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Assembling the ZIFduino USB 1.2 using ATMEGA168 microcontroller

ZIFduino USBThe ZIFduino, for all intents and purposes, is an Arduino with a ZIF socket. It’s geared toward those that want to do prototyping on the platform, but then move the ATMega chip to a stand-alone environment. The pin layouts are exactly the same, so it should be compatible with most shields designed for the Arduino.

The PDF of this instructable can be downloaded at

Step 1 Get the kit

The kit comes in two flavors. The board itself, and the full kit. There is also an option to have the FT232RL chip pre-soldered if you’re not comfortable working with SMT parts.

The kit can be purchased at

Parts included:
(1) ZIFduino board
(1) FT232RL chip
(2) 47 uF radial capacitors
(9) 0.1 uF ceramic capacitors
(2) 22 pF ceramic capacitors
(6) 1 K ohm resistors
(1) 10 K ohm resistors
(4) 3mm T1 LEDs
(1) 16 MHz crystal
(1) 1N4004 diode
(1) Resettable fuse
(1) 7805 voltage regulator
(1) Pushbutton
(1) USB B connector
(1) Power jack
(1) 3 pin single row male header
(1) Shorting block
(1) 6 pin dual row male header
(2) 6 pin female headers
(2) 8 pin female headers
(1) 28 pin ZIF socket
(1) ATMEGA168-20PU chip

The crystal and the 22 pF capacitors are in their own separate bag to prevent mixing up the capacitors.

Step 2 FT232RL

If you chose to have it pre-mounted, you can skip this step and the next.

Solder the FT232RL in place. There are a number of great tutorials for soldering surface mount parts all over the web. SparkFun has some good ones on their tutorials page, starting about half way down.

Step 3 Test your work

FT232RLI always like to test the chip before moving too much further. At this point it’ll be much easier to correct any problems.

Solder the C4 capacitor, followed by the F1 fuse, then the 3 pin male header.

Slide the shorting block onto the header, shorting the center pin with the one labeled USB.

Now solder the USB B jack in place. Solder all six pins, making sure you have a good pool of solder on the two larger pins. These are to ensure a strong mechanical connection, so be sure to fill the holes completely.

Take the board to your computer and go to There you will find the drivers needed for your platform. Extract them to the location of your choice and make a note of where they are. If you already have the drivers installed, you can skip this part.

I’m assuming a Windows environment here, but there are installation guides for others at the FTDI site.

Plug the board into your computer, and you should be greeted with the New Hardware Wizard. Point the wizard to the driver location noted above. After they’re installed, you will see a new COM port in Device manager. You’ve just successfully installed the FT232RL.

If you don’t get the New Hardware Wizard and you don’t see a new COM port in Device Manager, you’ll need to check your work. Take a look at all the pins under magnification and make sure they’re all soldered in place and you don’t have any lifted pins. Also check for solder bridges.

NOTE: There are two sets of pins that are intentionally bridged. Don’t try to remove those or you’ll have problems.

For more Detail: Assembling the ZIFduino USB 1.2 using ATMEGA168 microcontroller

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