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EEVblog 1425 - Fluke Repair 2 Electric Boogaloo

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EEVblog:
Part 2 of the Fluke 23 multimeter repair by digging into the bunker meter archives from episode #84
Experimenting with alfoil



Part 1:
High energy Multimeter destruction:
LCD Technology tutorial:

Kleinstein:
Many LCDs have the polarization at a 45 deg angle. With a loose polarizer foil one can than easy change the contrast from black segments to white segments, just by flipping the foil upside down. Many cheap pocket calculators come with a loose polarizing foil.

rsjsouza:
EEVBlog #84 is one of my favourites!   :-DD

robert.rozee:
as i recall, light reflected off a metal surface is to some degree polarized. dave may have had slightly better success with a piece of white paper rather than metal foil, it would be interesting to see the result. certainly, the 'outlined' effect in the video is odd.

i've found that a good source of (rather large) scraps of polarized film is from the front of a broken LCD monitor or TV.


cheers,
rob   :-)

rsjsouza:

--- Quote from: robert.rozee on October 07, 2021, 10:58:42 am ---as i recall, light reflected off a metal surface is to some degree polarized. dave may have had slightly better success with a piece of white paper rather than metal foil, it would be interesting to see the result. certainly, the 'outlined' effect in the video is odd.

--- End quote ---
Since you mentioned, I now recall putting a piece of paper behind one of those table alarm clocks with see through LCDs. I recall that beige worked better than white, as it reduced the glare.

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