I just got done building this kit. Here's a couple of observations:
If at all possible reference the YouTube video when assembling the LED cube part of the kit. If you just use the written kit instructions it might make assembly more difficult/confusing.
Holes in the upper PC board are used as a jig to hold the LEDs while assembling the cube. This helps maintain the geometry of the cube & holds the LEDs firmly in place while tack-soldering them. The LEDs included in my kit were obviously smaller in diameter than the ones the YouTube person had resulting in my LEDs not staying in place while soldering. I found that putting a layer of blue painters tape on the board & then pushing the LEDs into the holes held them more firmly.
The LED cage/cube is surprisingly more rigid than I expected it to be once it was all tack-soldered together.
This kit was fun to assemble & I'm moving on to the 5x5x5 cube for my next project.
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Cons: it takes a long time to construct with many small parts. Lots os soldering
Pros; it is fun to put together and automatically presents a fun display of led light displays
optionally you can connect to a computer and learn some programming. Program is free.
Check out the Youtube video showing how to do the intricate soldering.
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This LED cube kit is just what a budding, young engineer needs. The quality, size, and function of the cube is what was needed.
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When completed, the cube produces some dazzling displays. The circuitry on the bottom board was pretty straight forward, however the cube portion requires some accurate measurements and a lot of patience to put together.
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I only opened these, I've not yet assembled them as I was practicing with a few of Velleman's less expensive kits like the LED Christmas Tree and roulette wheel. I am finding that the closely spaced pads take a smaller diameter solder to do well and that, unfortunately, on the other Velleman PCBs, they do not like to be desoldered... sometimes the contact pads become separated from the PCB and you just cannot re-solder them. With a bit of experience with their boards, and with my soldering equipment I will now tackle these LED cube kits. Like other reviewers, I wish Velleman would included a couple of paragraphs of theory to explain what the various components are doing and why they selected the values they have for resistors and capacitors, etc.
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