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许多红外遥控电路都是采用编码或计数方式进行工作的。使用时,需要多次按动发射器的按键或按多个按键,才能选到所需通道。下面介绍的红外遥控电路,用音调解码器LM567作为选频解调单元,在使用时,只要按发射器的某一个按键,即可选到所需的通道。一、工作原理
Many infrared remote control circuits are using coding or counting method to work. Use, you need to press the transmitter button or press the button several times in order to select the desired channel. The following describes the infrared remote control circuit, with tone decoder LM567 as the frequency selection demodulation unit, in use, simply press one of the transmitter button, you can select the desired channel. First, the working principle