11/29/2023 0 Comments Pn2222 transistor threshold![]() The Sony Watchman has a very weird “flat” CRTįired up my Sony Watchman today, and I actually found an analog TV broadcast It’s tube time! well, time to sort and test some vacuum tubes. Oh look, it’s a vacuum tube module from a 1950’s IBM computer! In 1959, GE tried to convince the world that vacuum tubes were better than transistors. One of the world’s first electronic calculators, the Friden EC-130. One of my Nixie clocks that I built almost 13 years ago. ![]() The bad tantalum cap in my frequency counter that started the cross section project One of the first digital voltmeters, the Fairchild 7100. Tube StuffĪ look at my private stash of Nixie tubes! Own an IBM PS/2 model 50, 50Z, or 70 with a broken proprietary floppy drive? Here’s a way you can make your own replacement out of some 3D printed parts and a standard PC floppy drive! MOnSter 6502 I made a controller for my Vectrex clone today! That DSP needs to get dumped!Ĭlones of my Snark Barker SB 1.0 clone are apparently now available in Hong Kong.Ī CDP1802 breadboard computer that starts simple and gets complicated Wanted: your *broken* old Sound Blaster 1.0, 1.5, or 2.0 cards. Open-source clone of the IBM extender and receiver cards for the IBM 5161 expansion chassis! The Intersil IM6100 is a PDP-8 on a CMOS chip! What should I do with it?Īnnouncing the SCOPETREX - the vector gaming console for your oscilloscope or XY monitor! Unusual Okidata gm3315b 5 1/4″ floppy drive. Metheus Ultra Graphics Accelerator 1104 has only two video modes: 1024×768 and emulated CGA at 960×600! The official IBM game control adapter has several unusual features.Įarly MDA graphics cards could actually do color!įound something strange on an 8″ floppy disk. Iomega’s Bernoulli box of 1982 was *not* the first floppy disk to use the Bernoulli principle. It was one of the first hardware accelerated cards available for the IBM PC! Number Nine Revolution 512×8 graphics card from 1984. Presenting a Targa video card from the mid 1980s Replacement plastic fasteners for IBM PS/2 systemsĮxperiments with 90MB Iomega Bernoulli cartridges Installing OS/2 2.1 on the PS/2 model 50Z IBM 7496 executive workstation video review Swapping out 200-pin Amiga CPU connectorsĪmiga ROM adapters for 27C4096 EPROMs to 27C400-style ROM pinoutsĪmiga Brataccas with unusual copy protected disk Resurrection of an Amiga 2000 motherboard. Amigaģ5 years ago today, the Amiga 1000 was born! There’s nothing quite like the ear piercing screech of a dot matrix printer generating a line full of ‘#’ symbols.Ĭursed 3mm audio plug. Say hello to the Intel SDK-86, the first computer to use the 8086 microprocessor! The Xerox Notetaker from 1978, the first computer to ever be used by a passenger on a commercial flight. UNIX computer that uses audio cassettes for storage. Rockwell AIM-65 computer with the MOnSter 6502! Two identical-looking Commodore mouses aren’t compatible. Today i dug up my first mobile computing device. Just wrote my first blink-an-LED program for this microcontroller, which is quite special… Slowly-rotating, dramatically lit Yamaha YM3812 OPL2 synthesizer chip MOS 6581 sound chip - aka the Commodore SID chip - slowly rotating and dramatically lit Northern Telecom NT6K00AN DisplayPhone from 1982 Slowly rotating and dramatically lit cutaway view of a 12AX7 Since it’s hard to search Twitter, I’ve put together a compilation of some of my best Twitter threads.ĭipped tantalum capacitor (my first cross section) ![]() Now go apply these ideas to the other two datasheets I included above and see how all this holds up.Tube Time Best Of JanuUncategorized No Comments The low-side switching of a load requiring a higher voltage (than \$V_\$.
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