HC-SR501 Adjustable PIR Module for Arduino Motion Sensor Human Body Induction Detector
Features:1. Automatic induction: When someone enters its induction limits, enter the high level, people leave the sensor range is automatically delayed off high. Output low.2. photosensitive control (optional): the module reserved for location, can be set to photosensitive control, strong light during the day or not induction. Photosensitive control is optional, the factory did not install the photosensitive resistor. If necessary, please buy a separate photosensitive resistor to install.3. Two trigger modes: L is not repeatable, H is repeatable. Can be jumper selected, the default is H.A. non-repeatable trigger mode: the induction output high, the delay time is over, the output will automatically change from high to low.B. Repeated trigger mode: that is, after sensing the output high, in the delay time period, if the human body in its sensing limits of activities, its output will remain high until the delay after the person will leave the high The level changes to low level (the sensing module automatically delays a delay time after every activity of the human body, and takes the time of the last activity as the starting point of the delay time).4. Induction blocking time (default setting: 3-4 seconds): After each sensing output (high level goes low), the sensing module can be followed by a blocking time, during which it is sensed The device does not receive any sense signals. This function can be used to achieve the interval between the sensing output time and the blocking time. It can be applied to the interval detection products. At the same time, this function can effectively suppress all kinds of interference in the process of load switching.5. Wide operating voltage: the default operating voltage DC5V to 20V.6. Micro-power: Quiescent current 65 microamps, especially for dry battery-powered electrical products.7. Output high-level signal: can be easily with various types of circuits to achieve docking.Instructions for use:1. Induction module power about one minute after the initialization time, at this time the module will output 0-3 times a minute, a minute into the standby state.2. Light and other interference should be avoided Directly close the surface of the lens module, so as not to introduce interference with the signal to produce malfunction; use of the environment as far as possible to avoidFree flow of wind, the wind will cause interference to the sensor.3. Sensor module with dual-element probe, the probe window is rectangular, dual element (A yuan B yuan) in the longer direction at both ends, when the body from left to rightOr from right to left through the infrared spectrum to the dual time, distance difference, the greater the difference, the more sensitive induction, when the body from the front to the probeHead or from top to bottom or from bottom to top direction, the dual element can not detect infrared spectral distance changes, no difference, so the sensor insensitive or does not work; so the sensor should be installed so that the direction of the probe dual And the direction of human activity as much as possible parallel to ensure that the body has been throughProbe dual-element induction. In order to increase the sensing angle limits, this module uses a circular lens, also makes the probe four sides are sensitive, but the left and right sides are stillHowever, compared with the upper and lower direction of the two induction limits, sensitivity, installation must still try to according to the above requirements.

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