A variety of light device (sdes), from the simplest to the most complex — widely used for the decoration of Christmas trees, holiday youth parties and even school discos. Therefore, the readers ‘ interest, the CDS continues unabated.
The proposed scheme is simple device “running lights”, published in the Italian magazine “m & e Pratica”. It is a multivibrator consisting of three interrelated stages. The opening of the transistors and the ignition is switched to their collector circuits of LEDs sequentially one after the other.