Unknown diodes from DVD block unit

[M3tal]

Hey everyone,

I just harvested 2 diodes from a Panasonic Shikoku DVD block unit, model# LSXK0166 but I don't know which is red and which is infrared. I was able to completely remove one diode from the sled, "35TE9" is printed on the side and it has a triangle-shaped pin layout. The other one is still inside a little metal "barrel" that I have yet to extract it from. From the back the three pins are in a line instead of the triangle I'm used to seeing.

The manufacture date of the drive is August 2006 if that helps any. I do know that it's a DVD player, not a DVD burner. Are either one of these diodes even worth playing with?

I'm about to attempt my first laser build and I wanted to practice on these puppies so hopefully I won't ruin my 405nm when it comes in.

 

[HIMNL9]

Uhm, the one with the 3 pins in line seem a flat plastic case LD, and usually (but not 100% of the times), they are the IR diodes .....

You can try them with a very low current, or with a DMM in "diode test" position, and see which one emits a small amount of red light ..... at least the 5,6mm round one (red LDs are almost 99,9% of the times case negative)

 

[Danielxv]

DVD Player diodes works like a "normal" laser, do not burn anything.

Google "HOP-1200W" and see if your sleed look like this, if yes, the triangle-shaped pin is the red and the other that has the pins aligned and sink is the IR.

 

[M3tal]

Uhm, the one with the 3 pins in line seem a flat plastic case LD, and usually (but not 100% of the times), they are the IR diodes .....

You can try them with a very low current, or with a DMM in "diode test" position, and see which one emits a small amount of red light ..... at least the 5,6mm round one (red LDs are almost 99,9% of the times case negative)

What happens if I accidentally reverse the voltage?

DVD Player diodes works like a "normal" laser, do not burn anything.

Google "HOP-1200W" and see if your sleed look like this, if yes, the triangle-shaped pin is the red and the other that has the pins aligned and sink is the IR.

That is nearly identical to what I have. How much output do you think I can get out of the red one before it goes poof?

 

[HIMNL9]

Uhm, at those currents, and for a DVD burner diode, not too much ..... the current used for the test circuit in a DMM is matter of few milliamperes ..... the worse risk is that your DMM have too low voltage and current on the "diode/beeper" position, that it don't lit the LD in any position (half of my DMMs are so), and that you need to switch it on 200 ohm position, for get enough voltage for lit it.

Just keep the positive on the case (central pin), and you're ok, for red diodes ..... BTW, on 99% of the DMMs, the positive voltage, in diode and ohm positions, come out from the black / "common" lead, not from the red one.

Just work in a decently static-free environment (not going around on a moquette floor with gym shoes wearing paille and synthetic clothes, as example ), and you're ok ..... or use a static discharge wrist strap, or similar, if you want to be sure.

BTW, if you decide to connect a wire to the central (ground) pin of a main plug, as some site and videos suggest, and use it as antistatic wrist strap, don't forgot to place a resistor of at least 1 megaohm in serie with it (those so-called "electronic experts" that gives these suggestions on youtube, always forgot to mention that not all the power wiring plants are 100% "state-of-the-art" made, and that sometimes the "ground" wire is not at neutral level, especially if in the house there's some old apparate that leak current )

 

[Danielxv]

YouTube - electric man Family Guy

 

[HIMNL9]

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