TL;DR
A ToolGuyd writer says a handmade Halloween costume and electronics-filled prop worked well enough for a school costume day and evening celebrations, making his son happy. One printed side panel broke during the day and was repaired with glue and screws; the account also details design and wiring changes the maker would make next time.
A handmade Halloween costume prop built with 3D-printed parts, RGB LEDs and a Raspberry Pi Pico 2 worked for a school costume day and Halloween, according to a ToolGuyd report, although one side panel broke during the school day. The maker repaired it before later celebrations and said his son was happy with the result, while noting that the rushed build left room for improvements.
The maker said the prop’s assembly included parts joined with epoxy. A side panel detached about halfway through the school day. He attributed the failure to the epoxy separating layers of the printed filament and said clamping the parts together had been difficult, which may have contributed. Before the evening class party and Halloween, he reattached the panel with cyanoacrylate glue and drilled holes for machine screws to secure it.
The final prop included a redesigned side panel to house electronics, a circular front cone and a white cover plate intended to diffuse and protect the LED element. The lighting came from a seven-pixel RGB board, with separate color controls. The access panel housed a battery holder, mounting points for the Pico 2 and four switches. The maker used Wago lever connectors for wiring splices, saying there was not enough time to refine the connections further.
The controls were programmed for a cyan power-on state and red, green and blue responses to corresponding buttons. The maker also tried to use AI to generate code for brightness and blinking effects, but said the attempt did not work well and was set aside. Decorative hoses were omitted because of time constraints, while their brackets remained on the prop.
A Working Build With Visible Tradeoffs
The report offers a practical account of a project that was usable but not fully refined. The broken panel did not prevent the costume from being worn, and the repair let the prop remain in use for later events. But the failure also showed how printed parts, adhesive joints and difficult clamping can affect a build’s reliability.
For readers interested in hobby electronics or making costumes, the account documents specific choices rather than presenting the project as a finished design. The maker identifies possible changes—including mechanically joining the printed sides, revising the straps and making electronic modules removable—that could guide a later version. These are the writer’s own observations, not tested claims that the proposed changes would prevent future failures.
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How the Prop Was Built
The costume was made for the writer’s son to wear on a school day when children could bring costumes, as well as for the class party and Halloween. The child requested duct tape as a visual detail to suggest damage. The report says he wore the prop alongside camouflage pants, sometimes a headlamp and a camouflage face mask. He declined some additional “wasteland wanderer” props, or there was not enough time to use them.
The maker changed the design during construction, including turning the front cone into a full circle. That meant the prop had to be placed facing upward when set down. He also redesigned a battery-holder bracket after finding that one holder was unreliable, and printed test pieces to adjust small hole sizes. The source describes the work as a first attempt and says the enclosure used substantial filament, making it easier to iterate on the side panel than on the whole body.
“For a first attempt, it worked. But if I had more time I could have made it more reliable.”
— The ToolGuyd writer
What the Next Version May Change
The report does not establish exactly why the panel failed. The writer said the epoxy tore away layers of filament and suggested that difficulty clamping the assembly may also have played a part. No controlled test or later inspection is described, so the precise cause remains uncertain.
It is also unclear whether the maker will build a revised version or when. He floated several possibilities, including using translucent cast acrylic, mounting the LED directly to the enclosure, adding connectors for removable electronics and moving components inside the enclosure. These are ideas for future work, not changes already made. The source does not report how long the repaired panel held or whether the proposed electronic effects were later completed.
Possible Revisions After Halloween
The maker said he may work on a more refined update after the new year, while also considering other projects. Potential revisions include mechanically joining the left and right printed sides, adjusting the shoulder straps, relocating electronics and adding connectors so parts can be removed or swapped. He also suggested adding decorative elements or sensor and sound features, though he described those additions as possibly becoming a separate build.
No timetable or confirmed next build was provided. For now, the account closes with the prop having served its immediate purpose, alongside a list of lessons the maker could apply if he returns to the design.
Key Questions
What happened to the Halloween prop?
A printed side panel broke off during the school day. The maker reattached it with cyanoacrylate glue and added machine screws before the evening events.
What electronics did the prop use?
The prop included a seven-pixel RGB LED board, a Raspberry Pi Pico 2, a battery holder and four switches. The buttons controlled cyan, red, green and blue lighting states.
Did the AI-generated lighting code work?
The maker said a quick attempt to generate code for a brightness ramp and blinking effect did not work well, so he set those effects aside.
Will the maker build another version?
He said he might make a more refined update after the new year, but did not confirm a schedule. He listed possible changes to the panel, wiring and placement of the electronics.
Source: toolguyd.com
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