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Old 12-04-2016, 05:29 AM #17
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Default Re: Pre-Sale Beta Test Boost Drivers

Quote:
Originally Posted by 94Z28 View Post
What voltage are you running on the driver, and what curernt? Did you alter the driver's current?

If you are hearing noise, you are usually out of spec in either A.) Voltage or B.) Current

If you turn the current up, and have a HIGH Vf diode hooked up to the driver and a battery less than 4.2v it will whine trying to make the current, and the voltage. I have had great luck up to 2.4A with good LG HG2 cells and little to no heat what-so-ever at 4.2v - 3.7v and 1.8A

Guess it all depends!

Also, with the LPC-826 you really need to keep it below 500mA, I offered to send you my drivers made for those; they work great and have a max of 750mA and soft-start for those drivers. It's not a boost, just a simple linear regulator with a pot adjustment on it.

Sorry about the driver; should write me for some tips on it if you want, otherwise I can refund if your not happy! Thanks for feedback!
All good man. It is a beta and . I was running 1 cell. Its actually a square lipo pack with 4000mAh from a vape box I took apart. I didn't adjust anything on the driver just hooked it up to power and heard the mosfet noise and saw the output fluctuating. After some observation time I did turn the pot but didn't see much difference. The second driver is working great. I will hook up the troubled driver to my test load and see if something revealing happens. The reds just don't like me lol. I will be getting a JL 1w 650nm soon to fill that slot.


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Old 12-04-2016, 05:33 AM #18
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Default Re: Pre-Sale Beta Test Boost Drivers

Quote:
Originally Posted by dden4012 View Post
All good man. It is a beta and . I was running 1 cell. Its actually a square lipo pack with 4000mAh from a vape box I took apart. I didn't adjust anything on the driver just hooked it up to power and heard the mosfet noise and saw the output fluctuating. After some observation time I did turn the pot but didn't see much difference. The second driver is working great. I will hook up the troubled driver to my test load and see if something revealing happens. The reds just don't like me lol. I will be getting a JL 1w 650nm soon to fill that slot.

btw you cannot test these accurately on a test load with a wire wound resistor, the driver will not read correctly.
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Old 12-04-2016, 05:43 AM #19
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Default Re: Pre-Sale Beta Test Boost Drivers

Quote:
Originally Posted by 94Z28 View Post
btw you cannot test these accurately on a test load with a wire wound resistor, the driver will not read correctly.
Huh? You might be flying over my head. What are you talking about? I have the SL 20a test load. Ok or no go?

Last edited by dden4012; 12-04-2016 at 06:02 AM.
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Old 12-04-2016, 08:05 PM #20
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Default Re: Pre-Sale Beta Test Boost Drivers

Cannot test switching regulators with wirewound resistors.

Quote:
Also, beware of using the much more common wirewound power resistors for any test load connected to a driver that has an active switching device (FET, regulator IC, bipolar transistor, ect). Wirewound resistors behave as inductors when pulsed current passes through them. This can become highly reactive if the drive frequency hits near one of many resonance points, and would likely destroy the driver! Always try to use a purely resistive metal oxide coated or carbon high power resistor for a load resistor in that sort of circuit.
Here is a thread: Trying to adjust output. Help!!


I know most of you guys trying these out plan to adjust them, but I do set them properly and test on M140's (unless it's meant for something else) and I have 3 drivers working great right now. Chrisbee's will be shipped next; Just ran some testing trials on it this weekend.. have switched off+on around 100 times and driven off one LG HG2 cell.. It's stout.
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405nm HL LaserBTB
JL PL-E Pro - NUBM07E
JL PL-E Pro 2W 445nm LPM @ 2.3W
M140 + SXD in Maglite until NUBM44 arrives

5mw Green laser 301 - 50mw Avg
532nm Star Pointer 60mw avg 115mw peak
Wicked Laser Nano w/ FT Module - 70mw
PL-E Pro NDG7475 In Progress

650nm LPC-826 in Custom Polished Heatsink
650nm LPC-826 Hugsby XP-2 EDC Build

1000+Lm Maglite XP-L @ 2.7A
BLF D80 Led Light Anodized
BLF A6 Anodized + Bare
CUSTOM 1600LM XML2 1A MTN

Hyperion LPM
Hantek 6022BE (DS Oscope)
"Budget" Bench Supply (Chinese)
HP Agilent 6289A (1.5A PS)
Hakko FX888D


Laser Build Estimation Tool @ HobbyLP
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Last edited by 94Z28; 12-04-2016 at 08:07 PM.
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