- Apr 9, 2008
What is the voltage you are feeding the diode?
If your LD is hot as a "Glow Plug" then it is pulling a lot moreI starting to agree with laserbees end hypothesis.
The driver is a Constant Current driver that has an IC to control the voltage while leaving current set a given level. I don't know if you call this linear, or what...
As I say again this driver on the lowest output setting is 200mA, which is below threshold for 445nm. It will run blu-ray fine and 650nm LOC diodes without busting a sweat.
DMM is a Voltage across the diode is approximately 5.0v @ 250mA, so it should be lasing instead it's a glowplug. (ie, it's popped)
Here is a 20x DVD LOC running off the same C.C.Driver. Output here is ~3.3v at 380-400mA.
This is a long exposure shot at 2.5sec
5.0V? That's surprisingly high. That extra .4-.6V is going through the diode as heat, or straight damage to the diode. I say its a driver problem.DMM is a Voltage across the diode is approximately 5.0v @ 250mA, so it should be lasing instead it's a glowplug. (ie, it's popped)
Well, I did exactly what laserbee suggested to measure the current.100% agree here I have mine at 1.4A and it takes a good ~45 secs before the heatsink gets warm :wtf:
I am still waiting for Flamingpyo's slugs I ordered almost 3.5 / 4weeks ago. ( wait, has it been that long?)
hmm, what to do.