Old 05-21-2014, 01:39 PM #33
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Default Re: The death of a M140

Yay! The laser worked fine, My teacher pushed it up to 0,5A and burned a hole in My backpack....
Ive ordered 5 lm317t that should arrive tomorrow, thanks for the help everyone

-Victor


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Old 05-21-2014, 04:31 PM #34
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Default Re: The death of a M140

Glad to hear that the diode is ok!
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Old 05-21-2014, 11:51 PM #35
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Default Re: The death of a M140

Yes great news! Look closely at the LM317t, one the diagrams I referenced on the pin Vin/Vout were opposite. I guess different manufactures.
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Old 05-21-2014, 11:55 PM #36
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Default Re: The death of a M140

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Originally Posted by Down with Umbrella View Post
Yes great news! Look closely at the LM317t, one the diagrams I referenced on the pin Vin/Vout were opposite. I guess different manufactures.
Does that give these kind of symptoms?
In that case i feel kinda dumb....

,Victor
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Old 05-22-2014, 12:05 AM #37
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Default Re: The death of a M140

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Does that give these kind of symptoms?
In that case i feel kinda dumb....
Possibly It's hard to predict how IC's will react when being used for something they were not made for.
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Old 05-22-2014, 12:16 AM #38
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Default Re: The death of a M140

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Did you test the driver on a test load? This should always be done to make sure it's operating properly.

Nope.
Can i perform a test without 700 diodes which ive seen others use?


This is the LM317T that i have

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Old 05-22-2014, 12:18 AM #39
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Default Re: The death of a M140

Yeah, it's a constant current driver so go ahead and put an ammeter across the output. You don't need a test load if you're just going to see if it's putting out any current.
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Old 05-22-2014, 12:22 AM #40
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Default Re: The death of a M140

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Originally Posted by ARG View Post
Yeah, it's a constant current driver so go ahead and put an ammeter across the output. You don't need a test load if you're just going to see if it's putting out any current.
So ill. just short the output wires, atleast thats how My teacher did it.

,Victor
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Old 05-23-2014, 12:08 AM #41
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Default Re: The death of a M140

I switched to a new lm317t and it worked right away
Now its running @ 1,22A.
The burning capability stunned me

Thanks for the help everyone and thanks for the fast shipping and the awsome m140 DTR
-Victor
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