Prop Audio System Mount with Adjustable Magnetic Brackets

I'm a member of the Rebel Legion here in Washington state. Our local groups (501st Legion, Rebel Legion, Saber Guild, Mandalorian Mercs, Droid Builders, & Dark Empire) usually setup a Star Wars Experience at Emerald City Comic Con. This includes various props and displays presented for our guests to enjoy. We collect donations for our local children's hospital. 

Here is a video of what we presented for ECCC 2023

I have previously added electronic lights and sounds to a few of the props featured in our Star Wars Experience. I wasn't slated to build anything new for the props this year until our meeting about three weeks before the con. I was asked by the project lead for the Speeder Bike build if I could add sound to the bike. I had parts available from another build, so I agreed. 

The project lead requested a sound unit that could magnetically attach to the bikes frame. I requested the dimensions of the frame I would be working with, but he was unable to provide them. Without the dimensions to work with, I designed a unit that could be adjusted to fit. It can fit on a frame as narrow as 18cm and as wide as 30cm. 

I was able to successfully complete the project in time, though I was doing the final assembly onsite. I now have the correct dimensions of the frame and will build a unit specifically for the bike. I figure this unit might be useful for someone else in the future. Note: you can run a second speaker off this amplifier, but I was told beforehand that only one would be needed. 

The speaker base is designed to hold a 20 watt full range speaker from Adafruit. The soundboard & amp base is designed to hold a 18 watt amp on one side and a ¼ size proto board on the other. The Adafruit soundboard connects via the proto board. All the parts were designed to print on my Ender 3. Assembly hardware is a combination of M3 & M4 bolts nuts, washers, & standoffs. Electrical connections were made with various JST connecters, an RCA audio connector,  and soldering. 

Let me know if you have any questions or if I missed anything in my material list.

Full list of materials:

Adafruit:

Adafruit 16MB Soundboard

20 Watt Speaker

Adafruit ¼ Proto Board 

Female Pin Headers

10uf Electrolytic Capacitor 

0.1uf Ceramic Capacitor 

Amazon:

eSun PLA+ Gray

Kinter 18 watt Amplifier

12V Power Supply for Amp

M3 Hardware Kit

M4 Hardware Kit

Assorted Standoff Kit

Magnets

Solid Core Wire

Stranded Wire

Shrink tube

JST-SM Connector Assortment

JST-XHP Connector Assortment

USB Power Plug 

RCA Audio Plugs

Liquid Electrical Tape

Foot Switch with 3 plug extension cord

Jameco: 

5V 1 Amp USB Power Supply: (The one I am using is no longer available through this seller) They do offer a similar one linked here.

Notes: 

For crimping the JST connectors: I recommend this tool and watch this YouTube video by Teaching Tech on how to use it. He is talking about it's use for making connections on 3D Printers, but the instructions apply for general use.

For buttons: I did not source them for this project but I'll list a few options:

Option 1  Option 2  Option 3  Option 4

For the Adafruit Soundboard: Refer to this document for setup & use instructions.

This project was designed in Onshape under a maker account. Per the terms of the account, this design cannot be commercially used. To learn about using Onshape, I recommend this series by Teaching Tech.