小型電子聲光禮花器設(shè)計(jì)方案-資料下載頁
2025-05-14 23:51本頁面
【正文】 ome interesting places such as the electronic product. Small electronic sound and light fireworks essence is to issue a squarewave oscillation signal with an oscillation circuit triggered analog fireworks color lightemitting circuit and analog fireworks explosion sounder circuit manner, not only the application in the electronic sound and light fireworks circuit, in other also very mon circuit applications, such as analog phone ringing circuit, simple hypnosis, DC motor speed control circuit doorbell circuit. Small electronic sound and light fireworks ceremony fireworks pared with the environmental, safety, suitable for indoors, etc., is not the kind of feeling like a falling meteor shower when the ceremony fireworks discharge circuit plexity and difficult to repair. Before talking about the small electronic sound and light fireworks, first familiarize yourself with the timebase integrated circuit 555 oscillation circuit 555 IC is a timer application, so called the 555 timer or 555. But later developed it in addition to timing delay control, can also be used for dimming, thermostats, pressure regulator, governor variety of control and measurement testing. In addition, it is also can be posed of the pulse oscillation, monostable, bistable, and the pulse modulation circuit for the AC signal source, power conversion, frequency conversion, pulse modulation. It is reliable, easy to use, inexpensive, is widely used in a variety of electronic products, dozens of ponents, IC 555 internal divider, parator, basic RS flipflop, the discharge tube, and buffer , etc., the circuit is more plex, is a mixture of analog circuits and digital circuits, as shown in Figure 1. 555 IC 8pin package, dual inline type, shown in Figure 2 (A) as shown by the arrangement of the input and output can be viewed as shown in Figure 2 (B) shown. 6 feet, said threshold end (TH), on the input of the parator。 2 feet, said trigger end (TR) is the input of the parator。 3 feet output end (Vo), O and two states , from the input terminal of the added level determination。 7 feet is the discharge end (DIS), it is the output of the internal discharge tube, the two states of the left floating, and the ground, is also determined by the state of the input。 4 feet is reset terminal (MR ), together with the low level of the output is low。 5 feet is to control voltage end (Vc), it can be used to change the upper and lower trigger level value。 8pin power supply terminal, pin 1 is the ground terminal. Can produce a regular pulse current or voltage of the circuit is called an oscillation circuit, time base integrated circuit 555 the oscillation circuit is able to meet this condition of the circuit。 in decimal IC counter IC3 bidirectional analog switch integrated circuit CD4066, and RC differentiating circuit, transistor, the light emitting diode posed of analog fireworks color light emitting circuit. Between them through the interaction of the oscillation signal, a pulse signal, the output signal conduction to light emitting diode.Small, lightweight and environmentally friendly features, electronic sound and light fireworks are widely used in family celebrations, gatherings of friends, Gala, children39。s toys and some interesting places, today39。s electronic information industry, the rapid development of an indispensable electronic products. Sale on the market of electronic sound and light fireworks around all kinds of integrated circuits, integrated chip, highfrequency oscillation circuit between the control role of hightech electronic technology, microcontrollerbased design simulation fireworks discharge.30
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