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| 07:34.22 | qi-bot | [commit] Maarten ter Huurne: fbcon: Tweaks to non-ASCII characters in 6x10 font (jz-3.3) http://qi-hw.com/p/qi-kernel/2284faa |
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| 11:01.38 | qi-bot | [commit] Maarten ter Huurne: Use title case for Dingoo link titles. (master) http://qi-hw.com/p/gmenu2x/e5a9227 |
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| 15:19.34 | DocScrutinizer | idly wonders what might be the largest photosensor array you can get for low price -MP count irrelevant |
| 15:21.47 | DocScrutinizer | pondering a DIY Roentgen device, with electronic photo platter rather than chemical film. So any slaughtered VGA webcam module with a sensor area of less than 3mm diagonal is not suited for that purpose |
| 15:22.28 | DocScrutinizer | I'd need at very least 3/4" sensor |
| 15:22.58 | DocScrutinizer | better 2" |
| 15:23.59 | DocScrutinizer | or rather combine some smaller sensors in an array - I only wonder what to do for the frames |
| 15:24.44 | DocScrutinizer | AAAH, I could just overlap sensors, and subtract the "artifacts" from final combined readout |
| 15:25.11 | DocScrutinizer | :-D |
| 15:25.34 | DocScrutinizer | pretty good advantage when your sensors are "transparent" |
| 15:28.13 | DocScrutinizer | or do two shots in sequence, and offset the sensor array between them, so the borders in one snapshot are covered by good areas in second |
| 15:29.20 | DocScrutinizer | :-/ for a complete coverage, I'd need THREE shots |
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| 16:28.34 | whitequark | DocScrutinizer: won't xrays destroy the sensor? |
| 16:28.37 | whitequark | ion migration and stuff |
| 16:29.18 | DocScrutinizer | nah |
| 16:29.25 | DocScrutinizer | don't think so |
| 16:29.54 | DocScrutinizer | not this level of x-ray at least |
| 16:30.42 | DocScrutinizer | it's more like "will the sensor be sensible enough for this low x-ray exposure?" |
| 16:34.58 | whitequark | ahh. |
| 16:35.10 | whitequark | artifacts |
| 16:35.36 | whitequark | what's with artifacts? at least I believe that CMOS noise pattern is always same for each sensor and always differs between ones |
| 16:36.05 | DocScrutinizer | stuff like http://www.celnav.de/hv/hv5.htm and http://www.fingers-welt.de/gallerie/eigen/elektro/roentgen/roentgen.htm work with exposure times of like hours, on chemical film |
| 16:37.02 | whitequark | what do you want to measure? |
| 16:39.00 | DocScrutinizer | well, technical things. Like e.g. balls / solderpoints of BGA chips |
| 16:39.29 | whitequark | ah, then it's kinda simple |
| 16:39.47 | whitequark | I think you need to get an exposure of CMOS noise to get the pattern |
| 16:40.22 | whitequark | and then the same for the signal |
| 16:41.14 | DocScrutinizer | sure, on electronics you can just subtract the blackpicture, then divide by whitepicture |
| 16:42.32 | DocScrutinizer | would even eliminate the artifacts of overlapping sensors' frames |
| 16:45.05 | whitequark | huh, I know a guy who got an xray tube and exposured his hand through it |
| 16:45.30 | whitequark | got him into local news and to a radiation therapy unit |
| 16:46.03 | whitequark | ... which he was quite happy about because he got to know a few guys related to nuclear power station maintenance |
| 16:46.50 | whitequark | yeah, "know" not "knew". he also had his scope plug broken, so he just slided the contacts in the socket with his bare fingers |
| 16:46.55 | whitequark | I'm somewhat surprised he is still alive |
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| 17:20.29 | wpwrak | russian engineering wouldn't be half as entertaining without all the vodka ;-) |
| 17:35.19 | DocScrutinizer | hehe |
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| 17:52.57 | whitequark | funny thing is, he doesn't drink due to high ICP |
| 17:53.32 | wpwrak | Insane Clown Posse ? |
| 17:54.29 | wpwrak | ah, Intracranial Pressure. hmm. sounds fitting ;-) |
| 17:54.49 | whitequark | so you use duckduckgo too, hmm |
| 17:55.09 | wpwrak | naw, chromium |
| 17:55.23 | wpwrak | so google by default |
| 17:55.24 | whitequark | these two statements do not contradict one another |
| 17:55.25 | whitequark | ah |
| 18:25.46 | whitequark | huh, someone from Spain wrote me about a decentralized VPN I made several years ago while in high school |
| 18:26.04 | whitequark | no idea how did he manage to ever find it |
| 18:27.48 | rz2k | someone, please give me an explanation about why my new tablet works only when I press flex-pcb connector from lcd to mainboard. |
| 18:28.07 | rz2k | cant even imagine what the f. is the reason |
| 18:29.03 | rz2k | shielding, flex-pcb cracks, RF stuff? :/ |
| 18:30.20 | whitequark | obviously, poor soldering of flex-pcb |
| 18:30.23 | whitequark | or cracks in it |
| 18:31.02 | whitequark | I'm not sure what do you mean by "not works", but maybe it requests something via I2C from it and hangs without a reply |
| 18:31.05 | whitequark | or something like that |
| 18:31.14 | rz2k | nope |
| 18:31.23 | rz2k | it just freezes random |
| 18:31.32 | rz2k | on ipl/spl/android logo |
| 18:31.38 | rz2k | just random as hell. |
| 18:33.04 | rz2k | thanks to blue soviet duct tape, its fixed for now. |
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