Search results

Those of you in possession of wide coverage receivers or transceivers could go to that frequency and decode the pirate sstv transmission there. The signal comes from some hijacked old geostationary (?)fleet of satellites and is FM modulated and quite weak, but even so, my ft60r can pull it from...

I had a bunch of 74' CMOS chips (nands, flipflops, counters, decoders,...)lying around and i figured i should put them to good use and build a frequency counter. It has a 1-Hz resolution and a 0.5ppm VCTCXO reference oscillator. While looking for suitable LED 7-segment displays in the junkbox...

Bought a couple of these Ledengin newly released single emitter UV LEDs LZ1-00UV00-00U0 and some mating thermal substrates. each emitter should put out in excess of 500mW of optical power at 700mA in a 4.4x4.4mm package. I will be using those to cure uv glues on random products that can't go...

I recently acquired this He-Ne red laser. I cant tell the model number or manufacture date, but the warning sticker says 1.0mW max. It is 220VAC powered self-contained laser with a beam shutter, TEM00 as far as i can tell. Inside there are a step-up transformer and a voltage multiplier plus a HV...

DCyb0Ih0LRY 60W (22mA) tube powered at 15mA. the burn mark 20m away from it is 25-30mm or so, but it could be smaller, it's kind of hard to tell with paper targets. I didn't have time for wood, maybe the next time

I ordered this ESD gun for work a month ago and it's finally here. For those of you who don't know, ESD guns produce special high voltage pulses with carefully taylored parameters like peak voltage, rise and fall times, pulse shape, etc., emulating real world ESD events in various industries...

*Test conditions* Anode current: 14mA, power: 40-45W Apple size: small to medium Apple taste: acceptable Burn-through time: 2 minutes or less Fumes odor: disagreeable

I have a CO2 laser power supply not unlike the large vairety of factory-made chinese co2 supplies intended for engraving machines. Those of you who own one know that tube current can be adjusted with a simple potentiometer hooked to 3 of the typically 6 control terminals. My question is if the...

So i got this 60W tube, a 1200mm long bong. It's too long to take a complete shot of it without gluing the camera on the ceiling, so i took 2 shots instead. It needs 22mA of current to produce 60W. Pic 1 shows the business end of the tube, a multimeter registering the tube current (slightly <5mA...

I scavenged this 25cm tube from some old /1990/ surplus medical equipment along with the corresponding HV driver board. I think that it was made in Bulgaria. The tube is running at 4.7mA now. the output power reaches a peak (5-6mW) at around 6.5mA after which it begins to roll off. The driver...

this is a broken glass rod. the edge the incident beam is coupled to is oval. the slightest change in the position and angle of incidence affects the number of waves in the rod. The opposite side where the fracture has occurred seems to reflect a small portion of the light back to the source...

these are two red LDs from LG burners. The one on the top comes from a 20x burner and the bottom one comes from its 22x successor. The dies look identical, both are 2.20mm long.

Yet another GGW-H20L bluray writer used to its best advantage...

here's the link: http://www.sharp.co.jp/corporate/news/071219-a-2.html basic specs: max cw output: 135mW pulsed output /pw 35ns, duty cycle 35%/: 400mW threshold current: 75mA op. current for Po=120mW: 200mA peak wavelength: 660nm divergence || to junction: 10 degrees divergnce perpendicular to...

Tempted by the higher dual layer recording speed (12x) compared to other 20x drives (10x), I got a Sony Nec Optiarc AD-7203S 20x drive only to find that both LDs are the notoriously useless flat frame-type. Below are some pictures. The red one looks exactly like SHARP's GH16P35A8C rated for...

a freshly harvested 20x LG open can

with a total run time of 4-5 hours, of which 80% at meager 150mA and the rest 19.99% at 200mA, today, 18th of March 2008, after experiencing the "safe" current of 300mA for 5 seconds and happily lasing at the "longevity guaranteed" current of 250mA for another 5 long seconds, died my first ever...

this is the front facet of a red 1-5mW chip-on-board LD into which i put catastrophic amount of current (on purpose ;) ). naturally, it doesnt lase anymore. the junction is electrically intact, which suggest that it suffered COD. The colored archs werent there prior to the "accident". The...

I have 2 open-can red LDs, one from a 20x lite-on and one from a 20x LG H55N. Both have the same external appearance, but the LG one seems to have a much lower forward drop at a given current. For instance, it has 2.38V across at 180mA, whereas the lite-on one reaches 2.51 volts at only 150mA...

ld drv