Production of an adjustable sound and light controlled lamp head

Abstract: In view of the "ever-burning lamp" in some homes or places, an adjustable sound and light control lamp head is made to promote energy saving without modifying the original circuit. Considering the convenience of use and the needs of different users, the sound and light control lamp head is designed with bayonet and screw conversion and light intensity and sound intensity sensing adjustment device, which has humanized and modular characteristics.

0 Introduction

With the continuous development of electronic technology, public place lighting control technology is also constantly updated. Now there are sound and light control, microwave induction and thermal release far infrared induction control technology, etc. The sound and light control energy-saving technology is widely used. New buildings are designed and installed with special lamp holders, but in rural or backward areas, when building houses, there is no design and installation of sound and light control switch devices, but ordinary control switches are directly used. Many families have "ever-burning lamps", resulting in electricity waste and unnecessary household expenses. Therefore, according to different places and different lighting requirements, without changing the original circuit, installing adjustable sound and light control (card/screw port convertible) lamp holders can greatly save energy and reduce costs, which meets the needs of the development of an energy-saving society.

1 Design Concept

The overall circuit is composed of sound control, light control circuit, sound and light control circuit, switch circuit, delay circuit, load circuit and power supply circuit, as shown in Figure 1.

When working, the light control circuit and the sound control circuit input signals to the sound and light control circuit together, and the sound and light control circuit transmits the signal downward and sends the signal to the switch circuit to open the switch, and also prompts the delay circuit to start working. The power supply of the circuit is provided by the power supply after the bridge rectifier and the step-down circuit. The sound and light control circuit is realized by using the light-sensitive characteristics of the photoresistor and the switching characteristics of the switch tube, that is, during the day or when the light is bright, the control light is not on, and at night or when the light is dark, the control light is on, and there is also a delay circuit to achieve the purpose of delayed lighting. The sound control and light control are controlled at the same time, so there is another circuit to control. When there is light, this control circuit is blocked and the signal is no longer transmitted downward, that is, the light will not light up. Only when the light is dark enough and there is sound, this control circuit will work and transmit the signal to the next circuit, and the light will light up. This circuit can be realized by triodes or 4000 series digital integration. For the purpose of simplicity and stability, digital integrated circuits are selected here to realize it. In addition, in order to meet the needs of different regions and users, an adjustable device is added to the circuit, so that users can turn on and off different light intensities or different sound intensities by adjusting the device.

2 Design Principles

2.1 Circuit Working Principle

The circuit schematic is shown in Figure 2. The 220 V mains electricity is connected to the half-wave rectifier circuit composed of DS, and the output voltage is used by the entire system. RW is an adjustable resistor with a resistance of 1 MΩ, which is connected in series with R9 to realize an adjustable light measurement circuit; during the day, R9 is exposed to light and the resistance is about ten kΩ, the input pin of U1 is at a low level, the output pin outputs a high level, and D1 is turned on; if one pin of U4 is at a high level, the output pin of U4 outputs a low level, so that the thyristor D7 has no trigger level and is cut off, so that DS has no circuit and does not light up.

When the light gets darker at night, the resistance of photoresistor R9 increases (about 1 MΩ), making the input pin of U1 high level, and the output pin outputs low level, making D1 reverse cutoff. One end of U4 input is equivalent to empty pin (high level), and the output pin outputs low level. D7 has no trigger level, and the bulb has no circuit and still does not light up. According to different seasons and user needs, the resistance of RW can be adjusted to achieve use under different light intensities.

When footsteps or sound signals arrive, R10 will generate a signal level, which is coupled to the input pin of U3 through C1 (both pins are high at this time), and the output pin outputs a low level. Then one input pin of U4 is low level. Since the input pin of U2 is connected to the ground through R6 and is low level at this time, the output pin outputs a high level. The other input pin of U4 is high level, so the output pin outputs a high level, D7 gets enough trigger level and turns on; the loop is formed and the bulb turns on and lights up. The sound signal is an instantaneous signal. An electrolytic capacitor C4 is connected between U2 and U4. When U4 outputs a high level, it also charges C4, making the voltage of U2 lower. The voltage across the capacitor cannot change suddenly. At this time, C4 is discharged through R7 and D7. When the level cannot meet the trigger level of the thyristor, D7 is cut off and the circuit of the bulb is disconnected, and the bulb goes out. Only when the sound signal arrives again, the above action is repeated and the bulb lights up again.

2.2 Appearance Design

In order to facilitate the use of bayonet or screw-in bulbs on the market, a bayonet-screw-in conversion device is specially designed as shown in Figure 3. Figure 4 shows the sound and light control lamp holder, which can be directly rotated into the screw-in lamp cap. Figure 5 is the complete work of the entire production. After debugging, it can fully achieve the original design goal. This lamp holder is a conversion lamp holder. When installing, no additional wiring or circuit modification is required. You only need to transfer the interface to the ordinary bayonet or screw-in lamp holder. All bulbs on the market can be used. There is no need to consider the bayonet or screw-in. Connect the bulb below to realize the sound and light control function. It is very convenient to use.

3 Conclusion

The invention relates to a new type of lamp holder with screw-on conversion and sound and light technology control. The key technology and appearance design of the lamp holder can realize the convenience of "buy and use immediately". In addition, taking into account the different time and regions used, a manual adjustment photometric device is provided on the basis of the lamp holder to facilitate the user's adjustment and use. The lamp holder device makes it easier to integrate the sound and light control technology into the energy-saving technology. Compared with the traditional sound and light control device, the conversion lamp holder has the characteristics of humanization and modularization. In addition, according to the different regions of use or user needs, the set values ​​of the light metering and sound pickup sensing circuits can be adjusted arbitrarily to achieve the best energy-saving effect. Therefore, the lamp holder has great development space and market prospects.