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Homemade PC infrared interface (Irda)

2013-09-29
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Homemade PC infrared interface (Irda) Infrared communication is a cheap, short-distance, wire-free, low-power and highly confidential communication solution. It is mainly used in wireless data transmission in PCs, but has gradually begun to be used in wireless network access and short-distance remote control of home appliances. In view of the many benefits of infrared communication, almost all motherboards now provide infrared interfaces so that users can use them to communicate with devices with infrared interfaces, such as laptops, printers, modems, PDAs, mobile phones, etc. However, the computer motherboard only provides an infrared interface and does not provide a complete transmitting and receiving device, so when users want to use infrared communication, they still need to buy infrared connectors. There are currently few commercial connectors on the market. Here are three DIY solutions for your reference. 1. Motherboard infrared interface The infrared interface on the motherboard is mostly a 5-pin socket, and its pin definitions are as follows: 1. IRTX (Infrared Transmit); 2. GND (power ground); 3. IRRX (Infrared Receive); 4. NC (undefined); 5. VCC (power positive pole). According to the \"Asynchronous Serial Communication Standard\" provided by IRDA (Infrared Data Association), the IRTX pin can provide an output current of >6.0mA, while the IRRX pin can absorb >6.0mA.

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