10 000ft cloud cover
The pictures are not very clear because they were all handheld, I will be doing a better photoshoot using a tripod in the near future.
I can’t wait to see how impressive the beam is using a CFT90 5x more lumens will make a much more visible beam.
If the led you use has 450 lumen as I have read in your parts list,you mean that the CFT-90 has only 5X450=2250 lumens?I wait to put one in my GT, thinking that the CFT-90 will have at least 5000 lumens.
Am I waiting in vain,because it is unable to give those 5000?
The LED I originally planned to use in this light is actually not as good as we thought it was due to a measurement error.
I need to edit the parts list, sorry.
The LED being used is currently a black flat, with about 900-1000lm.
Looking at picture nbr 15 a friendly (and probably unnecessary) advise: watch out with aeroplanes nearby!
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If you shine this -flashlight -searchlight at one, even accidentally, they will report it and you might get into trouble.
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Apart from that: amazing light with amazing throu, congratulation of this terrific build!! :+1: :+1: :+1:
I have seen this as well, but the design seems not well cooled
He went a very easy way and simply bought a complete Constand Voltage module, externally PWMing it
He has practically all heat generating components on a slave board,
which is externally PWMing this with an external P-FET
I hope he is only PWMing low output levels with the external MOSFET to get Moonlight and get the higher Output regulated over the output voltage,
but still he is using a CV module for a CC operation which is not ideal
It uses P-FETs which are in general a lot less good than N-Types
My design has all heat generating FETs close to the edge and with at least 2 layers heat conducted to the outer diameter
Thanks you, and thanks to lexel for posting more info about how driver development process!
That’s nice, although I wanted a lot more power than 20 amps
With lexel’s driver I will be able to push the CFT90 to the limits of my watercooling system.
It has 8 dip switches on it too that allow me to change the maximum current by multiples of 6 just in case the watercooling isn’t enough for 48 amps haha
Had to restore my password and log in, just to compliment you on this project. Been following it, and I like it, I like it a lot!
Also have a question: What was the reason you went with a pretty thick, (1/4”?) backplate and not a thinner one?
Another thing, I saw you mentioned that something was touching the reflector edge earlier, have you solved that? Because if there is just the slightest pressure on these reflectors, it will deflect them and you get bad performance. Believe me, I know :cry:
They can report it but they’d have to find him first. That’s a large apt building with many others around. In a plane going 400+ miles per hour unless he had it on when they came around. You’d probably have better luck finding a needle in a haystack
Thank you!
The backplate holds all the electronics as well as the reflector, I though it would be nice to have it the same thickness as the tube body so that everything is the same, even though it is a bit overkill.
Better safe then sorry! Especially if this light is going to be carried around a lot.
And yeah there was a coolant tube slightly under 1/4” OD between the reflector and body which pushed the edge of the reflector and completely deformed the spot.
I had no idea they were so flexible! Luckily it caused no damage and just went back to it’s original shape, and now makes a much more clean die projection.
I replaced the tubing with some 3/16” tubing which doesn’t touch and is also softer, and now there is no problem.
PS- looking forward to your new carbon fiber superthrower
What about the GT mod with the CFT-90?Is the driver ready?And finally, is some guy ready to try this mod? Because I wait to see beamshots from CFT-90 as well as XHP70.2 leds,so as to make a decision which of the two to put in my GT, sending it to giorgoskok,(who is also a Greek member), to do the job,because I know his work from other mods he has done for me.
Yes, you do have quite a bit of stuff on the backplate, so in that regard the extra thickness certainly doesn’t hurt. And these reflectors are indeed very “springy” something I found out the hard way when I bonded one ever so slightly deformed (less than 0.5mm) and lost 50% performance, and the beam had a rectangular spot. :person_facepalming: The reflector itself was perfectly fine, but I had to return it to Phoenix and have it reinstalled.
Anyhow, I was wondering about another thing. How do you think the luminance on the CFT-90 respond to beaming light on the core, from a secondary light source? Compared to just increasing the current?
What I was thinking here, was if you installed a secondary LED in the vertex hole, with an aspheric lens, plus a bi or plano convex lens in front, and with the correct focal lenght, you could focus all the light from the secondary LED, directly on the core of the main LED. At some point, it would just overheat and burn up, but this stuff isn’t my field of expertise. Thoughts?