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Author Topic: Need help with my build. CFX with neopixel blade  (Read 43 times)

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Offline slash300zx

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Need help with my build. CFX with neopixel blade
« on: October 17, 2020, 10:06:08 AM »
Hi everybody, so this is my first time building a proper lightsaber and wanted to take on this project from scratch. I of course chose to go with a Neopixel build and went with a Crystal Focus X board. I even went as far as building my own hilt from scratch by designing and 3d printing my own custom parts.

So, I built the blade by using the parts from the custom saber shop. Used 2 sk6812 144 pixel strips with the pre-soldered pcb and 7 pin set (which also came with the 330ohm resistor installed). Followed all the instructions from the video available in there, everything had come out great. Then I did the board, used a Crystal Focus X mk2, wired it up using 22 and 24 gauge wires. I also used quick disconnect plugs for both the main switch and aux switch (momentary switches) and then I used another quick disconnect for the wires going to the hilt side pcb. I am using a 3.7v sony 18650 15a pcb protected battery.

I put everything together, turned it on but nothing happened with the blade. There was sound and everything, the switch lit up as well but no light... so I remember reading in the manual I was supposed to change in the config the amount of pixels I was going to be using so I changed it to 124 since that was the number pixels in the blade (times 2 since I used 2 strips) so from what I understand, I need to put 124, not 248, correct? Anyways, turned it on again and everything worked, blade was working but I noticed the pixels were flickering and didn't look like all were a steady same color. Flashes and deflection effects worked as well, everything worked except it looked a little weird so stupid me started messing with it, and I think this was my biggest mistake, I moved the blade a little and even twisted it while connected and turned on. In one of the twists, all the lights came on steady (no more flickering) but as soon as I let go, the blade turned off. The blade wasn't secured into place and was just in position to have contact with the pins but they weren't even pushed in when this happened since it was just sitting in the table while I just tested the setup.

Since then, all the sounds and switches work, I can change fonts and everything, all works except the blade lighting up.

These are all the tests I've done so far to try to figure out what's wrong. I checked continuity on all the wiring and all is good. Checked for any loose connections and nothing seemed to be wrong. Then I checked power going to the pcb and the positives have ~3.62v when I test with one of the led negatives, the ones coming from l1 and l2 on the board but when I test the positive with the negatives coming from l3 and l4 I don't get 3.62v I get random numbers... so I re-ran all the neg wires going to the hilt side pcb straight from the main board ground. It still didn't power on the blade. I took the blade apart, made sure all the connections were good and indeed everything looks good and there is continuity... so I thought maybe I fried the led strips somehow so I built a tiny little strip with about 20 pixels from the leftovers I had when I cut the strips for the size of the blade. Mocked it up to test and this doesn't turn on either... wth!!! So I charged the battery and nothing, used another battery and nothing, I formatted the sd card and reloaded it with a backup of the original and nothing (I changed the number of LEDs to 124 on the new formatted card) only thing I don't know how to properly test is the data line other than it has continuity... I tested individual pixels with a battery and wires and I get the individual led's to come on red so they are not fried I believe....

I'm not sure what else I can do here or what am I doing wrong? Any help would be greatly appreciated and I apologize in advance for the long post lol .... I can post some pictures or videos later Thanks