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ok hopefully back in business, I got myself broken DVD devices for free from a pc shop, one seems to be a DVD rom and the other a LiteOn SHM-165P6S , seems to be like 16X writer does DVD roms also have a strong red laser in?

yea... :-( lol, I finally understand that current setting. I think the wire slipped of and then touched and then slipped of, while I was busy pointing the laser to something I say it on.. yea the thing is gone, if I hook it up, it just glows like a led, but If I hook up the IR diode and check...

I killed my diode, I moved the diode and then the white wire "ground" slipped of the contact probe now I have another LED

hehe yea, thx man..I just want to ask you some more questions, I want to make a laser show and use this laser just for shining very hard up in the air on the 31 des and put on some mirrors that is spinning and make it blank with my 555 timer circuit is it safe? and how can I get more current...

ok my laser are working, I have some crazy IR laser and some red laser, awesome, any final notes for me? it's running max at 120 mA, can I go higher? both lasers work

ok the load is on and i am measuring the voltage, its around 3v + - , it goes higher if i turn the pot, everything still cool? What is the max voltage a laser can handle in that state? i can only get 220mA out of that circuit with a 5 ohms resistor in the regulator circuit

I'm done the 4 diode test load, I hooken it up to the output and put my meter in series with the load, and I got, 220mA on the meter

my potentiometer is open full blown, it.s only 5 ohms now? and im getting 230mA, do you think I'll get some other reading if I put on those diodes for the load?

after changing that resistor to 5 Ohms instead of 10 Ohms, I get a 230mA from my meter, is something wrong here, or is connecting the output to the amp meter direct just plain stupid and giving false info?

here is my regulator [/url][/IMG] the current meter is directly connected to the regulated output, kinda shot circuiting into the meter, and the max i get out of it is 120mA, Do I need to change that 10 Ohms resistor to 5 Ohms? on the circuit

isn't there like a fixed resistor value instead of a variable resistor for a 20X LG laser? because If i turn it to much up, then my LD will probably die

Here is a picture of the diode

hehe yea, I get your point, I have previously opened 5 roms before, I know how a LD look like, they are all cans, and have learned on the hard way that cd roms use IR diodes and not laser diodes :-( no wonder I dint see any red glow... hahahaha

the laser I want to drive is a is in a "20X LG DVD writer" everything is still intact..I haven't opened is yet, because i don't want to blow it, I first want to make a driver for it. I'm currently busy with this guide: I'm now building that LM317 current regulator circuit It can be done - Laser...

to heavy theory for me..but interesting...so I must never go higher then 120mA on any laser?, even on a 20X LG DVD laser?

yes, that cap that charges up have turned me off on LM317 based current regulator, my voltage regulator also have a cap, and that doesn't charge up like that..so I got confused and have decided you ask the experts yea, I kinda not understand that semi-conductor explanation, very difficult for...

hehe yip, its blanking, my bad...yea a 1W pulse on someone's eye, would be very bad

Hi to all I am very good in electronics, but not a expert on working with PIC’s I am new to this laser thingy, but I want to build a laser. I have built my variable voltage and amperage power. Voltage regular is with some LM317T, and the current regulator is with a MJ2955 transistor with a pot...

lol, I have bought a 30mw laser and made my own insane DMX patterns with it, and it kicks, people are tripping out on it. like charliebruce said, "beam scans at a sufficient speed" my does, but my laser is pulsed, some times, to get a spitted beam affect..like for example, 3 independent lines...