THIS REPO IS STILL A WIP. APOLOGIES IF YOU SEE THIS BEFORE ITS COMPLETION.
The BongoCon is a simple and inexpensive to assemble DIY alternative to Nintendo's DK Bongo controller for the Donkey Konga series of games as well as Donkey Kong: Jungle Beat. The design of this controller will remain totally open source to allow for future upgrades and revisions under the Creative Commons Attribution Non-Commercial 4 license.
The following are AliExpress affiliate links that help to support my continued ability to create garbage like this!
Piezo Disk Module (2 required): https://s.click.aliexpress.com/e/_oEtCCIz
Microphone Module: https://s.click.aliexpress.com/e/_oCc4FEZ
Kailh Choc Keyswitch (Brown): https://s.click.aliexpress.com/e/_oFTdXgz
Raspberry Pi Pico (2040): https://s.click.aliexpress.com/e/_ooCzJ1P
Micro USB Breakout: https://s.click.aliexpress.com/e/_oFXrpVR
Female USB-C Breakout: https://s.click.aliexpress.com/e/_op5vEjB
Vibration Isolation Mounts: https://s.click.aliexpress.com/e/_oDr60u1
M3 Hardware: https://s.click.aliexpress.com/e/_oFzqwxP
M3 Brass Insert (Amazon Only): https://tinyurl.com/5xbdae37
Drum Head Rubber (Amazon Only): https://tinyurl.com/bdenswb9
All STLs have been adjusted so that they should import into your slicer in their optimal orientation. I suggest printing these files in PLA with %30 infill and 4 walls to ensure that they are sturdy enough to beat on. Depending on your printer it may be worthwhile to enable brims to prevent warping and auto-generated tree supports to ensure clean overhangs.
Prepare the drum halves by applying a light coat of quick cure epoxy resin (or super glue) to the indicated areas. Carefully slide the center body into position over both drum halves and secure them until the adhesive cures.
Now that the body is a single unit you can begin by carefully inserting brass inserts into the indicated holes using your soldering iron. Be careful to ensure that they are inserted flush and level.
Solder an appropriate length of wire to the pins of the piezo modules and insert one into each recess at the bottom of each drum half with a mm M3 screw. Feed the wires through the opening into the main body of the drum.
On the underside of each drum head insert the piezo disks into their matching recess with the wires oriented to guarantee connection to the modules inside the drum. Secure them using a bead of hot glue around the edge of the sensor.