Switch for three garlands. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Switch for three garlands. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Color and music installations, garlands

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The switch for three garlands can be assembled according to a simple scheme.

(click to enlarge)

Some time after the device is connected to the network, one of the cells will work, for example, on a V6 trinistor. The garland H3 will light up, the capacitor C3 will be discharged (through the resistor R6 and the trinistor V5). Capacitor C2 will continue to charge, and after a while the trinistor V3 will open. Garland H2 will light up, and H3 will go out, i.e. the garlands will light up one by one. If the garland lamps are arranged in a row so that they alternate (the lamp of the first garland, the lamp of the second garland, the lamp of the third garland, the lamp of the first garland again, etc.), you can get the effect of "running lights". The current of each garland is up to 0,4 A.

If the garlands are designed for a higher current, a V7 diode of the D342 type should be installed, and the trinistors should be replaced with KU202L (M, I).

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