Running lights. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Beginner radio amateur
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A variety of light-dynamic devices (SDU) - from the simplest to the most complex - are widely used to decorate Christmas trees, festive youth evenings and even school discos. Therefore, readers' interest in the CDS does not weaken.
We offer a diagram of the simplest device "running lights", printed in the Italian magazine "Electronics Practice". It is a multivibrator consisting of three interconnected stages. The opening of transistors and the ignition of the LEDs included in their collector circuits occur sequentially one after another.
Schematic diagram of the device "running lights"
In the manufacture of an automatic switching device, it is necessary to select transistors with the highest possible current gain, and capacitors with minimal leakage.
Of the domestic elements, transistors of the KT3102 and KT342 series, LEDs of any brand are most suitable for replacement.
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