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I tried some days ago with a 1.5v battery and the valure was not right, I'll try again tomorrow just to be sure.

I don't know, I replaced the battery when I started this topic, the brand is Nimex. Actually I didn't buy it, an electrician left it here, I found it after a while and is only problem seemed to be the discarged battery.

no, it oscillates around 0.76V

so my mm is broken, fuck yeah!

should the multimeter show a "0" value when anode and cathode aren't touching anything? Because it says 0.92V and I'nt measuring anything roght now.

Ok thanks, I'll try, first I have to desolder the contacts on the diode

so if I put, let's say, 300, would it be just about batteries discharging out faster or are there risks of damaging the diode?

oh, ok, so if I want 200mA I have to turn the screw on the pad till the correct value shows off, got it. But is 200mA the value that grants maximum power to the laser? Can I choose other ones?

yep I do

I mean the red circuit board

all connection and measurements done, I just need to set the pad and wire the diode. Just how should I set the pad?

so what do I have to do now?

I don't know, I mean, I'm supposed to use AA batteries? Maybe would be nice to install a plug for the use of ac. I would like to obtain maximum power from the diode of course.

ok, done with the linking, about the measurement, where should I do it? the picture says on both side of the resistor, should I do it on the resistor or on the diode on its right? Maybe it's the same, I don't know. I tried with the 200m scale and the value oscillate between 107 and 109 mV, I...

ok, thanks, so the first post was wrong, nice to know before doing any damage :)

just to be sure, I've never posted a pic of the other side of the board, lot of time has passed and I don't want to ruin my limited resources. Doesn't sound strange to me.

It seems to me that those two posts contradict themself about the diode's connections, or maybe I cannot understand what you're trying to explane.

hello everyone I'm back! I've bought a new soldering iron (that turned out not so much better than the older one) and I came back to the project. I've done the testing circuit, soldering the resistors together but without solder on the circuit nor the battery, just electrical tape and coiled...

Thank you for the explanation but I don't think I have understood well enough, could you refer to the connection points by the numbers I gave to them please?

This solderer is so bad, it doesn't even melt tin with his tip..