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.
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.