2.5w Laser engraver controler problem

[wgfarias]

Hello guys,

I basically burned a 2.5w laser module controler board... i think it was the

MCP6002I, SN

microchip.
I found and bought on the internet two of then so i can change, but i really dont know if it was that chip - i need to wait them arrive , change and test; and if this is not the problem try another solution or even buy another laser... wait arraive; setup it... and all of that - and this worries me because i have a lot of work to do with the laser.

Searching the web, i notice there are some lasers without controler board... and i was thinking that the controller board was "just" to control PWM and TTL option.
Well, i´m not using any of then beause my CNC controller board cannot do it - i need only solid lines. I plugged the laser on the controller relay, and control it turnning ON and OFF this switch with M5 and M3 G-codes.

So, i was thinking: Can I skip the laser controller board and plug the diode direct to the 12v font?

I´d do this test right on, but i can damage it more if i cannot do like this way. Well, in my mind the diode is just a powerfull lamp, as the laser pointers but stronger, and all of then we can light on connectiong straight to the energy.
So, if anyone can help me i´d appreciatte a lot!

Thanks!

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[george4657]

DO NOT HOOK DIODE UP TO POWER DIRECT!!!
Laser diodes require maximum current controlled supplies.
That is what your controller was doing.
A diode running 5 volts at 1.5 amps for example will heat up as it runs and have a lower resistance so after a short time it will require only 4.5 volts at 1.5 amps.
If fed with 5 volts not current controlled it would start drawing more current and get even hotter lowering resistance even more and drawing even more current till it burned out.
From the description in your other posts you may have already blown your diode if 12 volts hit it.