3、过红外收发头进行数据传输。关键词:单片机 红外遥控 LED 键盘控制44北京化工大学北方学院毕业设计(论文)TheDesignOfInfraredEmittingandReceivingCircuitAbstractAlongwiththerapiddevelopmentofthecommunicationsindustryandInternetofThings,thetelephonehasspreadtomillionsofhouseholds,theuseofthetelephoneremotecontroltechnologyhasalsomadecer