LED ball physically assembled in a matrix of dimension 20 Rays and 7 LEDs. LEDs are governed microcontroller and two decoder K155ID10. Operating current 80mA decoders, this is enough to connect the LED matrix in the dynamics of directly between the microcontroller and decoders, excluding transistors, the brightness of LEDs is sufficient. The control circuit assembled on two boards, located in the center of the ball, moving away from them rays – soldered in one line cathodes, LEDs, and the anodes are connected by layers of thin wire as a cobweb. This is the figure of the circuit;
Before installing the need to bend legs of chips at 90 degrees, solder all the details of one party to the first charge, then at the opposite conclusions to put a second charge and finish soldering. Podpayat supply wires and programming, flash microcontroller and check the output signals. Only then can continue mounting LEDs. To facilitate the work necessary to prepare a template – a hole in the cardboard (plywood, plastic) 7 holes for the LEDs on the same line two centimeters. Then bend cathodes of LEDs 90 degrees right next to their body, insert the LEDs into the template and unsolder beam deflected conclusions. Each of the 20 rays soldered into the board and turn down under the picture. To give the rigidity of the whole structure, anodes maximum distance from the center LED solder together a 10-centimeter segments of tinned copper wire, giving the correct type of construction of the dodecahedron (face-pentagon at each vertex, three edges). Then solder each layer remaining anodes of LEDs and connect each layer to the relevant conclusions resistance. With proper installation will start building a microcontroller embedded in his light effects. For a change, it automatically changes the number of repetitions, speed, brute force effects. This is enough to exclude the interference of the operator. The program is written in a medium BASCOMAVR, if desired in the source code can add or change inherent effects.
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