LED Cube/PCB Soldering Manual

A full schematic of the PCB can be downloaded here: Datei:Cube.pdf.

USB Resistors

First we solder R10, R11, R13, Z1 and Z2. As all resistors we are using in this project, their orientation is not relevant. You can see the resistor values in the schematic or in the table below, together with the color code marking:

Name	Value	Color Code
R10	68 Ohm
R11	68 Ohm
R13	1500 Ohm

USB Zener Diodes

Additionally, we need two 3.6 V Zener diodes for the data lines, Z1 and Z2. Here, you have to pay attention to their orientation. The (black) line on the diode is the same as the single line on the symbol (as opposed to the triangle) that is printed onto the PCB. You can see that in the figure on the left.

Reset Resistor

The Reset pin gets a 10 kOhm resistor R12 to the 5 V line. Again, have a look in the table for the correct color markings. Orientation is irrelevant.

Name	Value	Color Code
R12	10 kOhm

Column Resistors

@todo

Column and Row Connectors

@todo

Capacitors

We need four capacitors, two times 100 nF (C1, C2) and two times 22 pF (C3, C4). See the schematic at the left or the table below for their values and positions. Again, all four devices are symmetric and orientation is irrelevant.

Name	Value	Marking
C1	100 nF	104
C2	100 nF	104
C3	22 pF	220
C4	22 pF	220

Crystal

Now you should add the 16 MHz crystal U3. You do not have to care about its orientation.

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  16 MHz Crystal

Transistor Array

Now add the transistor array U2. Pay attention to the orientation! There is a marker in the package that can also be seen on the PCB.