Household Remote Control 9 Keys Infrared For Ceiling Fan / Clean Robot/ Kitchen Light
Infrared is the cheapest way to remotely control equipment in the visible range. It has the characteristics of strong anti-interference ability, simple circuit, easy coding / decoding, low power consumption and low cost. Almost all audio, video and other household appliances in our life can be controlled in this way. Due to the wide use of infrared remote control, the corresponding components are quite cheap and easy to obtain, Thus, it is used by amateurs and makers of electronic products to control their own projects, and it is also widely used in embedded system learning and practical projects
Infrared light is actually ordinary light with a specific color, with a wavelength in the range of 760 ~ 1500 nm, which is lower than our visible spectrum, so we can't see this color with the naked eye. This is one of the reasons why we choose infrared light for remote control. We want to use it, but we are not interested in seeing it; Another reason is that infrared light emitting diodes are very easy to manufacture and very cheap. Although we humans cannot see the infrared light emitted by the remote controller, this does not mean that we cannot make it visible