Test report of Infrared emitting and receiving
First:The principle of infrared, infrared remote control has been widely used in home appliances and industrial control system,
need realize one important thing that work principle and performance, also is not difficult.

*Characteristic of  infrared :eye can see the visible light wavelength,
arranging wavelength in color sequence;  red, orange, yellow, green, cyan, blue, purple, respectively The red light in the wavelength range as 0.62μm ~ 0.76μm, more longer than the red wavelength light is infrared. The infrared ray To exhibit similarity with ir led strips.

*Application: Infrared remote control is the use of 0.76μ m～1.5μ m  wavelength(near infrared)to transmit a control signal. feature of Infrared is that it does not interfere with other electrical equipment work, it will not affect the surrounding environment. Circuit is simple,
coding for transmitted signal can realize the function of multi-channel infrared remote control.Secode: divide the infrared remote control system into receive model and emitting model. The emission component parts as infrared emitting diode, the emits infrared as visible light, Common infrared infrared wavelengths emitted from the light emitting diode is about 940nm,the shape is the same with φ 5 mm light emitting diode, but different colours. In general there are transparent, black and dark blue three type.