LED_cube

# LED_cube production process
Pay attention to pitfalls! ! !
There is a flying wire on the PCB board. I don’t know why it is not connected. I welcome you to repair and supplement it.
## Let’s enjoy the two finished pictures first

! [d16079e9daf8e0d298869ddee5c19d8.jpg]
![2d2ed4b9291244d9d70619e1ab41b31.jpg]
## Preparation

material list

![66feeaceaa37edea9acfa152149773a.jp g]
### The size of the perforated board is 18*30cm Used
to make lamp bead fixing templates
[Taobao](https://m.tb.cn/h.5YqWoKd?tk=cqrQdu2TB3W) "Universal board single and double-sided bakelite green oil spray tin CNC fiberglass hole board universal PCB circuit board electrical welding"

### 2.54 single row pin header
specifications should be matched with the perforated board

### Arduino Nano
(I use 3.0) OwO can be used. The slightly cheaper 2.0 seems to be also available (waiting for verification by experts) Leave a comment) (#^.^#)

### 5mm LED lamp beads 1000 pcs/pack
I used blue, the color is actually arbitrary, it all depends on personal preference (but I think blue looks best)
Note: This product should be divided into full-transparent and frosted-transparent (theoretically speaking, frosted is definitely better looking) and it is more expensive. Here is a solution

- you can use sandpaper to polish each one (it is true that I am a bit useless) ### I use

0.6mm copper wire
The specification I bought was 100M, but it was expensive and cost nearly 30.

### 220 ohm 1% pin resistor

### 6*6*5 4-pin micro switch

### BD241C power transistor

### 2P wire The seat (including plug)
is actually optional. It can also be soldered directly to the board during wiring.

### The 3mm LED light-emitting diode
colors are red and green
and are used as indicator lights, so 5mm is not needed

### 25V 1000uf 10*17 Direct Plug Aluminum Electrolytic Capacitor

### SN74HC595N DIP-16 logic chip
emmm, I bought the wrong package for the first time, I bought it as a SMD, I am really speechless o(╥﹏╥)
oLightning protection: Uxin The genuine one is a bit expensive.
In actual testing, the one priced at 30 yuan/100 pieces can also be used (not that it cannot be used)

### The specification of the dual-axis button rocker sensor
is PS2 5-pin.
This is my first time using this thing. I don’t know what it is called. I still have it. I specially asked the bosses in the Lichuang exchange group. Thank you for your enthusiastic answers. Thanks♪(･ω･)ﾉ

---

The material list should be complete. Now let’s start making

## Making

### Diode transformation ( (I’m breaking it off)

How do you break off
the 8*8*8 light array in the picture below? It means that you have to break off at least 512 lights in advance to prevent any breakage. You can break off 20 more for spare
because it is a sinking type. Light array, so PCB diode spacing, perforated plate spacing and subsequent diode modification must be operated according to the requirements in the diagram, otherwise big problems will occur during assembly.
Note: In this project, the anode of the diode should always be facing
down. Come on! ! ! I broke off these 540 lamps for about a week (while I was in class at school) (#^.^#)
![8953a3de647940b40cd69f79b81cc1d.jpg] The first step was to straighten them first (you can also break them directly while straightening)
! [0707798c40f44c9e80de505876c11e9.jpg] Believe me, watch a movie to distract your attention after class, otherwise your hands will really hurt
! [2174f62dca4d7d4331f7b9e81a92f0e.jpg] It took twenty minutes to do this (don’t squirt if you work slowly)
! [ff7f846a093ee158de6f741cca029d1.jpg] I can’t find the picture after breaking it off o(╥﹏╥)o I won’t put it away
anyway. It’s a full box. After breaking it off, I used two boxes to put it in.

### Test the lamps
and diodes one by one, you must make sure They all light up
! [07b3cf7f03a61e919dddb35506ab4bf.jpg] Thanks to [Red Mushroom Desktop Power Supply] (https://oshwhub.com/xiangyang0926/xl6019-sepic_copy_copy). This project
can free me from the trouble of resistors (220 resistors have not yet arrived at that time) )

### Solder
the front side of the circuit board:
![afd7d5a5c2e3ed268db61e2cfcb96c6.jpg] The reverse side:
![b390a935fe1e7e3cbe3623db3314264.jpg] The first version of the PCB is as shown above (the register is not soldered, and the first time I bought the package, I bought the wrong one)
Silk screen printing on the front and back of the original version There was a big problem. After soldering for a long time, I couldn’t install it in the end. I even burned my hands o(╥﹏╥)o.
Then I changed it again. The second version will be easier to
solder. The reverse power transistor needs to be soldered ( As shown in the picture above) It is a little laborious, be careful not to burn your hands

### Assembling and welding LED lamp beads
Now the role of the perforated board comes
! [b111c0837cf8200c06636da030d4515.jpg] According to the picture above, assemble the perforated board and pin rows (six holes apart) Put) not more, not less.
The size here is still a bit small (after all, the price is cheap). The most economical solution is 4*4 (calculate the size by yourself).
Start assembling the first piece (the positive electrode is always facing down, and the negative electrode is to the right. )
![97158cb4398325ec629af62f7b5ef86.jpg]Here I am putting together two pieces (one column is not enough).
Let me show some process pictures. A total of 8 pieces are needed. The welding operation of each piece is the same.
This project can really practice welding skills
! [63d1123efc8d01fd1f70831f69834d0.jpg]
### The difficulty of welding the LED lamp bead layer

has come.
Let’s just look at the picture. It is more intuitive
to look at the picture. It is recommended to view the schematic diagram in conjunction with

the schematic diagram:
![LED Cube.png] ![New Schematic1.png] ![New Schematic2.png] ![ New Schematic3.png] ![New Schematic4.png] ---
Physical picture:
![868680c3809d9c5b002f7034e49f342.png] ![6a18ca734a0121b2c277ccb1c80b1fa.png] ![ed8447e03ca0349e73e07a797 2be53b.png ] ![9fcf06be40200ab08b24daa9b385542.png] ![2ba114887021d8b618cc1a096899d7e.png] ![ 9c8446ff7fdbc609f7fb775c1d5174a.png] ![cfb798b68dc9b6c0ff8cb861096cd9d.png] ![18c382c39affa13adef64cdd38d4bdd.png] ![e887e7543e04ad16b869638f5bd5d19.png] ![c8de0e8621ad5a5ce00ddd467fe420f.png] ![9b5dbb4e120731d692042edf0f3cc62.png] ![575886c70b892ba19db12729b2a7bf8.png] ![d93b09254c5e5bbbe3d8e59117a768a.png]
## 视频