Here is the product being powered on and switched to demo mode in which it displays all available running modes in sequence. There are additional videos also at the 7th step of the article.
Below is a video of all 4 prototypes singing together.
Step 1: Circuit Design
it has 30 different modes, 14 continuous lighting with different power settings, 12 animations, 1 temperature measuring,1 timing modes and two audio modes
I started designing it on a simulation program first then made the real circuit on breadboards
Step 2: Deciding on the Design
Later I've worked on the design of the product itself. Made some 20+ sketches before starting to 3d model.
The blue one was my first model, on the sketch it was nice but I didn't like the looks of the model then tried the black one and went on trying, at last I've settled on the gray coloured design. Being long and slender with a small volume can be helpful for the product to be used for multi prposes.
Step 3: First Prototype
installed the circuit into the printed plastic case and started testing.
While working I continusly updated and improved the code with new ideas coming. Showing temperature was one of them. Drilled a hole at the bottom of the printed case to install the 18B20 temperature sensor. Later I have added a hole to the 3D model as well.
Step 4: Second Prototype
first two protoype torches were built on prototyping board instead of pcb.
Step 5: Printed Circuit Board Design
Step 6: Third Prototype
With the third prototype, I have added some animations and functions to the design, here is the complete demo mode .
Step 7: Audio Amplifier
Sound input is sampled over an analog input of the pic 16f88 controller.
I have found and used a one transistor microphone amplifier from the net to amplify the condenser microphone signal to microprocessor voltage levels.
and the audio-animation result is something like this, the singing smiley.
This is the vumeter mode
and some of the animations and lighting modes of version 2 can be seen on this video
The code and the product details are %99 complete not much to change but there is still possibility for some mistakes to be found and corrected so to download the latest versions of hex and stl files, please give a visit to the dot matrix torch article on www.endtas.com
Step 8: Accesories & Contribution
And finally you need to have a charger to run this thing. So I have converted a cellphone charger by modifying its socket to fit the torch's, added a led as a power display.
I am looking for a backer to further improve and sell this product and my other products. If you are that backer then contact me..
If you want to contribute to my project here is the link. I'm giving away matrix prototypes to contributors.
You can see some of my other designs on www.endtas.com and articles on www.ozkalozsoy.com
STL file for this product's case is online now and can be downloaded. The pcb design, hex code etc will be online in a short time.
if you need similar product designs for commercial purposes, I can help.
Have fun and don't forget to rate and comment. Thanks.