Abstract
In recent years, with rapid economic development and scientific and technological advances, people's standard of living has been greatly improved. Air-conditioning, TV, refrigerators, washing machines, microwave ovens and other common household appliances as overwhelming already entered the home of ordinary people. These appliances with technological advances, the quality and performance improvement has not stopped. However, the requirements of the appliances are not limited to, simple easy-to-use is a goal pursued. Therefore, when in the sales of these appliances are usually attached to a corresponding remote control, such as air-conditioning remote control, TV remote control and so on. The design is to modern people's higher home appliances are designed to meet the requirements of automatic remote control air-conditioning.
At present, the remote control is commonly used infrared technology. The use of the technology 850nm infrared light transmission of voice and data, to achieve the simple point-to-point data transfer and file synchronization. However, the infrared technology also has its inherent shortcomings. For example, it requires equipment must be accessible between the straight-line channel, and the communication range of small, poor penetration, the number of small devices such as infrared remote control is therefore not very satisfactory.
Voice-activated remote control is even more obvious shortcomings, it is usually the voice of the general requirements for acceptance are more acute, thus easy to mistake, it is not ideal.
Bluetooth technology is another alternative approach, which has low power consumption, simple operation, communication distance, the number of support equipment, and do not have the advantages of open channel. However, the shortcomings of Bluetooth technology is obvious. First of all, the high complexity of Bluetooth technology, the Bluetooth hardware design, software programming and its agreement not only complex and expensive; Secondly, the higher the price of Bluetooth chips.
However, in order to reduce costs without affecting the design, so in the design of the remote control is still used infrared technology. It has a simple structure, the technical complexity of the system of small, low cost, good orientation and information safe and available frequency resources, etc..
The design includes hardware and software design in two parts. Hardware, including the design of infrared transmitter module, CPU 89S51 module and its peripheral circuit design, LED display, keyboard, Human-Computer Interaction module design, temperature and humidity sensor module design. Some of the major software, including temperature and humidity testing and configuration, the shutdown time set.
Key words: microcontroller, temperature and humidity sensors, infrared emission
