test load question

cheech226 · 02-04-2012, 10:10 PM

i am the proud owner of one of jufran88's test loads and i've noticed with some drivers, switching the number of diodes say from 3 to 6 makes no difference in the volts i read across the resistor. i'm not sure why...

Blord · 02-04-2012, 11:30 PM

That must be a boost driver. It will boost the voltage in order to met the current setting.
The driver is capable to overcome the forward voltage of the diodes. 3 or 6 diodes makes no difference ( to the driver maximum voltage limit of course ).

Fiddy · 02-12-2012, 06:39 AM

Yes, hence the constant currentz!

02-04-2012, 10:10 PM	#1
cheech226 Class 3R Laser Join Date: Jun 2011 Location: across the river from the big easy Posts: 1,113 Rep Power: 100	test load question i am the proud owner of one of jufran88's test loads and i've noticed with some drivers, switching the number of diodes say from 3 to 6 makes no difference in the volts i read across the resistor. i'm not sure why... __________________ i have fond memories of owning 10 hene tubes 2 argon ion units and lots of diode and dpss lasers in these wavelengths: 405,445,450,458,473,488,532,543,594,612,632,635,650,685,780 powers from 1mW to 2W+ laserbee a lpm Laissez les bons temps rouler!

02-04-2012, 11:30 PM	#2
Blord Class 3B Laser Join Date: Dec 2007 Location: Belgium Posts: 4,747 Rep Power: 255	Re: test load question That must be a boost driver. It will boost the voltage in order to met the current setting. The driver is capable to overcome the forward voltage of the diodes. 3 or 6 diodes makes no difference ( to the driver maximum voltage limit of course ). __________________ 405nm 400mW S06J C6 445nm 3W Big Boy, 2.8W Dominator, 2.4W Steel Laser 450nm 240mW PL450 C6 473nm 80mW Lasever 520nm 55mW Skylaser PL520 532nm 821mW Skylaser PL532, 133mW Jetlasers Ti-B 589nm no yellow 635nm 70mW Sanyo SenTorch 638nm 175mW Ehgemus, 1W Rook 660nm 1216mW Skylaser PL660, 263mW LPC826 C6 685nm 33mW Fujitsu FLD6A2TK C6 780nm 150mW Dilda 808nm 640mW C6 C6 rainbow collection !! 5 Watt Ophir LPM

02-12-2012, 06:39 AM	#3
Fiddy Class 3R Laser Join Date: May 2011 Location: Down Under Posts: 2,357 Rep Power: 209	Re: test load question Yes, hence the constant currentz! __________________ 405nm - 1,910mW (6) 445nm - 15,895mW (15) 450nm - 370mW (2) 473nm - 110mW (2) 532nm - 1250mW (6) 632.8nm - 2mW (1) 637nm - 5105mW (8) 660nm - 1,850mW (5) 670nm - 600mW (1) 685nm - 40mW (1) 808nm - 2,700mW (3) RGB - 400mW (1) In Progress: 405nm - 500mW+ Kryton Groove 445nm - 2,000mW+ C-88 520nm - 50mW Ultrafire RL-118 SS 632.8nm - 0.5mW Mini HeNe Safety Glasses 2x Eagle Pair OD4+ 190nm-540nm 2x Eagle Pair OD4+ 90-400nm & 580-760nm OEM Lasers OD 5+ 190-435nm & 730-1085nm LaserBee 5W Laser Power Meter >Fiddy's Review/Tutorial/Build Compilation Thread< >>FS: Custom Glow Rings<< >>>Plasma Speaker Kits (High Frequency Audio Tesla Coil) reserve yours today!<<< CajunLasers FTW!

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