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Some light is reflected but most is absorbed.

Does anyone have actual transmittance numbers for the lasershades? I couldn't find any on their site.

I now have two separate drivers, both doing the same thing. Both use a 47uF capacitor, an LN4001 diode, one 1/2 watt 5.1 ohm resistor, and a one turn 20 ohm pot. One uses the larger package LM317, one the smaller package. When I used 5 AAA's to supply the power I see a smaller current output...

In my previous post I mention that adjusting the voltage input to the driver from 7.2 to 9 volts changes the max current output of my driver from ~140mA to ~220mA with the resistor and pot that I have on it. This seems to contradict your statement that only the 1.25 reference voltage and the...

So if you test your circuit using the 4 diodes in series, and see the expected 3V drop along with a current that varies from 50mA to ~250mA or whatever you want your peak to be, then your circuit is working and you shouldn't fry any diodes correct? Regardless of how many volts you are running...

I think I've bought the same pack before, there are not any 100 ohm pots in it. All of them are on the order of kilo-ohms if I remember right. You'll probably have to order one from digikey or mouser. If you want to measure them, just connect a multimeter and start twisting the screw on the...

I just finished turning a 12 volt supply for an OLD standalone cd drive into a variable power supply to run my DDL driver. Anyway, when I set the power supply to 9V I see a max current through my 4 test diodes as ~220mA, when I turn the power supply down to 7.2V I see a max current of ~140mA. I...

Soldered wires to the diode, then clipped wires to the proto-board with the circuit on it. Then clipped on the power. All the parts on the board were new and I shorted the legs of the cap just in case. Obviously wasn't as careful as I should have been. I really should have known better with the...

Well that explains the second one. The first one was connected to the LD first, then hooked up to the batteries. Apparently I managed to screw that one up in some other way. I'll have plenty of time to think about it while waiting for some more diodes to get here. I'm rather disappointed in...

For the first one yes. For the second one the circuit was connected and "running" I guess before I connected it to the LD, so there should not have been any voltage spikes correct? As the capacitor was connected to the circuit and not directly to the LD?

Well it seems I am fairly incompetent or I bought some bad diodes. I just tried out the second one, with a working DDL circuit starting at about 70mA up to ~220mA. I have what amounts to a nice red LED. I had on an anti-static wristband, used anti-static tweezers, and didn't solder anything for...

So I was measuring the current by placing a 1ohm resistor in series with the LD. Just now though I placed put the multimeter in between the power supply and the LM317 and I get the readings I dreaded. A max of about 220mA. I must have had something messed up with the previous measurements. Damn...

As I turn the pot my resistance goes from 5.7 to 23.0 ohms. I know there is something wrong, but I'm not sure what it is. I measured the voltage drop across a 1 ohm resistor in series with the LD to get the mA reading to the diode. I have 6 AAA batteries in series running the thing, and I read...

Yeah, I get a range from 14.5mA to 65mA when I turn the pot. I just replaced the LD with 4 rectifier diodes and I see exactly the same results. Measured the resistor again just to make sure and it is 5.4 ohms.

I bought a pair on ebay. The data sheet doesn't have a brand or anything. Says the threshold current is 65mA, with max CW at 150mW and max Pulsed 300mW. It is REALLY dim right now, I would expect it to be at 65mA, but I'm still a bit worried that I messed something up.

Rather than start a new thread I thought I would add to this one, as the title pretty much says it. I've put together the DDL driver, and everything seems to be correct. I have a 1 turn 20 ohm pot, and a 5.1 ohm resistor in series, and I'm using 6 alkaline AAA cells to power it right now. The...

Best I could do: http://www.laserpointerforums.com/forums/YaBB.pl?num=1203814390

I got the package the other day. Shipped quite securely. I haven't taken anything out of the ESD bags yet, as I am still waiting for parts from digikey. I'll let you know how it works out though.

I ordered a pair of the uvex glasses listed above. As soon as I get a laser all put together I plan on testing exactly how much light is transmitted by them to see if they are a viable alternative to the lasershades. I have access to a photo-diode so it won't be speculation or pictures but...

Looks like Texas Instruments is all over this too. http://earthlink.com.com/TI+demos+its+movie+projector+in+a+phone/2100-1041_3-6170619.html