Attach the Lens -- Frame Method


Use four nylon M2.5 standoffs and eight screws to connect the lens to the HalloWing as shown, using an acrylic laser cut holder. You can use this file to laser cut your own from 2mm thick acrylic.


The lens will magnify the animation on the TFT as well as give the eye dimension when viewed at oblique angles.

Zip Tie Method

Feed thin zip ties through the holes at the bottom of the board, and then over the lens edges and back through the holes at the top.

Secure each end on the back side with a second zip tie like a fastener.

Trim the excess.

Eyeball Firmware

Follow the HalloWing Spooky Eyes guide for info on loading the Terminator eye animation onto your HalloWing, or for customization information.

Here's the tl;dr version:

Enter bootloader mode by double-clicking the Reset button and then drag this UF2 file over onto your computer. Then using your computers file explorer or finder, copy the file over to the HalloWing.  When the HalloWing is plugged in, it should look to the operating system like a flash drive named HALLOWBOOT. Copy the UF2 file to the HALLOWBOOT drive and your software should be set.

This guide was first published on Oct 16, 2018. It was last updated on Mar 08, 2024.

This page (Prepare the HalloWing Eyeball) was last updated on Mar 08, 2024.

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