具有非常低的功耗的自校准接近开关 NXP capacitive proximity switch PCF8883 Self-calibrating proximity switch with very low power consumption This low-power switch uses a proprietary digital method to detect changes in capacitance on a remote sensing plate. Self-calibration makes it insensitive to most contaminants. Key features Applications } Dynamic proximity switch } Proximity detection } Digital processing method } Sanitary applications: electric hand dryer and towel } Adjustable sensitivity, can be made very high dispenser } Adjustable response time ……