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I ordered exactly one month ago and still didn´t get it :( So it looks like I will have to make a dispute. My recent order @DTR I made about 2 weeks ago already arrived though the distance is larger than from Israel to Germany, so it looks like the TEC´s either didn´t get shipped or got lost.

I´m having the DSO201 with a custom firmware. It´s quite ok for low frequencies, measurements at a car or to check a audio amplifier but for lasers it could be used as a graphical LPM with a modified firmware. The only benefit is, it´s quite handy and portable. So when you are often doing some...

I already answered somwhere in this topic that this TEC will be fine. It has 6x6 junctions exactly like the TEC I used for my first LPM where the output is more linear compared to the other TEC with 7x7 junctions I´m using in another LPM. So nothing to worry about the TEC. I also ordered two of...

Yes, that is what I finally did with this voltmeter, so the secound pot for trimming the "-out" isn´t in use though it´s still there on the pcb. However this voltmeter is doing quite a good job in zeroing, so I´m getting something between 0.000 and 0.001 when no laser is shining on the TEC...

For the first one you need a DC/DC converter to feed it separately and make it work correctly. Or two separate batteries. If the secound one is using the same type of chip, this will be also necessary but there I´m also not sure it has a 0.001 resolution. Most cheap LCD panels sold on ebay are...

You are welcome. :) About voltmeter. You need something with a 0.001 resolution like this one: 5 Digit 0 36'' Red LED DC 0 33 000V Digital Voltmeter Voltage Meter Car Panel | eBay

Yes, this will make it. :)

Is this that hard to understand? You see in your other pic which pin is +In for the unused OpAmp. It´s Pin no. 5. You only need a voltage divider build by two resistors. Both can be either 1K or 5K or even 10K. Doesn´t matter. It only matters the +In gets half the voltage you feed the IC with...

Where is the problem? The first OpAmp should be conneced like in the pic you quoted but the secound terminated like on the pic I attached.

Leaving the secound opAmp unconnected or grounding it will cause noise under both circumstates. There is a proper way to terminate unused OpAmps.

YOu both are right. It just depends on how you are looking at it. By using linear or buck drivers the charging level and the battery voltage will not matter that much but for boost drivers it will. A linear driver will drain for a long time the same amount of current till the minimum voltage for...

This TEC should be fine. It has 6x6 junctions as far I can see. I used a TEC with 6x6 junctions for my first DIY LPM and the TEC has a more linear ouptut compared to one with more junctions I used for another LPM.

Here is a video of such a laser and the pump laser is a 445nm.

I´ve seen something about this about one year ago in the TV news where they showed a prototype 3 color laser unit where the blue laser was spiltted and pumping a green and a red laser. They didn´t say anything about the wavelenght. Just that the blue was a laserdiode also used to pump the other...

Blaster already answered this by comparing the 200mW greenie with a 1.2W blue. A 1.5/1.9W wouldn´t be much brighter when you only look at the beam brightness. The 2.4W should have about as bright beam as the greenie but this all is very subjective because everyones eyes are not the same and more...

Yes there is at least for me but it also depends where you are going to use it. At a clear night shining to the sky both will appear really bright but shining them in a room the beam of the 200mW will appear stronger. However if you have the money I would also go for the suggested 2.4W+ blue...

Yes, Max changed this. At the beginning he was measuring with a IR blocking filter but changed this to measure with a pass through filter. This confused me also when I was writing my review because on his site it sill said it´s measured with a IR blocking filter but on my certificate it clearly...

It´s a IR pass through filter that is used. Not a IR blocking filter. That´s all.

Just a few thoughts from my side. Some people are colorblind. I´m not saying you are colorblind but there are many different forms of this and the point is their eyes are not that sensitive to green and red like for others. It´s mostly men who suffer this colorblindness, so your understanding of...

These drivers are a steal. Great quality for a really low price. Get some before they are sold out!