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We repair a classic HP 3478A 5-½ digit voltmeter, and admire its ultra complicated A to D converter.
HP Multislope II ADC patent: patents.google.com/patent/US4...
Ian Scott Johnston video on HP 3457 backlight mod: • No.042 - HP3457A Backl...
Blacklight display mod: www.eevblog.com/forum/testgea...
LCD protocol reverse engineering: www.eevblog.com/forum/project...
OLED mod: www.eevblog.com/forum/testgea...
Ken Shirriff's Nanoprocessor reverse engineering: www.righto.com/2020/09/hp-nano...
Ken Shirriff’s reverse engineering of the hybrid in Marco Reps’ HP 3458: x.com/kenshirriff/status/1448...
Jeff Peletz amazing HP instrument pictures: hparchive.com/wallpaper
Stuff that supports the channel:
- Amazon links for the tools I use in the lab: www.curiousmarc.com/amazon-links
- Channel merch on Fourthwall: curiousmarc-shop.fourthwall.com
- Legacy channel merch on Teespring (I don't have everything transferred to Fourthwall yet): teespring.com/stores/curiousm...
- Support us on Patreon: / curiousmarc
"Elevator Music" Credit: Crinoline Dreams by Kevin MacLeod
Our lovely sponsors
- PCBWay: fast turn PCBs, www.pcbway.com
- Electro-Rent: www.electrorent.com
- Keysight: test instruments: www.keysight.com
- Samtec: connectors: www.samtec.com
- R&D Microwaves: rdmicrowaves.com
Get more technical info on the companion site: www.curiousmarc.com
Contact info: kzbin.infoa...