Video Player help: In case you can't play the video go get the open-source VLC player from: http://www.videolan.org/

Before starting with this step, watch this video.

In this video you the assembly and testing of some components which are simple to solder is shown. These components are: - L1 - Ferrite Bead filtering noise out of the 5V coming from the USB host. - R4 - 220 Ohm resistor limiting the current for the PWR LED - C5 - 100nF cap buffering the 5V rail - PWR - green LED showing that the board is receiving power over USB - X2 - female mini-USB type B connector

After all these components are soldered, the green LED should go on once you connect your board to a computer…

Measure the voltage across C5. It must be within 5V +/- 5%.

Solder: - U2 - Linear Regulator 3.3V - C1 - 4.7uF cap buffering the 3.3V rail - C2 - 100nF cap buffering the 3.3V rail

Measure the 3.3V rail voltage over C1 or C2. The voltage must be within 3.3V +/- 5%.

Before soldering the next components, watch this video: [https://neuromorphs.net/2010-smd-usb/video/sc05-avr32-crystal.avi sc05-avr32-crystal.avi]

In case you create bridges between the microcontroller pins:

• make sure that they don't have to be there: Check with a blank PCB whether the two pins are connected by a trace directly in between.
• Remove extra solder to clear the bridge:
• Use another other soldering iron with a big tip
• Set this iron to maximum temperature
• Use the 0.6mmsolder wick
• Cut off the used parts of the wick and use the fresh end of the wickto minimize the energy being pulled away by the wick
• Turn off that iron after you are finished removing solder…

Now it is time to solder: - U1 - our USB microcontroller AT32UC3B1256 - Q1 - The 12MHz crystal

If you are confident that U1 and Q1 have been soldered correctly, you can solder the remaining (easy) components: - C8 - 100nF cap buffering the 3.3V rail - C3 - 100nF cap buffering the 1.8V rail - C4 - 2.2uF cap buffering the 1.8V rail - C7 & C6 - the 16pF crystal load capacitors - R3 - 47kOhm TCK pullup resistor - R1 & R2 - 39Ohm USB data lines series resistors - RST & DFU - the two micro switches

After plugging in the board to a computer, check all rail voltages again:

If any of the voltages are out of range 'disconnect the board immediately' and start visual inspection, and have someone else look at the board.

Let's check the oscillator: * Attach a wire to some GND pin. * Connect the scope ground clamp to the wire * Check the signal on C7, on the non GND side (not the C-side, the 7-side…) * You should see a (more or less sinusoidal) 12MHz signal with about 1Vpp amplitude…

Connect your board to a Linux computer, then run the command 'lsusb' in a shell.

Besides other devices you should see: bus_device}

To get further information on what Linux found out about the device, run 'sudo lsusb -d 03eb:2ff6 -v'

You should get this: bus_device}

' You made it till down here? Congratulations! ' Your board passed all tests that do not require a 'test-firmware' to be flashed…

Continue on the: '[wiki:2010/usb10/AtmelAVR32 Atmel ACR32 USB firmware page]'…