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| 04:14.16 | *** topic/#qi-hardware is Copyleft hardware - http://qi-hardware.com | hardware hackers join here to discuss Ben NanoNote, atben/atusb 802.15.4 wireless, anelok and other community driven hw projects | public logging at http://en.qi-hardware.com/irclogs and http://irclog.whitequark.org/qi-hardware |
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| 04:42.34 | whitequark | DocScrutinizer05: oh huh plasticizer leaking from rubber! |
| 04:49.13 | DocScrutinizer05 | I doubt this stuff seen any rubber ever |
| 04:49.41 | DocScrutinizer05 | feels like extremely softened PVC |
| 04:50.27 | DocScrutinizer05 | I wondered if it might be PE, but I doubt it |
| 04:55.53 | DocScrutinizer05 | the surface feels like Glycol, thinking of PEG, though that's most likely total nonsense |
| 04:56.58 | DocScrutinizer05 | I wonder if PEG works as a softener for PE |
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| 04:59.31 | DocScrutinizer05 | heck! |
| 05:00.12 | DocScrutinizer05 | the surface feels like Glycol, thinking of PEG, though that's most likely total nonsense. I wonder if PEG works as a softener for PE. and if PEG would do that sort of damage to Rigols and plastic boxes |
| 05:13.27 | whitequark | not PE |
| 05:13.44 | whitequark | PEG does not attack PE |
| 05:13.54 | whitequark | very few things do, mostly aromatics and even then |
| 05:14.10 | whitequark | PEG would not attack the ABS rigol case |
| 05:14.28 | whitequark | or the PP (I think?) plastic box |
| 05:15.43 | whitequark | it's almost certainly some kind of phtalate |
| 05:16.05 | whitequark | https://en.wikipedia.org/wiki/Diethyl_phthalate |
| 05:16.14 | whitequark | >It is a clear substance that is liquid at room temperature and is only slightly denser than liquid water. It has a faint, disagreeable odor and can be transferred from the plastics that contain it. |
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| 06:47.27 | promach | Could anyone explain the purpose (if possible, some maths equation) for J2 and R2 in https://easyeda.com/guest/Bob_Pease_s_High_Impedance_Active_Scope_Probe_simulations-gsmEyQ8qj ? |
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| 10:05.58 | promach | For https://i.redd.it/s1sboekd858z.png , why must Cp*Rp = Rin*Cin ? |
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| 11:05.38 | DocScrutinizer05 | maybe because you could restructure the math this way, though I'm to lazy to even start thinking about it |
| 11:05.56 | DocScrutinizer05 | looks like nonsense |
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