Build

Construct the Eyes

To construct the eyes, first print the five 3d-printed parts, these are available from thingiverse. You will also need 1 x SG90 servo (complete with rotor arms and screws), 2 eyes and various length M2 screws.

Print the 5 3D-Printed parts
Attach the servo brackets to the top and bottom of the servo ensuring the thin part is at the top so there is sufficient room for the eye holders to move. Secure with a M2 screw.
Place the eye holder over the bracket and feed through an appropriate length M2 screw, ensure that the eye holder can move freely and repeat for the second eye
Attach M2 screws to either end of the long arm
Position the arm screws within the eye holders and attach to the servo using the provided screw
Attach eyes to the eye holders using hot glue, ensure that the mechanism moves freely
Solder 3 wires to the input side of the LED
Use hot glue to secure the LED to the centre of the eye mechanism
The optional 3D-printed servo holder may be used to help position the eye mechanism within the head.
Create an opening at the back of the dolls head using a Dremel
Remove the existing eyes
Position the mechanism within the head, and secure in place with hot glue, adjusting the position before the glue sets if required
Use plenty of hot glue but be sure to avoid the moving portions of the eye mechanism

Construct the Head

Find the centre of the second servo and attach the ‘double’ arm using the provided screw
Attach the servo to the head using M2 screws
Check the head moves freely in both directions
Use hot glue to secure the head servo holder within the body
Use plenty of hot glue!
Feed through the wire and slot the head servo into the holder
This completes the build! You are now ready to attach the micro-controller to the doll