不知不觉又到这么晚，昨天实在不好意思，就转了那么一点就跑了，今晚一次性补上两个步骤。不过毕竟是英文，看多了也会疲劳哈，呵呵~另外说明，昨天的那张组件列表，原作者有给出价格清单，现附表如下。不过毕竟是国外价格，只能当作参考，但是总的来说也不是非常的昂贵，所以有兴趣有时间的朋友或许可以一试。

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

From futurlec:         Price    Units          Sum
comment

 

 

 

 

64x resistors. (see separate step for ohm value)0.02701.40
10x smallest available

 

 

 

 

1x or 2x large prototype PCBs.(copper eyes)2.9025.80

 

 

 

 

 

1x ATmega32 microcontroller6.9016.90

 

 

 

 

 

3x status LEDs. You choose color and size.0.0830.24

 

 

 

 

 

3x resistors for the status LEDs.0.02100.20
10x smallest available

 

 

 

 

8x 74HC574 ICs0.6084.80

 

 

 

 

 

16x PN2222 transistors0.10161.60

 

 

 

 

 

16x 1k resistors0.02200.40
10x smallest available

 

 

 

 

1x 74HC138 IC0.3510.35

 

 

 

 

 

1x Maxim MAX232 IC1.6011.60

 

 

 

 

 

1x 14.7456 MHz crustal0.7510.75

 

 

 

 

 

2x 22pF ceramic capacitors0.0520.10

 

 

 

 

 

16x 0.1uF ceramic capacitors0.10161.60

 

 

 

 

 

3x 1000uF electrolytic capacitor0.1830.54

 

 

 

 

 

3x 10uF electrolytic capacitor0.0530.15

 

 

 

 

 

1x 100uF electrolytic capacitors0.1010.10

 

 

 

 

 

8x 20 pin IC sockets0.0980.72

 

 

 

 

 

1x 40 pin IC socket0.1510.15

 

 

 

 

 

2x 16 pin IC socket0.0720.14

 

 

 

 

 

1x 2-pin screw terminal0.4010.40

 

 

 

 

 

2x polarized plug for pwr cable0.1520.30

 

 

 

 

 

4x inserts for plugs0.06100.60
10x smallest available

 

 

 

 

9x 8-pin terminal pins0.07100.70
10x smallest available

 

 

 

 

1x 4-pin terminal pins, right angle0.2510.25
(8x, cut in half)

 

 

 

 

2x 16-pin ribbon cable connector0.2520.50

 

 

 

 

 

1x 10-pin ribbon cable connector0.2510.25

 

 

 

 

 

Ribbon cable0.4583.60
(8 meters should be enough)

 

 

 

 

2x pushbuttons0.2520.50

 

 

 

 

 

2x ribbon cable plugs0.2520.50

 

 

 

 

 

9x 8-pin female header plugs0.1891.62

 

 

 

 

 

4 pin header for serial cable0.1510.15

 

 

 

 

 

Inserts for header plugs0.06804.80
(80 pieces)

 

 

 

 

8x optional pull-up resistors for layers0.02100.20
10x smallest available

 

 

 

 

 

 

 

 

 

Sum components from Futurlec:

41.91

 

 

 

 

 

1000 LEDs from eBay:

25.00
estimate w/ shipping

 

 

 

 

 

 

 

 

 

Total build cost:
USD66.91

 

 

 

 

 

 

 

 

 

 

Not included: Power supply (use an old ATX PSU), piece of wood

好了，进入这篇的正题，接着第三、第四步骤

 

Step 3Ordering components

We see a lot of people asking for part numbers for DigiKey, Mouser or other big electronics stores.

When you're working with hobby electronics, you don't necessarily need the most expensive components with the best quality.

Most of the time, it is more important to actually have the component value at hand when you need it.

We are big fans of buying really cheap component lots on eBay. You can get assortments of resistor, capacitors, transistors and everything in between. If you buy these types of assortments, you will almost always have the parts you need in your part collection.

For 17 USD you can get 2000 resistors of 50 different values. Great value, and very convenient.

Try doing som eBay searches and buy some components for future projects!

Another one of our favorite stores is Futurlec (http://www.futurlec.com/). They have everything you need. The thing they don't have is 1000 different versions of that thing that you need, so browsing their inventory is a lot less confusing than buying from those bigger companies.

（由于原文图较多些，所以只代表性的贴了两张，有兴趣的朋友可以看原文，原文地址链接在光立方制作全过程（一））

 

Step 4What is a LED cube

A LED cube is like a LED screen, but it is special in that it has a third dimension, making it 3D. Think of it as many transparent low resolution displays. In normal displays it is normal to try to stack the pixels as close as possible in order to make it look better, but in a cube one must be able to see trough it, and more spacing between the pixels (actually it's voxels since it is in 3d) is needed. The spacing is a trade-off between how easy the layers behind it is seen, and voxel fidelity.

Since it is a lot more work making a LED cube than a LED display, they are usually low resolution. A LED display of 8x8 pixels is only 64 LEDs, but a LED cube in 8x8x8 is 512 LEDs, an order of magnitude harder to make! This is the reason LED cubes are only made in low resolution.

A LED cube does not have to be symetrical, it is possible to make a 7x8x9, or even oddly shaped ones.

好了，晚了，先这样吧。。。