Servo Mechanism 3.0 (featuring Jarvis)

$250 – $270


The pinnacle of Stark technology, this item is jam-packed with features with which to equip your helmet.

This latest iteration improves on all previous models before it, featuring a custom-designed PCB that contains all of the hardware in a wafer-thin package.

Installation Instructions

List of Included Features

  • Tilt Activation – simply tilt your head forwards or backwards to open or close the faceplate.
  • Touch Activation – using a capacitive touch sensor, you can now trigger the faceplate through your helmet’s walls  (includes a simple method for extending or enlarging the contact surface area).
  • HS-422 Servo – this unit is slightly larger than the previous version, but offers more power and 180 degree rotation.
  • Eye LEDs – powered by the same unit – no more rechargeable batteries required!
  • Built-In Power Switch
  • AA Battery Pack
  • Ambient Light Sensor – placing the helmet on your head will now automatically initiate the boot sequence.
  • 8ohm Speaker – custom voice files will now be available to inform you of what the unit is doing.
  • Voice Activation – simply speak a command, control any of the following
    • Open (the faceplate)
    • Close (the faceplate)
    • Eyes (turn on)
    • Eyes Off
    • Tilt (activate motion sensor)
    • Tilt Off
    • Touch (activate capacitive touch sensor)
    • Touch Off
    • Hit It (play signature music)
    • Power Down (reset the helmet to initial state)
  • Voice Training – by toggling a switch on the board, this unit is also equipped to learn your voice commands.

The circuitry measures 6 x 5 x 1 cm.  The battery pack measures 5.8 x 6.5 x 1.6cm.

Additional Required Items (not included in kits)

Additional Options

  • Eye-Lenses: the material in these glasses transmit light while simultaneously enabling you to see through from behind them.

Installation Instructions


  1. Use small pieces of electrical tape on the exterior of the helmet to secure the faceplate to your helmet.
  2. Turn the helmet upside down, and place the mechanism case (and servo) on the forehead tab. Position the entire mechanism so that the center bar (with eyes) fits securely against the inside of the faceplate and positions the LEDs above the eye sockets.
  3. At the end of the pair of long extension wires is a white JST plug. Push it through the hole in the center bar so that it leads towards the top of the helmet. The Eye Circuit should now be situated above the eye holes. (The wires from the LEDs can be secured within the 3D printed servo case next to the servo wires.)
  4. Use hot glue or double-sided tape to secure the center bar to the inside of the faceplate. Then, rotate the servo case 90 degrees. Apply glue or tape to the underside of the forehead tab, and then quickly rotate the servo case down to adhere it to the forehead tab.
  5. Once the servo mechanism is secure, you can remove the electrical tape that is holding the faceplate in place. Check to see that the movement of the faceplate moves properly.
  6. Take the circuit board and place it so that the end with the tiny power switch is facing the back of the helmet. The power switch should also be facing the “inside” of the helmet (toward your head).
  7. Secure the circuit board and the AA battery pack to the top of the helmet. I use Scotch Wall Mounting Tape (grey in color) to secure both, but hot glue or any other strong adhesive will also work. NOTE: be sure to leave access to the connection points (servo, eyes, touch, speaker, microphone).  Position the circuit board as close to the front of the helmet as possible (against the back of the servo).
  8. Secure the speaker behind the AA battery pack.
  9. Attach the servo, eyes, touch, speaker and microphone to the circuit board.  Position the microphone near the front of the jaw (encase the microphone in a small, plastic bag to prevent moisture from affecting its operation).
  10. Insert 4 AA batteries.
  11. To switch between VOICE TRAINING (VT) MODE and STANDARD (S) MODE, watch this video:
  12. Turn on the tiny power switch. You should see a red light appear on the Arduino board (rectangular, blue circuit board).
  13. In VT MODE, you will be prompted to repeat each of the commands in your own voice.  In order to capture recognition accurately, your head MUST BE IN THE HELMET during training.  The first prompt will say “Jarvis”.  Then a beep.  Wait a moment before speaking the word you want as the trigger (it doesn’t have to be “Jarvis”).  The unit will beep again – repeat the trigger word in the same tone.  Repeat once more.  If you’ve been consistent, the unit will beep three times and proceed to the next command.  If not, you will have to try again.  Do this for each of the following eleven (11) commands (again – you can choose your own words for each action below, but ensure that none of them are too similar, or Jarvis may become confused):
    1. You there? (prompts Jarvis to respond with, “For you sir, always.”)
    2. Open (opens the faceplate)
    3. Close (closes the faceplate)
    4. Eyes (turns on eye LEDs)
    5. Eyes Off (turns off eye LEDs)
    6. Tilt (activates tilt sensor which can also open / close faceplate)
    7. Tilt Off (deactivates tilt sensor)
    8. Touch (activates touch sensor which can also open / close faceplate)
    9. Touch Off (deactivates touch sensor)
    10. Hit It (plays signature music.  NOTE: Jarvis will not respond while music is playing)
    11. Power Down (returns helmet to startup state)
  14. When training is complete, the unit will enter startup mode.  However, I recommend that you turn the power off, and switch the unit into STANDARD MODE before interacting.
  15. The unit will now take an average reading of the “neutral” position and ambient light value. Try to keep the helmet in a level position, and wait for the eyes to flash once.
  16. Providing you don’t drastically change the amount of light entering the helmet, when you place the unit on your head, it should “boot up”.  Once the sound effect has finished, you can begin giving voice commands.

Watch this video for a summary (but not comprehensive) list of the steps above:

*Batteries not included.  Average delivery time is 3-4 weeks.

Additional Information

Kit Option

Servo Only, Servo with Touch Sensor

Eye Colour

White LEDs, Red LEDs


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