Herringbone

You can make a very beautiful Christmas tree if you wish. And it’s unlikely that anyone else will have one like this. You can even give this device to someone. The principle of the Christmas tree is quite simple.

I will not provide you with boards, circuit diagrams, and microcontroller firmware, because I think that this design is too difficult to replicate.

But you can simply do without it by connecting it through a resistor LEDs to nutrition. You can, of course, do without a board and solder a frame of copper wire with a diameter of more than 1 mm. In general, think for yourself.

Let me introduce you to the principle of operation: The board is reinforced LEDs with a microcontroller. The microcontroller is used for smooth switching LEDs between rows and reducing attenuation during the break. In general, how do you program...

The whole thing is connected to power - a Krona type battery.

Next, all these bells and whistles are attached in any convenient way to the moving part of a 120 mm cooler from a computer.

Turn on the power on the board and apply voltage to the cooler. We admire the Christmas tree we made with our own hands!