Introduction to the principles of wireless remote control
Nowadays, our wireless remote controls are ubiquitous in our lives, with every household using them, such as for our televisions, air conditioners, and other appliances. So, what is the basis for the functionality of wireless remote controls? Let me explain in detail.
24-10-31
Nowadays, our wireless remote controls are ubiquitous in our lives, with every household using them, such as for our televisions,air conditionersand other household appliances. So, what is the basis for the functionality of wireless remote controls? Let me explain in detail.
Wireless remote controls bring great convenience to our daily lives. The inventor of the remote control is unknown. Today's remote controls are devices that use remote control to operate machines, consisting of an integrated circuit board and buttons that emit different signals.
With the advancement of technology, the types of wireless remote controls have also increased. Generally, there are two common types: one is infrared remote control, which is widely used in household appliances, and the other is radio frequency control mode. Each type has different characteristics and usage ranges.
Infrared remote control:
is a remote control device that emits control signals based on infrared rays in the range of 0.76-1.5μm. Its system is generally divided into receiving and transmitting parts. The receiving part is mainly realized by infrared receiving diodes, which come in square and round types. When we apply reverse bias to the infrared receiving diode during use, it can operate normally. This means that during use, the infrared receiving diode is used in reverse in the circuit, which allows for higher sensitivity.
However, the emission power of infrared receiving diodes is usually very weak. Therefore, in recent years, we often use finished infrared receiving heads to enhance the weak signals received by the infrared receiving diodes and amplify the circuit.
The transmitting part is mainly an infrared light-emitting diode, which has different internal materials compared to ordinary light-emitting diodes. Therefore, when we apply appropriate voltage across its terminals, it emits infrared light instead of visible light, making it a very special diode.
Advantages of infrared remote control:
It does not affect the surrounding environment and does not interfere with other electrical devices. We can use the same remote control for household appliances in different rooms because infrared remote controls cannot penetrate walls, thus avoiding interference. Circuit debugging is simple, and usually, no debugging is required; we can use it as long as we connect the circuit correctly according to the specified connections. Encoding and decoding are simple, and multi-channel remote control is also possible, which is why infrared remote controls are widely used in our household appliances.
Radio frequency remote control:
Controls various devices from a distance using radio signals. The equipment receives these signals, allowing various corresponding machines and devices to perform their respective tasks. This type of remote control is also divided into transmitting and receiving parts.
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