Hello friends, I am trying to finish up a build for my fathers bday gift. His surprise party is this Sunday, so I don’t have much more time. (If I have to I can gift it and then ask for it back to finish but ehhh…)
I have a moonlight special driver build by Richard. It is powering a XML2 U2 1A emitter. From the start, I have not been able to pull more than 2.3A on turbo. The board has a total of 11 AMC7135’s so I should be able to get close to 4A. Can someone suggest a solution?
The driver has 5 modes (Moon—->10—>30—50—>75—>100%
Turbo Timer 60 sec with Mode memory.
At first I thought is was because of the host sk98. I tried another Convoy M1 type host. Same number-2.3a. I’ve also wired it strait to the battery. Same number. I’ve tried to give the relevant information, but let me know what else you may need to know.
Have you tried connecting the cell directly to the LED ( while it is well heatsinked) to see what current you get? If you connect battery to battery tube, is it brighter than when you measure with the DMM?
On a very similar build the standard leads on my multimeter compared to the 4mm2 copper leads 200mm long which I made up gave an increase in the reading obtained on the multimeter of approx 0.5 amps, I didn’t expect it to be that much of a difference.
Did you add the extra chips or did Richard? I’m pretty sure he would have tested it. I think most of us who have done chip stacking have at some point experienced this. Since you have a meter you can test each stack for continuity to it’s respective connection. Output pin to led-, ground to ground ring, pwm pin to pin 5 or 6. The moonlight special has one 7135 connected to one of those and the other seven connected to the other. It’s also possible to kill them with too much heat.
These high fV XML-2 leds also could not take high currents. From memory they were only reliable up to about 5 amps before they let out the magic smoke. This was powering then directly from my power supply.
I decided to swap out the emitter and take a reading with another xml2 t6 5a emitter that I had. The results were actually lower amps yet.
The U2 pulled 2.3a with the standard leads from my meter. 2.8a with the beefed up leads.
The t6 2.2a and 2.6a respectively.
I also tested an Olight s30 that I just got in the mail to see if my meter is working correctly. I got a reading of 2.9amps at the tail cap. So, I don’t think it is my meter and it doesn’t seem like it is the emitter as well. I’m thinking some is not working correctly with this driver. IDK?
I have tried and tested many ideas now and I cannot get over 2.8Amps with this driver. IDK what else to try? I guess it is decent bright and I like the driver anyway, so maybe I will just settle with this.
If anyone has any more suggestions let me know.
Ps. It is for sure notice meter. I have tested it and used it to test some other drivers and it is spot on down to .1Amps for sure.
I don’t have any lights that pull more than 3amps-not yet;)
I’ve also tested a convoy s3 and s2+ each with 8 chips. They measured 2.73 and 2.78amps respectively.
The board does have 11 chips.
I have been hesitant to connect directly to the battery, but that has been suggested a couple times so I will do that tonight. Then if my meter still reads under 3 then maybe my meter will not go above 3amps? We will see. I have an amp meter from Richard on the way so I can test with that when it gets here.