Blueray problems

[digital_blue]

Hey,

I'm running PHR-803t diode with a RKCSTR driver set at 110ma. When I hook it to a 9v battery, it starts bright but quickly dies to nothing. It's not heating up at all and the batteries are fresh.

Any reason behind this?

 

[john_lawson]

sounds like its the battery

 

[phoenix77]

If this happens even after you put in fresh batteries, then to me it sounds like a short circuit, that's draining the batteries so fast Check all your wiring to make sure you aren't grounding out somewhere. If you've used shrink tubing, & multiple strand wire, check to make sure that 1 or more strands of wire haven't poked through the shrink tubing to ground out anyplace rob

 

[digital_blue]

It's not the battery or a short. When it's hooked up to my power supply, the violet dot will start out very intense and will slowly start dimming until you can actually look right into the aperture. If you disconnect it and reconnect it quickly, it will stay dim. If you let it sit for a minute, then power it on again, it will suddenly increase in power again. The diode doesn't even get warm as it dims. I've managed to sneak a peek inside the diode(when it "dims" down) and there appears to be some yellowish orange light around the actual diode chip.

 

[laserwanabe]

I hope you have some kind of eye protection, you might have a problem with your battery connection wires. Only a drop in current would cause it to go up then dim, this same thing happens when i use almost dead batteries in my Dx green laser. Try more then one 9v and see if it improves.

 

[daguin]

It's not the battery or a short. When it's hooked up to my power supply, the violet dot will start out very intense and will slowly start dimming until you can actually look right into the aperture. If you disconnect it and reconnect it quickly, it will stay dim. If you let it sit for a minute, then power it on again, it will suddenly increase in power again. The diode doesn't even get warm as it dims. I've managed to sneak a peek inside the diode(when it "dims" down) and there appears to be some yellowish orange light around the actual diode chip.

The yellow/orange light is normal for these diodes. It is an artifact of the materials they are made from. When the diode is lasing brightly, you can't see it.

If it fades when connected to a mains power supply, the only thing I can think of left is the driver. Diodes don't fade and come back. Try hooking it up to a different driver.

Peace,
dave

 

[GooeyGus]

This is quite strange. Maybe check for a capacitor that was connected wrong, although I cant really see this happening with the rkcstr driver. This would cause output to fade as the cap charged but I would think it would happen really quickly unless you used a really big capacitor. Check to see if the IC on the driver is still getting warm/hot when the diode is 'faded'. Check voltage, current, all that good stuff. Maybe try a different driver if you have one, or a different diode, just to single things out.

 

[rog8811]

You could try measuring across one of the resistors on the drive circuit with a multimeter set to mv.

If the reading stays the same but the LD dims there is something wierd with the LD.... cannot think what :-/

If that reading goes down with the LD it is a driver/supply Problem.

At least by doing this you have reduced the possibilities.

Regards rog8811