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Hi, I found these during a shed clearout. They've been partially dismantled but the mainboards, colour wheels and DLP boards seem intact. One is a Toshiba, the other is possibly a Panasonic. Anyone have a use? Seems a shame to just dump them but I can't see any way to repair them as the power...

Hi all. Thanks to some do gooders over here, my "homemade" bike lights are now illegal. Seems that to avoid a £30 fine, the lights now have to comply with BS3648 which means most LED lights are technically illegal :-( Any ideas? The only approach I can think of is to buy the cheapest £18...

Hi all. I am after some small junction type blue 445 or 405nm diodes for an optical disk recovery device. Does anyone have a source for these? The ones used in the PS3 slim optics look promising but my one has negligible output power due to it being a used part. It has to be a canned diode...

Hi all. Seems that back in the 1900s Tesla was indeed experimenting with lasers. More specifically, single shot ruby lasers powered by a capacitor discharge. It appears that they worked by igniting a carbon button in the proximity of a ruby rod, generating very short bursts of red laser light...

Hi all. Just found something interesting. I found a broken 100mW burner diode (violet 405nm) which measured nearly open. Having confirmed that it still drew a few uA I hooked up DMM on voltage range. Well whaddaya know, narrow band UV sensor 1.5mV outside in the winter sun around 11am from...

Hi all. Looking at Powerful laser diode from DVD-RW burned gave me an idea. I have been looking into recovering data from DVDRs that have failed due to old age, it seems that the dye is the root cause of this as over time it reflows around the damage so that the pits and lands become harder...

Hi all. OK this is pretty weird guys. I finally got around to repairing my expensive Bull Electrical "fisheye" 1cm2 IR sensor which has had the filter carefully removed. What happened was that the two bond wires were damaged and went open about a month after I'd done the surgery on the sensor...

Cryogenic Sonoluminescence Heh. I was chatting to someone about this the other day. Wonder if this would work with a >1W pulsed infrared laser? If so then it raises the interesting possibility of building a SL cell which works immediately without the annoyance of having to carefully ramp up...

Hi all. Does anyone have any ideas how to non destructively remove one of these from an aixiz? I put a single drop of glue on it having carefully focussed and aligned it, and evidently it got inside the module! (GRRR!) Next time use Epoxy.:scowl::scowl: Any ideas how to undo this mess, as its...

Hi all. I was reading up on some very interesting work on using lasers for plasma experiments, as it turns out that you could use two or more high power lasers to focus on the centre of a sonoluminescence cell in order to generate a bubble without the use of hazardous isotopes. Recall a few...

Hi all. This is an experimental PCB photoresist exposing setup I am building. Currently posted on 4HV as well, but thought you'd like to see the progress so far. The mechanism is from a discarded Apple Laserwriter printer, which has glass optics and a well made robust hexagonal mirror assembly...

Hi all. Looking at the threads and from my own experimentation, it occurs to me that one possible use for the 445nm diodes could be to make the world's brightest pocket torch. All that would be needed is a 445nm diode, driver, salvaged or new blue to green/red crystal from white LED and a...

Hi all. Upon reading the articles suggesting that broken 445's could be repaired, it occurs to me that I have some 35 gauge solder here. If anyone has one or more broken diodes which are open circuit, I would be interested in trying the bond wire repair technique on them. Thanks! -A