Gazoo
0
- Joined
- Jun 9, 2007
- Messages
- 3,206
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- 38
Yes but a 1 ohm resistor is much better. A 10ohm resistor will drop quite a bit of current. It will work, but the circuit will be that much less efficient.
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The voltage does matter, yes. It's the thing, that causes the current to flow.laser_freak said:I have my LD running happily at 450 mA's, but is that too much? Also, does the voltage matter? The input to the driver is around 5.7 volts (4 AA batteries) and the voltage to the LD is exactly 3 volts.
Well, this is the reason it doesn't heat up anymore. The current is way below 450mA, because you're not feeding the circuit enough voltage.The LD doesn't heat up that much anymore (I have no clue why),
I think your LD is still very much alive.. You just need to start using more batteries, and maybe set the current closer to 420mA and it should live for a very long time.I am very happy with it so far, but I have ordered another DVD burner because I don't think that it will last too much longer since I have put it through so much.
chido said:OOOOhhhhhhhhh!!!!!!!!!!! I can't believe I didn't notice he was only using 4 AAs, The 700mA caught my eye and I didn't really pay attention to the rest. :-[
I don't know if it's a word or not, but i just said, that not so long ago, i too had some stupid questions about the LM317 for example, simply because i was thinking the wrong way and complicated too much.. That's what i meant with "beginner questions"...chido said:Oh trust me I do not have that much experience with lasers. I only know how to build them and some extra stuff, but that's it. I haven't even built my own because I'm waiting to get some goggles first.
I've seen a lot of your posts, and trust me, you know a lot of things so don't try to act noobish. ;D (Is noobish even a word, and did I spell it right?) :-? ;D
smart puppy... obviously not one of those who still think they're immortal... and not an old fart who thinks he has nothing left to lose...chido said:But before I power anything, I need to get some red safety goggles first. Otherwise I'm not touching anything.
smart puppy... obviously not one of those who still think they're immortal... and not an old fart who thinks he has nothing left to lose...danq said:[quote author=chido link=1200633213/15#24 date=1203879270]But before I power anything, I need to get some red safety goggles first. Otherwise I'm not touching anything.
Well, it has to adjust the voltage, to keep current the same, when internal resistance changes from heat..laser_freak said:@ IgorT:
I am using the LM317T driver circuit. I just didn't know that it adjusted the voltage! I was getting a steady voltage reading from it.
Are you using them, or are you still waiting for them? These are perfect for the LM317 driver, because they give you 8.4V when full and 6V when empty. Over this entire voltage range, the 317 can keep the current constant..For batteries I was told to use two of these
I find this odd.. What current are you talking about?I DO have a 16x DVD burner. The open can diode is MUCH brighter when I run them at the same mA. It also seems to be very sturdy. I accidentally dropped the open can diode when I was extracting it and it was fine!
It's because they're not made to withstand such high currents and output power..I only have one question about it that you might be able to answer. I tried running my open can diode again at 700 mA's (this time with the better batteries) and everything was fine. But obviously you can't run the 16x stonetek diodes off that much current, but is that because it's not open can or is it because they're from a 16x burner and not a 20x burner?
Igor, the red is probably the second one. But you could just fire up each one, to about 75-100mA, and see which is which - maybe even before taking them out.IgorT said:Ok, my NEC 7191A finally arrived.. The shop said they sent it on friday, but the label says, they sent it yesturday...
I already dissected it, and found two cans.. One is in a weird square piece of metal, that has a thinner round tube with a lense on top.. The other is directly in the big chunk of metal..
Luckily both are cans, so i don't have to worry i'll get a flat chip red... But which one is which? I'm gona have to cut the metal away, it would seem..
danq said:Igor, the red is probably the second one. But you could just fire up each one, to about 75-100mA, and see which is which - maybe even before taking them out.
DanQ