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Final Week and Demo Day!!

A project log for HexTech Fishbones

3ft 3D-printed replica of Fishbones, a shark-themed device featured in the series Arcane, that has an articulating mouth and LED lighting.

pat-mutiaPat Mutia 03/10/2025 at 03:430 Comments

First we were testing out some of the LED rings and saw some of their connections had ripped, so they were fixed and resoldered. We taped connections together when routing all the wires throughout the device. Most of the wires were held in the tail and rib sections. The battery was routed outside along with the micro-USB to a laptop with the code.

After all the LEDs were tested and connected to the battery, we started working on the servo motor for the jaw and realized one motor was not strong enough to carry the jaw without kickback, so we got another motor from Kevin. We realized that the mounting tape we had been using was not strong enough to hold the motors up, so we ended up creating bolt holes through the 3D-printed jaw to help. Although in the end, the jaw did not move in the correct manner, it had the initial workings to getting towards the motion we wanted. Moreover, the jaw was misaligned overall, so the movement would have not been what we 100% wanted in the first place.

Then we mounted all the pieces together with double sided mounting tape. This was strong enough for most sections except the tail and ribs, where most of the weight of the electronics were, so we opted for duct tape. We kept the shield with the fin separate from the entire device to show off the electronics.

We made teeth from modeling clay and painted on little designs on the device with Posca markers.

Big thanks to Kevin and Fernando for helping throughout the term!

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