How did you take "digital" photos in the 1980's and early 90's?
With an analog still video camera that stored images on a PAL format 2" video floppy disks, that's how!
Enter an age before SD cards, flash memory, JPG files, and USB!
A teardown of a 1991 vintage Canon Ion RC-260 Still Video Camera.
Forum: http://www.eevblog.com/forum/blog/eevblog-937-retro-canon-still-camera-teardown!/msg1056861/#msg1056861
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Dave shows how Tektronix digital oscilloscopes work fundamentally different in their Auto trigger mode from other brands.
And also some random ad-hock comparisons between the Tektronix MDO3000, Agilent MSOX3000, Rigol DS2000, and GW Instek GDS-2000A oscilloscopes.
Forum: http://www.eevblog.com/forum/blog/eevblog-617-tektronix-oscilloscope-anomaly/
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Mailbag time.
Dave tears down an original Apple Newton Messagepad 100.
Photos: http://www.flickr.com/photos/eevblog/sets/72157632652385309/
Forum Topic: http://www.eevblog.com/forum/blog/eevblog-418-mailbag-apple-newton-teardown/
Service Manual: http://www.unna.org/unna/development/documentation/OMPService/OMPRepairManual.pdf
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A magazine like Popular Science should be held to a higher standard than today's "Fake news" marketing re-hashing websites, which is why it's very disappointing to see them print an article on the thoroughly busted Indiegogo WaterSeer without any kind of basic fact checking or questioning of it's practicality.
P.S. The article author was contacted for comment but did not reply.
UPDATE: Popular Science ran another article not quite retracting their previous article, but acknowledging the issues.
Forum: http://www.eevblog.com/forum/blog/eevblab-31-popular-science-fail!-(water-seer)/
Fontus VIDEO: https://youtu.be/BhnoSREmWVY
Thunderf00t VIDEO: https://youtu.be/LVsqIjAeeXw
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The Dulmont Magnum "Kookaburra" from 1983 is the only laptop to have even been design and made in Australia, as well as being one of the world's first "clamshell" laptop designs.
Dave tears down this obscure retro classic based on the equally rare 80186.
Brochure: http://www.eevblog.com/files/Kookaburra.pdf
UPDATE:
John Blair has responded about this video:
Dave
Thanks so much for sending this along; I got a huge kick out of it.
I can answer some of the questions you raised in the video:
(*) You're right there was no removable R/W storage in 'laptop' mode; the 'disks' that MSDOS saw were implemented in RAM. You added removable storage by connecting the dual floppy drives via the parallel connector that you noted on the back.
(*) I wasn’t the original designer; I was brought in to run the software team (once Barry had the prototype hardware up), which I did throughout. Chris T was brought on later to run the hardware team; he and I worked together. Terry Crews was originally hired before me as engineering manager before me but it was immediately clear that he had no clue what he was doing in that role; they made him marketing manager, where he was responsible for those remarkable ads that you cited.
(*) The parallel port wasn’t really custom – was a standard configuration for that era.
(*) The 15 way ports were serial ports for printers et al, as you note later
(*) The RCA connector was a video port, as you note later.
(*) You're right that the ROMs contained MS-DOS – we actually had to modify MSDOS so that it ran from ROM, which was hard to do; lots of Gatesian self modifying code. I don’t believe anyone else got that to work, but it had a major benefit, in freeing up all the SRAM for stack and RAM disk
(*) 6:46 is classic, but in Barry's defence the model you have there is some weird prototype; hence all the kludges and the handwritten labels.
(*) The 80186 was NMOS, as you note. That was kind of the miracle here. Barry and I didn’t want CMOS because they were so so slow. But NMOS consumed a lot of power. The solution was to mod MSDOS so that the CPU and all of its support could be powered off between keystrokes; each time you hit a key, the 186 would come up from cold, and transparently reenter the OS. As you note. Gave us all of the performance of a PC and great battery life. We were much faster than 8088 desktops of the time.
(*) You Got It Working!!!! That’s so great! Congratulations.
(*) Drive B wasn’t ready because it was the plug in ROM
(*) The SRAM kept alive all the time – that’s where the RAM Disks were
(*) The tirade at the end isn’t really fair – this was a prototype between the Magnum and the Kookaburra . None of the points you make about removable store, video etc are correct – remember that when you plugged in a video monitor and disks, this was the fastest desktop PC of the time, that you could also take on the road.
Forum: http://www.eevblog.com/forum/blog/eevblog-949-vintage-australian-made-laptop-teardown/msg1080508/#msg1080508
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What's inside an analog 121.5MHz EPIRB/PLB Personal Locator Emergency Beacon, and how do they work?
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Dave checks out a Fluke/Philips PM2812 System DC Power supply he scored from ebay for 30 bucks.
Does it work?
Will the bunker hardware tin collection come through?
Forum:
http://www.eevblog.com/forum/blog/eevblog-755-fluke-pm2812-psu-ebay-score/
Service Manual: http://www.eevblog.com/files/philips_pm2811_pm2812_pm2813_sm.pdf
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