I wanted to create a special birthday present for my girlfriend, whom had no speaker system. I decided a battery powered Bluetooth speaker would be neat, and having just learnt use of the laser cutter I came up with a layered design.
The internals consist of a 2x15W RMS digital amp, 2x15W 80 cones, a Bluetooth module, 1800mAh NiMH battery and a basic fast charger – plus a few voltage regulators to bring everything together. It’s all wired so that you can charge while plugged in and still play, and turn the Bluetooth on and off. Finally it’s all insulated with sheep’s wool I had left from doing my van. I found the insulation helped reduce reverberation (probably due to the thin layers) that muddied the mid-ranges. One thing I like about it is that the front and back can be easily changed: the front grill pattern to change the look and the rear could be tuned to include a bass port for better bass response.
iPhone plugged into jack
The back labeled up with inputs/switches and charging light
Special happy birthday edition!
In the wild!
Can be stood up too
Mk.2 has a latching button for bluetooth and better internals. It’s also made from 3mm ply, rather than 6mm.
For my friends Trevor and Sarah, I created this illustration to engrave on the back.
Mk.3 is much tidier
With an oak stain
Latest revision back panel
I fairly pleased with the result and might start producing them if there is enough interest.
I wanted a place to mount my phone, to use for navigation, a bluetooth music player and handsfree in my Audi TT. The sloping windscreen makes it impossible to mount anything and the curved dashboard makes it difficult there too. Plus I wanted something neat, not a naff eBay mount and also an excuse to toy around in SketchUp.
My sister wanted a wine bottle light, like she spotted on the internet somewhere. It’s not really a chandelier, I gave it my own twist. The bottles have been sprayed with frosting, and are lit with 5050 LED RGB strip; allowing for any colour light.
The second semester of the third year of my Mechanical Engineering degree was a group design project. My group of six was tasked with the design of a coastal autonomous underwater vehicle (AUV). I was assigned design of the gliding sub-system (a long-range AUV it had to optimise energy use) and was also the business manager (as part of the project we were required to develop a business plan).