don't use bullet connectors. solder directly.
Originally Posted by
kingjamez
Hi Guys,
I just burned out 2 brand new diodes with my FlexMod P3 and would appreciate it if you could help me diagnose why I'm killing diodes:
The first is a S06J diode purchased pre-installed in a copper module. I hooked it up to the Flexmod P3 that was connected to a regulated 9.0 vdc power supply. The Flexmod P3 was tuned with a fluke multimeter for 35ma bias current and 165ma full current for initial testing. The S06J diode was connected to the Flexmod P3 with 2mm bullet connectors.
The first time I used the diode I turned on the power and the diode started to lase at the bias voltage. I then connected the modulation lead of the Flexmod to 5v to set the current draw to 165ma. The diode responded and brightened as expected, for about 2 seconds, then dramatically reduced in brightness. It never recovered. It's now a 405nm led.
Thinking I just had bad luck, I then ordered an Osram PLTB450B again pre-installed in a copper module. It arrived yesterday and I used the same setup to test it. The only difference was that I set the full current to 1.00 amp with the fluke multimeter. Again, the diode lased at 35ma bias current, but this time when I applied the 5v modulation input for full current, the Flexmod went red and the output to the diode stopped. I disconnected the interlock, and reset the Flexmod to low current. I then reconnected the interlock and the diode lased again at 35ma bias current. I again applied 5v for full current, and the Flexmod went red again. However, now after resetting it, the Flexmod will not light the diode at all even at bias current. It is completely dead, no output at all and the Flexmod always stays red when it is attached.
Now, I would suspect the Flexmod is killing the diodes. However, I have it running other 405nm and 445nm diodes with no problems. In fact it's powering an old A140 diode at 1 amp right now and working like a champ (exactly the same setup that just killed the Osram).
Any ideas?
-Jim
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.