My last HackerBox, #0030: Lightforms, came with an 8x8x8 LED cube kit. I started building it in May, when I assembled the PCB and made a jig for assembling the grids.
I got busy over the summer and the thought of soldering 512 LEDs didn’t excite me. After catching up on all of my other kits, it was finally time to dive back in.
I thought I took some video of assembling the board, but I must have deleted it. So I didn’t bother with any video while assembling the grids either. The repetition would have been quite boring. I thought I’d do a gallery with captions for a change.
Assembled circuit board.
Simple circuit used to test the LEDs and compare brightness.
3D printed jigs. I ended up not using the grid one because my plywood jig fit much better.
My friend Kevin printed this awesome jig, which made bending the legs much easier.
Over 500 LEDs before and after being bent. It took over 90 minutes to test and bend them all.
One 8×8 grid all soldered in the jig.
All 8 grids completed without burning a single LED. I can’t believe I didn’t swap the leads when I bent them all.
Complete! Only had to rewire the cathode connections to the board because the instructions were actually wrong.
While assembling the 8×8 grids I settled on a pretty good system, so I recorded myself doing a couple of rows to show my method.
This is definitely my longest electronics kit in terms of hours spent and it had so much repetition. Pretty cool result. Here is someone’s demo showing what can be done with the cube.
I’ll need to upgrade the firmware so I can program the board with my own animations.
Quick unboxing video for the latest HackerBox.
Official box contents from the Instructable:
- HackerBoxes #0030 Collectable Reference Card
- NodeMCU V3 Module with ESP8266 and 32M Flash
- Reel of 60 WS2812B RGB LEDs 2 meters
- 8x8x8 LED Kit with 8051-Based MCU and 512 LEDs
- Reusable Plastic Parts Box
- Two 4.7 KOhm Resistors
- Eight 470 Ohm Resistors
- 10 KOhm Eight Resistor Array
- 40-Pin DIP Socket
- Eight 74HC573 Octal Latches
- Eight 20-Pin DIP Sockets
- ULN2803 Transistor Array
- 18-Pin DIP Socket
- Two 10uF 25V Electrolytic Capacitors
- Two 22pF Ceramics Capacitors
- 12MHz Crystal Oscillator
- Barrel Power Socket
- 4-Pin Serial Header
- Power Switch
- Cable with USB to 5V Barrel
- Red Hookup Wire
- 550 LEDs
- USB Serial Module with CH340G and Jumper Wires
- Stranded Hookup Wire 3 meters, 22 gauge
- Exclusive HackerBoxes Decal
- Exclusive Dark Side LED Decal
It’s disappointing that HackerBoxes resold us a popular kit that you can get for $15-20. I’ve seen these LED cubes many times online and while they do look awesome, I never bought one because I didn’t think I’d have the patience to put one together. I guess I’ll get the chance now.
I’ll probably try to do a time-lapse of this assembly, which is going to take a long time.
I picked up some new fidget toys from the Rooster Gear booth at Maker Faire Detroit.
It was $5 for 2 of their Flippy Chain Fidgets, which are simple, but extremely satisfying. A 2 pack sells for $7.99 on their Amazon store.
I also bought their Fidget Pad for $5, which is much better than my Fidget Cube. Normal price is $9.99.
I think we had a cube at some point as kids, but I never put any time into learning how to solve one. I recently watched a video (and part 2) from my YouTube subscriptions which pushed me to order this set of speed cubes for $10.99 on Amazon. I also learned of the existence of different sizes from that video. Figured they go well with my fidget cube and fidget spinners too. These speed cubes are different from the old school cubes we had growing up, because you can start to rotate a different area before completing a full rotation elsewhere. I used a step by step guide from You can do the Rubik’s Cube to learn the 2×2 and a series of videos from Think Maths for the 3×3.