Guide: Boba Fett Chest Display

If you are making a Boba Fett costume, the display on the chest piece can be especially troubling.  Outside of a one or two available on, there isn’t a lot available.  Leaving a builder to come up with alternate displays.  Such as using a decal or placing a light behind a printed graphic on transparency sheet.  Cheap and it looks ok, but is not animated.  An animated display is much more appealing.

In this guide, we will go over how to create an animated display for the boba fett’s chest armor.  You will need at least beginner soldering skills to complete the circuit.  All the parts add up to less than $40.

Boba Fett Chest Display v2


  • Solder Iron & Solder
  • Wire Cutter
  • Solder Wick

Part List:

  • 2 – Red LED Bargraph Displays
  • 5 – Red LED 0.3″ CA 7seg Displays
  • 5 – 33 ohm resistors
  • 5 – 1k ohm resistors
  • 5 – NPN Transistors
  • 1 – 1uF capacitor
  • 1 – 10k ohm resistor
  • 1 – AA Battery Holder w/ Switch
  • Some wire (to connect the boards)

You can purchase all the above from mouser, use this link for a ‘one click purchase’ part list:

Lastly, you will also need the two PCBs and a programmed chip.  I sell the custom parts for cheap.  Email me for details.

Alternately, if you have means to program chips yourself (arduino), you can purchase the custom parts yourself.  Source code can be found on codebender.


Once you have gathered all the parts, you can begin putting it together.  Start with the bargraph board.

  • Examine a bargraph display part and look for the small notch in one corner, this marks the anode side.
  • Examine the bargraph display PCB.  With the bargraph picture side facing you and the 6pin connector on the left, the top is the anode and the bottom is the cathode.


  • Solder the two bargraphs into place, being careful to install right side up.  They will not function is installed upside down.

Next is to solder the rear parts on to the main board.

  • The row of ten resistors at the top are labeled 1k and 50.  The part list does not include 50 ohm resistors.  Instead any value from 33 to 47 may be used, lower is brighter.
    • Solder on the 5 x 1k ohm resistors to the spots marked with 1k.
    • Solder on the 5 x 47 ohm resistors to the spots marked with 50.
  •  The next row down are the transistors.  Orient the transistors so the flat side faces the same way as pictured. Solder them in place.
    Optionally, after inserting each transistor into the board, you can fold it down flat against the board before soldering.  Thinner circuit is easier to install in your chest piece.
  • The remaining two parts are the capacitor and 10k resistor.  Solder in place where indicated.
  • Clean up.  Turn the board around and clip the excess leads off.


Now to solder the front parts on the main board.

  • Examine a digit display part, look for the small notch. This marks the orientation.
  • Insert each of the 5 displays, but do not solder down yet.  Double check that they are inserted right side up. They will not function is installed upside down.
  • You may now solder the displays.  The solder points are between the resistors on the other side.  Use the solder wick to clean up any unintentional solder connections.
  • The final part to go on the front of the main board is the chip.  Again, note the notch for the orientation.


Last is to wire the two boards together and power up.

  • Figure how much space you need between the two displays.
  • Examine the area on each board labeled display connector.  The line next to one of the pins indicates orientation.
  • Cut 6 wires to cover the distance between the connectors adding an extra inch for positioning.
  • Solder each of the six wires, positioning pin 1 to pin 1, pin 2 to pin 2, and so on
  • Connect the battery pack, the wires are color coded. Red goes to +, Black goes to -.  Do not mix these up, you will destroy the chip.


Power it up and enjoy!


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  • Richard Burley

    Hi there, can I just say this is brilliant!!!! I really need to make one of these!! I’ve literally no idea what I’m doing though. Apart form the list you’ve put together I need the PCB’s and a chip that I can get from yourself? This seems really daunting!!

  • Dustin

    Assembly guide above is straightforward. I always try to make the DIY Unassembled Kits I sell easy for soldering beginners to put together. This project is a 3 out of 10 difficulty. The hardest step is making sure that you install the displays upright.
    Send me an email and I’ll get you set up.

  • moses navarro

    I noticed the parts list has a 1 microfarad capacitor listed. But the identification on the board says .1 microfarad. Which is the best value to use? Does it just change the display change rate? Thanks!

  • Dustin

    The value is approximate. Use what you have on hand. More info on bypass capacitors:

  • Jason Leibowitz

    I love this. Thanks for this. I am semi-novice – - but I think I can handle it. You don’t list what man board to buy. Secondly – I am think I can program the chip on my own. But need to read up how. I have done minor audrino programing. But I usually dump it onto a main driver board like UNO or adafruit trinket. I am not sure how to get the code onto the chip.

  • Dustin

    The main chip is an Attiny4313, DIP package. Are some good guides online how to turn your arduino into an ISP programmer, then you can program the Attiny4313 chip directly from the arduino software.

  • Felix Salazar hi can i use the 2313 chip? 4313 and 2313 are in the same datasheet the diferences are en the size of memori and ram

    Memory Size Summary
    Device Flash EEPROM RAM
    ATtiny2313A 2K Bytes 128 Bytes 128 Bytes
    ATtiny4313 4K Bytes 256 Bytes 256 Bytes

  • Arcevine

    Could you tell me where to find 2×3 pin connectors with color leads for 2 pcbs?
    In advance, thank you for your return.

  • Dustin

    Yes, you can use an attiny2313 chip. Below is the output for compiling for each chip.

    Sketch uses 1,262 bytes (30%) of program storage space. Maximum is 4,096 bytes.
    Sketch uses 1,254 bytes (61%) of program storage space. Maximum is 2,048 bytes.

    FYI, you can get faster replies by emailing me.