Recent content by Hoop
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"Thor K 2012" -An Lk14 build (600 watt Q4559X)
It was a greenish yellow kind of color. Real bright.- Hoop
- Post #18
- Forum: Homemade and Modified Flashlights Discussion
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"Thor K 2012" -An Lk14 build (600 watt Q4559X)
Ah, has it been 10 years? Bump for an old CPF classic, the LK14! There were some coyotes howling in the field the other day. Shined the LK14 in their direction and I could see two sets of glowing eyes way off in the distance, and everything in between. They were about 1,000 feet away. It's...- Hoop
- Post #15
- Forum: Homemade and Modified Flashlights Discussion
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33mm, 25A, 35V, adjustable LED driver - fits D-cell tubes! - thermally protected
Does the driver feature reverse voltage protection?- Hoop
- Post #35
- Forum: Sold/Expired/Completed
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33mm, 25A, 35V, adjustable LED driver - fits D-cell tubes! - thermally protected
What type and value of thermistor do you recommend?- Hoop
- Post #33
- Forum: Sold/Expired/Completed
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33mm, 25A, 35V, adjustable LED driver - fits D-cell tubes! - thermally protected
I understand, thanks. Yep, I am after the 25A version for the sr-90 mod. I also want to do a mag mod with one of these and that one should probably be 16.7A. Why offer versions other than the 25A one if the current limit is adjustable? Is there a downside to the 25A such as higher dropout...- Hoop
- Post #31
- Forum: Sold/Expired/Completed
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33mm, 25A, 35V, adjustable LED driver - fits D-cell tubes! - thermally protected
I see that you addressed the switch wiring in your other thread: https://www.candlepowerforums.com/vb/showthread.php?393212-Feeler-thread-0-25A-adjustable-linear-driver&p=4608551&viewfull=1#post4608551 Seems the switching pot will work without requiring an external mosfet to handle the current...- Hoop
- Post #29
- Forum: Sold/Expired/Completed
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33mm, 25A, 35V, adjustable LED driver - fits D-cell tubes! - thermally protected
Does this iteration of the driver feature a connection for an external temperature sensor? "By connecting the H terminal to C, you get high, and by connecting L to C you get low. Disconnect both and you have OFF. The driver draws about 12 mA in off mode. This could be eliminated by using...- Hoop
- Post #28
- Forum: Sold/Expired/Completed
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33mm, 25A, 35V, adjustable LED driver - fits D-cell tubes! - thermally protected
DIWdiver, your inbox is full.- Hoop
- Post #26
- Forum: Sold/Expired/Completed
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33mm, 25A, 35V, adjustable LED driver - fits D-cell tubes! - thermally protected
It's about time to take apart the old SR-90 and put an SBT90.2 in it. I'd like to buy one of your boards in 1s config, with 2.7v cutoff. The plan is to use a double pole switch for on/off, and an external pot for dimming control. And a fet wired to the switch as well for aux power. ;)- Hoop
- Post #24
- Forum: Sold/Expired/Completed
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A pointer on scribes
Looks nice. Is it on a hinge with a spring? Brass has virtually no springiness to it and will stay bent when it is bent. Grade 5 titanium is an excellent material for a clip like this.- Hoop
- Post #3
- Forum: Flashlight Related Materials/Mechanical/Machining
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How do I power 18 x 10w leds
Is there enough voltage overhead from a 12v power supply to power 12v LEDs with a DC-DC driver?- Hoop
- Post #9
- Forum: Non-Flashlight LED Forum
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How do I power 18 x 10w leds
Doesn't a parallel string have the advantage in a failure scenario? The remaining LEDs stay on and distribute the current. If an LED dies in a series string the whole string turns off. If one dies in a 4s4p array, the remaining 12 LEDs will take on the current from the 4 dead LEDs which is an...- Hoop
- Post #6
- Forum: Non-Flashlight LED Forum
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How do I power 18 x 10w leds
Hi, Fswc39. Welcome to CPF. If you aren't dead set on using that 12v power supply of yours you could use an adjustable constant current AC/DC led power supply like the MEAN WELL HEP-185-12A. That outputs ~12v, so all LEDs would be wired in parallel and the current split between them. The...- Hoop
- Post #2
- Forum: Non-Flashlight LED Forum
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Sold/Expired Henlin SL-3570, HID Spotlight
That's a nice stout HID light right there. Pretty cool.- Hoop
- Post #2
- Forum: Sold/Expired/Completed
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Viability of QTC -- is it "over" or is there still some way to make it work reliably?
Re: Viability of QTC -- is it "over" or is there still some way to make it work relia Very fine threads should help with the brightness accuracy. The mechanism can also be designed to transition into true direct drive at maximum crush level. I've designed and modeled a 10mm qtc...- Hoop
- Post #11
- Forum: Homemade and Modified Flashlights Discussion
