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So I have boosted up voltage and current but not much is happening, as you suggested, I guess this one is fired :cryyy: I did some more researching and found someone using the same drive that I am using RepRap: Builders: first tests building a powder-based stereolithography printer: part 1 it...

Same thing :undecided:

across resistor 0.23 Volts, ampere meter showing 0.28Amps ..difference probably cuz of crappy meter types I guess

I have tried the series of diodes trick and measuring the mV on the series 1ohm resistance (the mV=mA little trick) and it seems fine! I also have a voltmeter accross the diode and resistance, and another ampere meter before the 1ohm resistance to measure the current...all seems ok :undecided...

I've mentioned the link that has the reference circuit, but anyway, I have re-drew what I've done on eagle, here's the diagram I have sometimes put more 5 ohm resistance parallel to the existing one to allow for more current:

Hi all, thanks for your feedback, I have some things to say... Yes, I discharge my cap before connecting the diode :) I have got myself another DVD RW drive, but I don't want to extract the LD from it yet, I am thinking maybe there's a way to use the already built in circuit to ensure correct...

There's something I noticed about the DVD laser diode, it had three pins, but unlike the conventional pin configuration of the common LD (Gnd, LD, case/body) this one has: Gnd, CD & DVD... thought it's worth mentioning!

Seoul_lasers: Are you sure about this?? a laser diode can just be a LED? wouldn't over-current just ruin it totally so it won't work at all? I was just wondering if you had past experiences with this. So if I go and buy another diode or extract one from another DVD writer, is there a way to use...

Ghostchrome: Tried that, nope :), also if you check my first post, I was able to get much more light from it at some point, I just don't remember what is it that I did differently! Seoul_lasers: hmmm...it doesn't get hot actually! :undecided:

I don't have a lab supply, I have all the components (LM317 circuit) on a bread board, I was thinking the same that I might have ruined it, but then again why does it still work (I can still see the red light)?? here's a photo of it working with the unexplained low power: View image: 2012 02 29...

I don't have a lab supply, I have all the components (LM317 circuit) on a bread board, I was thinking the same that I might have ruined it, but then again why does it still work (I can still see the red light)??

Hi, thanks for getting back on this, I am pretty worried about connecting it directly to batteries (excess current could put an end to it! right?) I actually did the diode trick the first time before connecting the diode :)) I did it again now, the reading is around 240 milliVolt, but why is it...

Hi All, I was happy to know one can do some tests using the LD from a DVD burner, such a common thing :) I have researched before setting everything up, I have a little background in electronics so I am familiar with regulators, however, it is the first time for me to use the LM317. So I wired...