Recent content by Tw15t3r

Yes, you just need to concentrate on the current. The voltage will tend to vary, because when the diode heats up, it could change. Just control the current and you will be fine, you do not need to worry about the voltage. Yes, you have read the graph right, and you will need 370mA to obtain...

Actual Optical Power is different from Electrical power. What you have calculated using P = VI is the electrical power input to the LED or the laser diode if you were to connect it. The laser diode is not 100% efficient, and so you will have to put in more than 300mW to get 300mW of optical...

I would recommend the classic 532nm DPSS laser modules which shouldn't be too difficult to get. Those are the brightest for the least power, as you might have noticed with laser pointers. The only trouble is that you need a little bit of extra space, as the module is usually about twice the...

What if you just keep the diode in a box with lots of silica gel first? That'd rid the moisture and prevent the frost. Then depending on how you might want to do it, it could be an option to conduct the experiment in that box too.

I made one for myself using a depleted pen ink, 4x 100k ohm resistors, aluminium foil, and tape (double sided). Very handy indeed, especially during winter. I had no idea these stuff were actually being sold though!

I ordered the 9mm module with X-drive @2.2A from DTR's site, the torch from DX (sku 191998), and machined the heatsink locally at one of the machine shops in my country. It runs off 2 Lithium Batteries. This is the host from DX that I ordered. It's a pretty bright light on its own, but I chose...

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please I found the datasheet for these diodes. 400mW is PULSED. Continuous wave is only 150mW.

Hmm, one thing that should be considered is how are you going to set the temperature tipping point? A thermistor (unless it's a temperature sensor, i.e. like TMP35 or LM35) would not have a calibration, and hence must be calibrated by measuring the temperature of the diode using a temperature...

Very nice "article" if it may be called as such. Are you including a section of DIY meters? Or would that be out of the scope?

I think the expression "quantum leap" is meant to reflect that it's on an entirely different level, i.e. the next quanta, which isn't progressive, hence quantum, and hence leap. I believe it doesn't refer to the orders of magnitudes at the level quantum mechanics governs. Whether this person...

Yes, send it to Blord please!

This is indeed good news! Looks like O-like definitely keeps their reputation. From what you said earlier, it sounds like you might have an extra diode! You might be able to assemble a second laser for yourself ;p

My 2 arrived without any damages during shipping! Thanks!

I see. Hmm, so the feel is that 350mA should be a typical current of these diodes to achieve something around 125mW? And any current below that would just mean that the diodes will last longer... Well, if nothing significant happens after 50hrs, would it then be good to conduct a 500mA test...

Splendid! :beer: I guess from there you'd be extrapolating the data to get an idea of how long it might last? What current will you be doing the long test on? The diodes seem very resilient, and you may not see anything over just 50 hrs if the current isn't high enough I think :thinking: