Infrared remote controls have been widely used in color televisions, sound devices, and various electrical products. The control interval of the remote control can usually be between 6-8 meters, making it particularly convenient for application. Due to the extensive use of infrared remote control methods, their infrared emission and reception circuits are equipped with complete supporting devices. These devices are not only cheap but also reliable, and the circuit is extremely simple. Electronic enthusiasts are able to use these devices to assemble a variety of useful remote controls, which not only applies but also enhances the interest in manufacturing.

Infrared LED BeadsCharacteristics of

Infrared light is invisible and cannot be detected by the human eye. The common infrared LED lamp beads have a similar appearance to ordinary LED lamp beads. Reducing the pulse duty cycle can also greatly increase the emission interval of low-power infrared light-emitting diodes. The common infrared light emitting diodes are divided into three categories of power: low power (1mW~10mW), medium power (20mW~50mW), and high power (50mW~100mW or above). When applying infrared light-emitting diodes of different powers, corresponding power driving tubes should be equipped. To make infrared light-emitting diodes form modulated light, only a certain frequency pulse voltage needs to be applied to the driving tube.

When using infrared light-emitting diodes to emit infrared to control a controlled installation, there are corresponding infrared photoelectric conversion components in the controlled installation, such as infrared receiving diodes, photoelectric transistors, etc.

There are two methods for infrared emission and reception, one is direct reflection, and the other is reflection. Direct beam type refers to the placement of the light emitting tube and the receiving tube at opposite ends of the emitting and controlled object, with a certain distance between them; Reflective type refers to the light emitting tube and the receiving tube being placed side by side. Normally, the receiving tube has no light and only operates when the infrared light emitted by the light emitting tube encounters the reflector and the receiving tube receives the reflected infrared light.