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Old 05-10-2008, 10:57 PM #1
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Default dim beam

i changed the case i had the driver in. and when i turn my laser on. it is now dim. i see that i am putting out 350ma and 3 v. i checked it with my meter is the diode blown. only used it for 5 mins and with the driver. 45 sec on 30sec off


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Old 05-11-2008, 12:08 AM #2
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Default Re: dim beam

What type of laser diode are you using?

You could have killed it by the heat of soldering.
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Old 05-11-2008, 01:17 AM #3
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Default Re: dim beam

seems to me you've killed it,
if you lower the voltage does it get dimmer?
it doesnt matter if you've only used it for 40 secs as even a fraction of a second could kill it



(hope you DIDNT!!)
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Old 05-11-2008, 01:25 AM #4
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Default Re: dim beam

Quote:
Originally Posted by laserhacker
i changed the case i had the driver in. and when i turn my laser on. it is now dim. i see that i am putting out 350ma and 3 v. i checked it with my meter is the diode blown. only used it for 5 mins and with the driver. 45 sec on 30sec off
Did you heatsink the module the diode was in? You say you used it for 5 min, was that in the case you had it before or in the case you just placed everything in? If it was in the other case, then did you disconnect the diode from the driver? Did you short out the capacitor before connecting it back????
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Old 05-11-2008, 02:35 AM #5
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Default Re: dim beam

all i did was take the driver out of the old case i has it in and place it in a new one. i did not change anything only the driver case. i did not change the module . i left it in the heat sink.
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Old 05-11-2008, 02:38 AM #6
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Default Re: dim beam

Yes, but did you disconnect the diode from the driver?
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Old 05-12-2008, 01:53 PM #7
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Default Re: dim beam

well i check the driver again and i know it is not that.i hooked up the other diode from the dvd burner to check it. so i guess i blow the diode. and well i seen it work for a few min. i am not going to order a new diode. let try again.
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Old 05-13-2008, 04:17 PM #8
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Default Re: dim beam

i am going to be using the same diode. can i use the blown one for a load test. will that be good to set up a max MA. the the lm317 chip is ok with 6 aa batterys right?
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Old 05-13-2008, 09:38 PM #9
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Default Re: dim beam

Yes you can use a dead diode for a dummy load, but I recommend you set the current with the diode you're going to use, use the dead diode to test the driver, not to set the current for the other diode. 6 AAs will be ok.
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Old 05-14-2008, 06:30 PM #10
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Default Re: dim beam

if you did dissconect the driver at all, then you could have blown the diode by the capacitor discharging on it.
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