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- Feb 4, 2010
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UPDATE WITH RESULTS
This driver is a constant VOLTAGE (CV) driver, and not constant current (CC). Meaning pot adjustments on the board will alter the voltage the driver supplies, and the amperage will adjust accordingly..... which is not so good for diodes especially as they warm up.
tl;dr -- don't use this driver
Results from jnrpop:
And a word from paul with CV being an issue...
__________________
ORIGINAL POST
So I've been scouring around for drivers for the new 475nm and 505nm diodes... anyone have any experience with these?
Variable Boost Driver Board for 515nm and 520nm Green Laser Diodes - OdicForce
And if they're good, I'm also looking around for 488nm diodes which have very similar power requirements (6-7.5Vin 110ish mA). I would dare feed the 502 the nano's 275mA, but not a super expensive 488.
--
Are these drivers known to be good, bad, or unknown? If unknown, would anyone be able to test them for stability?
Conclusion: find something else
This driver is a constant VOLTAGE (CV) driver, and not constant current (CC). Meaning pot adjustments on the board will alter the voltage the driver supplies, and the amperage will adjust accordingly..... which is not so good for diodes especially as they warm up.
tl;dr -- don't use this driver
Results from jnrpop:
This was the conclusion from my testing:
Driver 1: min 145mA max 400mA @ 6.5V out
Driver 2: min 210mA max 410mA @ 6.5V out
Driver 3: min 460mA max 745mA @ 4.5V out
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Driver 1 & 2 was the 0-300mA 515-520nm boost driver from Odicforce
Driver 3 was the 50-1800mA 450nm Boost driver from Odicforce
Someone else will have to confirm if this Driver is indeed CV or CC, i can send High def pics if someone wants them.
My testing procedures, instruments, testload are all setup to the best of my knowledge and ive used the same setup to test other drivers and set them with no problems. Also i must say the other drivers i have set , x-boost, ebay drivers have all acted the same way; change in I with the + or - of Testload diodes
Driver 1: min 145mA max 400mA @ 6.5V out
Driver 2: min 210mA max 410mA @ 6.5V out
Driver 3: min 460mA max 745mA @ 4.5V out
------------------------------------------------------
Driver 1 & 2 was the 0-300mA 515-520nm boost driver from Odicforce
Driver 3 was the 50-1800mA 450nm Boost driver from Odicforce
Someone else will have to confirm if this Driver is indeed CV or CC, i can send High def pics if someone wants them.
My testing procedures, instruments, testload are all setup to the best of my knowledge and ive used the same setup to test other drivers and set them with no problems. Also i must say the other drivers i have set , x-boost, ebay drivers have all acted the same way; change in I with the + or - of Testload diodes
And a word from paul with CV being an issue...
The problem with using constant voltage regulators for laser diode drivers is the Vf is held constant while the current is allowed to increase with temperature and current. A driver should hold the current constant while allowing the Vf to change. It might not destroy the diode immediately, but it will eventually.....especially with longer duty cycles. Don't just take my word for it. Ask anyone you respect for their knowledge on drivers and laser diodes. I won't be using mine as configured. If you do, I hope you don't lose it on the first time out.
__________________
ORIGINAL POST
So I've been scouring around for drivers for the new 475nm and 505nm diodes... anyone have any experience with these?
Variable Boost Driver Board for 515nm and 520nm Green Laser Diodes - OdicForce
And if they're good, I'm also looking around for 488nm diodes which have very similar power requirements (6-7.5Vin 110ish mA). I would dare feed the 502 the nano's 275mA, but not a super expensive 488.
--
Are these drivers known to be good, bad, or unknown? If unknown, would anyone be able to test them for stability?
Conclusion: find something else
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