. So I could finish the „UV printed keycaps“ chapter of my #C64 #keyboard documentation.
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Sven Petersen @svenpetersen1965.bsky.social · 11/09/2026
The photo was required for my #C64 #keyboard project. I enjoyed taking it, so I have spent a bit more time, than absolutely required. #photography #Commodore
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Sven Petersen @svenpetersen1965.bsky.social · 10/09/2026
Is wieder Bundeswååntach. Mann in de Tünn… mein Handy hat sich fast erbrochen.
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Sven Petersen @svenpetersen1965.bsky.social · 09/09/2026
#Photography time 🙂 This is comparing methods of #keycap making. Laser marking, black and white UV decals. #C64 #keyboard #documentation #laserEngraving #laserMarking #UVdecals
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Sven Petersen @svenpetersen1965.bsky.social · 08/09/2026
It is 3am, you want to tell somebody about good heatsinks for the job and there is no suitable picture on your iPad. You heed to go downstairs to take some… then passion kicks in and you feel, you need to fire up Lightroom and GIMP. I discovered the focus blur filter of GIMP. Cool!
DIP40, 28 and 24 heatsinks, arranged for taking pictures.
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Sven Petersen @svenpetersen1965.bsky.social · 08/09/2026
Vigilavi, vidi, risi. I can‘t change it, I have no influence, so I leaned back and watched the daily spectacle.
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Sven Petersen @svenpetersen1965.bsky.social · 06/09/2026
Because I could not resist: I took decent pictures of my colored keycaps using a camera and a light cone. For comparison: the iPad taken pictures from two days ago (photo tag on the right).
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Sven Petersen @svenpetersen1965.bsky.social · 05/09/2026
I was tempted to retake this with a DSLR, 10 minutes before midnight. Then laziness took over… iPad is good enough for project documentation… or not? #C64 #keyboard #keycaps #fiberLaser
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Sven Petersen @svenpetersen1965.bsky.social · 04/09/2026
8 years ago, I have built this :-) Actually for my son, who was taking piano lessons. #musicSliderule
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Sven Petersen @svenpetersen1965.bsky.social · 03/09/2026
Finally, I have set up DSLR and lights. Not three, but two. And a light cone. I think, the #C64 #keycaps deserve/require some decent pictures for the documentation.
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Sven Petersen @svenpetersen1965.bsky.social · 03/09/2026
I have destroyed a #UV #filter. The first in 17 years. It is intended to be sacrificed instead of the #lens. So, I am not particularly sad. #UVfilter #lensProtection
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Sven Petersen @svenpetersen1965.bsky.social · 03/09/2026
The documentation for my #C64 #keyboard is growing slowly. The hardware documentation is almost finished, the software documentation is finished. The „How to DIY keycaps“ still needs to be written. github.com/svenpetersen...
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Sven Petersen @svenpetersen1965.bsky.social · 03/09/2026
Big eggs. A calculator for comparison of size. Both eggs had two yolks each.
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Sven Petersen @svenpetersen1965.bsky.social · 29/08/2026
Germans eat more bananas than monkeys. Last year, Germans ate approximately 436 million bananas, but only four monkeys.
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Sven Petersen @svenpetersen1965.bsky.social · 18/08/2026
I have found a cheap finger flush cutter on AliExpress.
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Sven Petersen @svenpetersen1965.bsky.social · 14/08/2026
Today, somebody pissed me off, so I went on an excursion to Kloster Reuthberg. They have a beergarten and a view there.
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Sven Petersen @svenpetersen1965.bsky.social · 12/08/2026
I had a lot of fun with the eclipse. Actually, because I talked to some nice people. Shooting the #solarEclipse with my #Dwarf3 was the other 20% of the #fun
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Sven Petersen @svenpetersen1965.bsky.social · 11/08/2026
I was testing, if the uv decals would wear off. Wrote a BASIC program to count and pressed the prepared button 10,000 times. Well… the uv decal was not harmed, my arm still hurts, though. #Commodore #C64 #keyboard
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Sven Petersen @svenpetersen1965.bsky.social · 10/08/2026
Me and my C64 keyboard again 🤣🤣🤣 Today, I have received UV decals with the keycap legends from Badgeman. I have already appliedthem to one set of keycaps. It was much less difficult than I had assumed.
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Sven Petersen @svenpetersen1965.bsky.social · 09/08/2026
Both types of use… as #C64 #keyboard and USB keyboard. I needed this photo for my documentation.
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Sven Petersen @svenpetersen1965.bsky.social · 06/08/2026
My C64 USB keyboard with original keycaps. I used the keycap adapters, which came with the Retro Fuzion Mechboard. They replaced it. I used the replacement and kept these one. Some flawless new keycap nipsies are on their way. Oh, and some authentic desk clutter 🤣
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Sven Petersen @svenpetersen1965.bsky.social · 05/08/2026
I took some photos of the #C64 #keyboard with the iPad. Well, there is always something, that I dislike. A camera on a tripod is much better. I have tried to adjust the position of the case parts with a ruler. Oh well, I hate kneeling on the floor, which is clearly visible in that picture 🤣🤣🤣
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Sven Petersen @svenpetersen1965.bsky.social · 04/08/2026
It is great to have an inspection flap like this. A broken trace on the PCB fixed. Unfortunately, I had another problem, which let me take off half of the keycap and switches.
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Sven Petersen @svenpetersen1965.bsky.social · 02/08/2026
One step back, actually two. The screw post snapped off of the left plate, after I printed out the latest design. So, I have increased the diameter and added some stabilization wings. So, left plate, third print. And since the right plate got winged posts, too, I will reprint that, as well.
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Sven Petersen @svenpetersen1965.bsky.social · 02/08/2026
I have made an enclosure for my #C64 #keyboard project, in case it is used as a #USB keyboard for #VICE. It is better than the „open frame“ design for mounting it into a C64. I am still optimizing, so I guess, I will print every part twice.
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Sven Petersen @svenpetersen1965.bsky.social · 02/08/2026
At least, I can read, that my USB power tester is from #Fnirsi 🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️
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Sven Petersen @svenpetersen1965.bsky.social · 30/07/2026
AI used my photo on Facebook, without properly referring. I am a victim 🤣🤣🤣🤣🤣🤣 #MichaelBrecker
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Sven Petersen @svenpetersen1965.bsky.social · 28/07/2026
So, today, I have made some „special keycaps“ for using my keyboard project on the Ultimate 64. This modus works like intended. Actually, it was quite a bit of work for just three keycaps. I had to make changes in 5 keyboard layouts.
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Sven Petersen @svenpetersen1965.bsky.social · 28/07/2026
It works precisely 😉
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Sven Petersen @svenpetersen1965.bsky.social · 27/07/2026
I used the machine that goes „ping“, just in case my administrator comes. She likes it. It is the most expensive machine in the lab. #C64 #keyboard #testing
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Sven Petersen @svenpetersen1965.bsky.social · 25/07/2026
Somebody on Forum64.de gave me a 1351 #mouse for the #C64. It works! I am impressed and grateful.
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Sven Petersen @svenpetersen1965.bsky.social · 24/07/2026
My problem: Too many fυcking #books! This is only one of my several book shelves. The red and white books are from Data Becker. I only had two in the 1980s. They were my retro computing bible beside the Compute! Magazines, that I had.
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Sven Petersen @svenpetersen1965.bsky.social · 21/07/2026
Due to my #C64 #keyboard project, I got interested in keycap printing. Right now, I laser etch the legends. I think, UV printing is probably the best way and there are a couple of UV printers on kickstarter, right now. I hope, competition will make them more affordable.
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Sven Petersen @svenpetersen1965.bsky.social · 19/07/2026
I have just published my Commodore PSU Tester on github: github.com/svenpetersen...
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Sven Petersen @svenpetersen1965.bsky.social · 13/07/2026
Do you know, what is wrong here?
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Sven Petersen @svenpetersen1965.bsky.social · 11/07/2026
Do they know?
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Sven Petersen @svenpetersen1965.bsky.social · 09/07/2026
Making key caps for my #C64 #keyboard project. It definitely takes its time. The laser etching takes about as long as I need for installing 9 keys on the keyboard and loading the other 3x3 jig. It is faster with a jig, than the 3 hours for 1 set without using one.
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