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Old 09-23-2009, 05:37 PM #17
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Default Re: need driver help schematic with diagram has no protection diode

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Originally Posted by lasersbee View Post
IDK.... wouldn't the first choice be to contact the seller....

Or am I the only one that goes back to the Seller/Manufacturer
if something is questionable about a product...
Then... if it doesn't pan out... I will look elsewhere for answers...

BTW.... looks like someone didn't discharge the 47uF cap....
before connecting the LD...

Jerry
i shorted out the cap and even checked it with my dmm............... and also contacted the seller who seems to be of no help, and the current was set with a dummy load of a 1 ohm resistor and enough diodes in series to get a 4.5 volt drop......


and i dont even know what kind of diode that was, but for the price and the power it looked like it had, i dont think ill be able to find anywhere else



Last edited by sciullo779; 09-23-2009 at 05:42 PM.
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Old 09-23-2009, 06:00 PM #18
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Default Re: need driver help schematic with diagram has no protection diode

Quote:
Originally Posted by sciullo779 View Post
i shorted out the cap and even checked it with my dmm............... and also contacted the seller who seems to be of no help, and the current was set with a dummy load of a 1 ohm resistor and enough diodes in series to get a 4.5 volt drop......


and i dont even know what kind of diode that was, but for the price and the power it looked like it had, i dont think ill be able to find anywhere else

That's just a PHR diode. You can get them from at least three different websites (two if which I mentioned above) and in the BST section here. VERY common diode, also WAY too expensive from that ebay seller.

Also, regarding your driver, as I said before as long as you have assembled it correctly it will work. That circuit has been built hundreds of times on this forum alone, with GREAT results. I myself have built at least 20 of those drivers. Without a picture of your driver, it's impossible to tell what went wrong.
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ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

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Last edited by ElektroFreak; 09-23-2009 at 06:16 PM.
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