Hello people , i got dvd rw laser and built laser driver , laser works and shines very bright but doesnt burn anything , its from lg dvd , power supply 12v 5 amo driver . Im using my own build bosy for laser , from dvd lens . Anyone can help?
thank you for your answer , it seems on picture that this laser point spot is big ) but it isnot ) i think maybe its problem with my build ? If ill take laser of that body must it burn something witjout lens ? Or please tell me what to do)In order to burn with this kind of diode you need to hit the object you want to burn with the exact focused spot instead of the big spread out blob you can see here. I'd take a look with some smoke to find out where the spot is and try with that.
But for god's sake - get some safety glasses! It's not worth losing your eyesight over trying to burn some things close up.
LM317's are extremely robust devices - but that "schematic" is a total joke - let's be real here it's not a proper schematic, it's useless as polarised components are not labeled (output cap and LM317). Look for a proper schematic of a current-regulator using the LM317 and compare to see if your circuit is even remotely functional.That day i leded my laser , killed ) today i got new lasersfrom dvd but until i connected them to my created driver i tested out voltage on driver and it shows 12 volt on out pins , it is connected on dc 12 v 5a . Seems like i killed lm317? How much must be viltage on out pins ? Thank you . I used lm317, 2x 10ohm resistor , 100ohm potentiometer , in4007 diode , 50v 10uf cap. What have i done wrong ? Here is from what photo i created driver .
You don't measure the current in the test load. Measure the voltage across the 1 Ohm resistor. V=IR, so by measuring the voltage across a known resistance you can calculate the current flowing in it. For a 1Ohm resistor this is easy as 1V=1A.I built test load with 10 1n4002 diodes but i cannot measure current , dont understand why, i think its my viltmeters foult .its very cheap one , when i set it in DCA and then on 10 A mode shows nothing and on 200m mode shows 0.02. Dont know ehat to di(
I built test load with 10 1n4002 diodes but i cannot measure current , dont understand why, i think its my viltmeters foult .its very cheap one , when i set it in DCA and then on 10 A mode shows nothing and on 200m mode shows 0.02. Dont know ehat to di(