NUBM47-A1 Diode Block Questions

[polarbeam488]

Hi everyone, I recently pulled a NUBM47-A1 block out of a Casio XJ-V10X projector, along with a bunch of other optics. Does anyone have any information on the pin-out of the PCB? And is it worth trying to get the diode driver from the projector working or is there too many interlocks that prevent it? Also what is the best way to get the black epoxy off of the PCB if I wanted to extract the diodes? Also I found what appears to be a big red led chip, is there any use in one of those other than a red flashlight? Thanks.

 

[Ricker]

Epoxy: large flathead screwdriver, put it between the epoxy and wall, then turn. Make sure you wear safeties because that stuff shatters and goes everywhere.

 

[RedCowboy]

Yes a flat head screwdriver like Ricker said, push it down and twist, then I cut the pc board between each diode and use the solder blob method along with a pick to pry up and remove each piece of board from the pins while applying the solder blob.

The pins are offset and the top right pin as seen from the back is positive, all the diodes sit with the offset pins towards the center line of the block.

 

[polarbeam488]

Yes a flat head screwdriver like Ricker said, push it down and twist, then I cut the pc board between each diode and use the solder blob method along with a pick to pry up and remove each piece of board from the pins while applying the solder blob.

The pins are offset and the top right pin as seen from the back is positive, all the diodes sit with the offset pins towards the center line of the block.

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Awesome, thanks. I traced the correct pins on the connector, there are 2 pins per each anode and cathode, I just looped the wires back around with the connector to connect each string in series. Another question is what is the best way to focus the beamlets into a straight beam? I expected all of the beamlets to be parallel like the arrays.

 

[RedCowboy]

The gang lens is pretty poor for making beams, it's best to remove the diodes and build your own set up.
Here's multiple beams thread I was playing with a while back during covid.

The GBall blocks make better beams, not perfect but much better than the gang lens blocks.
If you can find a NUBM06 or NUBM05 they have the better divergence.

Thread 'Multiple beams'

Apr 26, 2020

Sheltering in place and being somewhat bored I bought a used projector for cheap with 2300 hours and harvested 24 x M-140 diodes that work very well, I am driving 4 laser diodes in series @ 1.6a using a LM338 as a current regulator using 0.8 ohms across the adj. and output pins and 8 x 18650 in series,.....my expideted mounts are angle brackets giving me X and Y adjustment so I can converge the beams where ever I want to.........thinking about what else I can do with all of these diodes.......maybe knife edge a bunch ? Anyway just goofing around and thought I would post a couple of...

• RedCowboy

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