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“Analog synthesizers are very cool, but also quite difficult to make. So I wanted to make one as simple as it can get, so its functioning can be easily understandable. For it to work, you need a few basic sub-circuits …
“In this instructable, we made a battery powered RGB LED cube. It automatically shifts through colours with the help of a built in microcontroler. The bottom half of the cube is laser cut and the top half is 3D printed …
“Did you have problems winding the toroidal transformer of a regular joule thief? If so then this instructable is for you! And if not it is also an interesting circuit to see. In this instructable I will show you how …