Step 2: What you need
* IC1 - Atmel ATMega8
* LCD1 - PCD8544 (Nokia 3310 LCD display)
* ZD1, ZD2 - 3,6v Zender dioes
* C1 - 10uF capacitor
* C2, C3 - 20pF capacitor
* R1 - 1,5K ohm resistor
* R2, R3 - 68ohm resistor
* Q1 - 12MHz crystal
* D1 - LED diode (Optional)
You also need an USB cable, your standard soldering tools and thin wires. (As thin as possible. I used IDE cable wires, works pretty well.)
I did not have 3,6v zener diodes or 68ohm resistors available, but I had 3,2v zener diodes and 33 ohm resistors, so I used those instead. However, I highly recommend using the listed components! If you gamble like I did, the device might not be correctly recognized and might show up as "Unknown Device".
The LED diode is only needed if you want to know when there is activity and for debugging purposes, but it doesn't serve any other purpose and can be omitted if you like.
If you have trouble finding parts, may I suggest old broken electronic devices? Not only can you find most parts you need in old electronic devices, but you're also being "green" by recycling! All the parts I have used in this project comes from recycled components (Except for the ATMega8).
Datasheet for Atmel ATMega8 can be found here.
Datasheet for PCD8544 LCD display can be found here.