I bought a decent looking #Sharp #EL520 but when I put batteries in it, the display showed random segments and the audio output was a mess. About 45 years old, there could be a lot of reasons for this fault but as it turned out gold surface wasn't thick enough for the (pointy) contact. A bit of solder after cleaning the PCB did the job.
#vintagecalculator — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #vintagecalculator, aggregated by home.social.
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Today I found out that 1 divided by 9 and after multiplied by 9 (1/9*9) is a calculation that most pocket calculators can't give the correct answere to, it should be equal to 1 but on my pocket calculator is equal to 0.9999999. I suspect it's because they don't have enough digits precission to give me the correct answere and that's just me guessing why it is. Even if IDK the answere to why it's happening it's still interesting.
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More from my vintage Casio Personal M-1 Calculator reconditioning after a bunch of cleaning partly because of the alkaline battery leakage that leaked very badly, that luckily won't get all the way into the PCB, but there were some crystallized acid pieces inside the case all the way underneath the VFD (vacuum fluorescent) display I managed to get rid of the mess that the leakage caused.
#vintageelectronics #vintagecalculator #casio #casiocalculator #batteryleakage
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The Casio Personal M-1 calculator had some damaged traces on it's PCB that needed to be replaced with some wires, but before that I have scraped with an exacto knife the damaged parts of the traces and prepared a small amount to be able to solder on the wires into. It was definitely repaired before by someone, there was one trace that was replaced with some kynar wire.
#vintageelectronics #vintagecalculator #casio #casiocalculator #batteryleakage
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Finally I have found my vintage calculator that I have searched for years around the house that needed badly to be cleaned and repaired. I have found it in the attic the poor thing have been in ruff shape after it was exposed to extreme heat and cold up there. To make thing worst I forgot to take the two AA alkaline batteries off that I have put into them years before to test it out to see if it turns on and it did.
#vintageelectronics #vintagecalculator #casio #casiocalculator #batteryleakage
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Found a blown fuse inside the Rapidman 1212 calculator that had travelled across the Atlantic.
My new step-down voltage converter worked. The calculator didn't.
Or so I thought...
While I was doing diagnostics with my meter, I hadn't noticed that two of the digits had lit up!
#Rapidman #Rapidman1212 #Calculator #VintageCalculator #Vintage #Retro #Old #Tech #Technology #Repair #Nostalgia #GasDischargeDisplay #OrangeGlow #Fuse
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I took a chance on a nice-looking HP 19BII on eBay that was listed as untested. It was quite cheap and worst case it’d be a really cool display piece.
I got some N-cell batteries and very carefully installed them.
Nothing happened at first when I hit “ON”. Just as I resigned myself to it being a dud, I heard a beep and the display came to life!
There’s a lot to explore on here and it’s going to be a fantastic companion to my 17BII.
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You can do pretty cool stuff with a pinwheel calculator. Of course +, -, * and / 😂, but not only!
Here I computed 6 significant digits of square root of 2 💪
I even managed to achieve 10 significant digits with some tricks 👏👏
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Come and see the first pocket scientific calculator HP-35 🔢, aided in its development by Slovenian engineer France Rode, an excerpt from Prešeren's works on punched tape 📚, and a century-old IBM 010 card punch.
#computermuseum #computerhistory #slovenia #ljubljana #softwareheritage #hewlettpackard #nostalgia #nostalgie #nostalgi #retrocomputing #vintage #calculator #vintagecomputing #retro #ibm #hp #punchcard #punchcards #punchcardmachine #pocketcalculator #vintagecalculator
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Back from #camping in the wilds of #Alberta. Cold, rainy, windy. Not the best #CanadaDay long weekend but fun for what it was. Good people and some #boardgames
Came back to find this #VintageCalculator in the post box.
New project! Looks like it needs a new contact plate in the battery compartment, and a bit of a clean up.
Love the big, chonky, walkie-talkie, Hal 9000 vibe it gives off.
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Happy New Year from my 51 year-old calculator.
#happynewyear #vintagecalculator #vintagecomputing #casio #hogmanay
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Another bit of vintage technology working again.
This time it's a Casio R-1 calculator originally produced in 1971, last PAT tested in 1978.
And somehow the ribbon still has ink it 44 years later.
And look at that lovely circuit board.
#casio #calculator #vintage #vintagecomputing #vintagecalculator
