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Here's some pics of my first build. a simple 20mW 405nm, not the tiniest enclosure, but it works for me. Thank you to all who helped me out with my electronics questions etc. this forum has been a huge wealth of information. couldn't have done it without you LPF. I used the DDL...

Yep, I'm using the simulated load of 6, 1N4001 in series with a 1hom resistor. Across the resistor, the voltage drop was measuring as expected. ( according to rog8811's instructions) between 10mV and 98mV as the pot gets turned. anyhoo, Im going to rebuild the circuit as Sigurthr correctly...

hehe, wow, thanks for the great reception guys! this is a super cool community. I can't wait to show off my build. and check out more of what others are making. as an aside, My father in law and I have built a 10' x 5', 3 axis CNC machine, I've been making art and signage and a few other...

thank you so much Sigurthr! I'll go fix this up.

Just thinking about this. if the diode is a 405nm, so requiring ~4.5V, and I'm measuring the entire 10V that I'm putting into the driver across the test load, would that not mean that the LM317 is not taking its 3.7V ? could this 10V at the output burn the diode? or is it that the LM317 will...

Thanks for the help all, I hope to get some time tonight to make the modifications and retest the circuit.

Hello, heres a photoshop sketch of my understanding of the three diagrams. I built my driver same as the assembly diagram. my confusion is whether or not the other two are electrically the same. @Sigurthr: thanks for the tips about pots, I did not know that. I am very amateur with...

Hi, I just finished assembling the DDL Driver based on the schematic images on Rog8811's site. I am having readings that do not agree with the instructions. I am not getting the 1.25V reference voltage across the middle pin of the 317 to after the resistors. I am getting the full input...

Hi, New forum member here, I live in Vancouver and am setting off on a couple laser builds. I've been meaning to do this for a while now, but never had the time, I still don't, but I'm going for it anyhow. I have acquired the necessities to create a ~200mW 650nm, and a ~20mW 405nm from...