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Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Drivers, Test-load, Power Supply, & Batteries



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Old 08-31-2012, 05:23 AM #33
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Default Re: AMC 7135 driver QUESTION!!

If you can check the driver on scope and see if you have a spike on startup or something unusual.


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Old 09-01-2012, 11:41 AM #34
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Default Re: AMC 7135 driver QUESTION!!

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Originally Posted by foulmist View Post
If you can check the driver on scope and see if you have a spike on startup or something unusual.
Thanks, but I don't have an oscilloscope...

I spoke to Lazeerer though and he pointed out that I had been using the wrong pin setting for Juffran's Test Load. He said the red setting, I was using, was only for 650 - 670 nm diodes, NOT the 635's! The 635's have a lower voltage drop and so pin 2 must be used! I tried this and got 1.4 A! It also means that my first attempts to solder the chip had probably been successful, so many hours wasted there...

He also said that there are 2 possibilities; 1 the driver had a current spike, 2 I could have made a continuous path to negative through the heatsinked driver. Unfortunately I can't test either of these, as I don't have a scope and I had already disassembled the pill by the time I spoke to him.

Anyway, If I manage to reconnect the diode bond wires I will start a new thread and explain how to do it. again for everyone's input!
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