Traditional Chinese Practical "Peacock: Circuit Design, Parts List & Workshop Prototype Guide

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"Peacock in full bloom" musical lanternsMusical lanterns are commonly seen in dance halls, clubs, etc., but are rarely seen in homes. First, they consume a lot of electricity, and secondly, they cost more and take up space. The "Peacock Spreading Its Tail" music lantern now introduced has fewer components, is easy to install, has low cost and consumes little power. The lantern area can be large or small, making it very suitable for home installation and use. Because the lanterns are arranged in the shape of a "peacock spreading its tail", with the pitch of the tone, the lanterns expand and contract alternately from the center to the surroundings. The flowing water overflows with colors, complementing each other, complementing the beautiful and melodious music, and bringing beautiful enjoyment to people's lives.1． How the circuit worksThe circuit of the "Peacock Spreading Its Tail" musical lantern is shown in Figure 47-1. Figure 47-1The control signal of the music lantern is the audio signal output from the audio equipment such as radio recorder, karaoke or amplifier. It is added to the primary stage of transformer B1 through plug CZ. The audio signal boosted by B1 is sent to the two-frequency divider through the potentiometer W for frequency division. After frequency division, the low-frequency signal is added to the control electrode of the triac SCR1, and the high-frequency signal is added to the control electrode of the triac SCR2 to control the conduction angles of the two thyristors respectively, so that the lantern can be changed with the change of high and low tones.ZD is a low-voltage small light bulb, which is connected to the secondary of step-down transformer B2. Among them, ZD1 uses 1 to 3 small light bulbs in parallel, ZD2 uses 10 small light bulbs in parallel, and ZD3 uses 16 small light bulbs in parallel. Then connect the ZD1, ZD2, and ZD3 lamp groups together in series. Since the total resistance of ZD3 < the total resistance of ZD2 < the total resistance of ZD1, when the music is interrupted or the music signal is weak, neither SCR1 nor SCR2 is conductive. Most of the secondary voltage of B2 drops at both ends of ZD1, causing ZD1 to emit light close to normal brightness, while the ZD2 and ZD3 lamp groups are not on.When there is a low-frequency music signal output, the bidirectional thyristor SCR1 is triggered to conduct, causing the ZD1 lamp group to short-circuit and not light up. Since the resistance of the ZD2 lamp group is larger than that of the ZD3 lamp group, most of the secondary voltage of B2 drops on ZD2, causing the ZD2 lamp group to illuminate, while the ZD3 lamp group does not light up. When there is a high-frequency signal in the output music, the bidirectional thyristor SCR2 is triggered to conduct, the ZD1 and ZD2 lamp groups are short-circuited and do not light up, and the ZD3 lamp group emits normal light. As a result, with the ups and downs of the music, the lanterns open and close like a peacock, which is very spectacular. …

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