Universal LG DVD Player Remote Control 52 Keys 2pcs AAA Battery

Plastic Remote Control 52 keys For LG 70UQ8050PSB / LG 75UQ8050PSB / LG 55UP7720PTY TV

There are many special chips for remote control transmitters, which can be divided into two categories according to the coding format. Here, we will describe the type that is widely used and easy to decode. Now, we will take the transmission circuit composed of upd6121g of NEC of Japan as an example to explain the coding principle (this coding method is used for DVDs, VCDs and audio systems in general households). When the transmitter key is pressed, the remote control code will be sent out. The remote control code will be different according to the pressed key