HC-SR501 human infrared sensor ( blue plate)

Blue Plate HC-SR501 HCSR501 SR501 Human Infrared Sensor Module Pyroelectric Infrared Sensor Imports Probe for arduino

SKU: SLY3730 Category: INFRADE AND ULTRASONIC SENSOR

Product Description

Features:

1. Automatic induction: When someone enters its induction range, enter the high level, people who step out of the sensor range are automatically delayed high. Low output.

2. Photosensitive control (optional): the module reserved for location, can be set to photosensitive control, strong light during the day or no induction. The photosensitive control is optional, the factory did not install a photosensitive resistor. If necessary, please purchase a separate photosensitive resistor to install.

3. Two trigger modes: L is non-repeatable, H is repeatable. Can be selected by jumper, default is H.

A. Non-repeatable trigger mode: induction output is high, the delay time is over, the output will automatically change from high to low.

B. Repeated trigger mode: that is, after detecting the high output, in the delay period, if the human body in its detection activity range, its output will remain high until the delay after the person leaves the top, the level goes to the bottom (The detection module automatically delays a delay time after each 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 detection output (high level becomes low), the detection module can be followed by a blocking time, during which it is detected, the device does not receive any sensory signal. This function can be used to achieve the interval between detection output time and blocking time. It can be applied to interval detection products. At the same time, this function can effectively suppress all kinds of interference in the load switching process.

5. Wide operating voltage range: the default operating voltage DC5V to 20V

6. Micro-power: quiescent current 65 microamps, especially for dry battery electric products.

7. High-level signal output: can be easily with different types of circuits to achieve docking.

Manual:

1 induction module energized about one minute after the initialization time, at this time the module will output 0-3 times per minute, one minute in the standby state.

2. Light and other interference should be avoided by directly closing the surface of the lens module, so as not to introduce signal interference to produce improper operation; Use the environment as much as possible to avoid

Free flow of wind, the wind will cause interference with the sensor.

3. sensor module with double element probe, the probe window is rectangular, double element (A yuan B yuan) in the longer direction at both ends, when the body from left to right

Or right to left through the infrared spectrum to achieve double time, the distance difference, the greater the difference, the more sensitive the induction, when the body from the front to the probe

Head or top to bottom or bottom to top, the dual element can not detect infrared spectrum distance changes, no difference, so the sensor is insensitive or not Works; The sensor should therefore be installed so that the direction of the dual probe and the direction of human activity are as parallel as possible to ensure that the body has been through

Dual element induction probe. In order to increase the detection angle range, this module uses a circular lens, also makes the probe sensitive to four sides, but the left and right sides are still

However, with respect to the upper and lower direction of the two induction ranges, the sensitivity, the installation still needs to try according to the above requirements.

Use should pay attention to the following points:

1. The DC voltage must meet our requirements, too high and too low will affect the performance of the module, but also requires the power supply to be a good filter regulator, such as computer USB power supply, charger power supply from mobile phone, the old 9V stacked battery can not meet the module work requirements, It is recommended that customers use the power transformer and regulator through the three-terminal voltage regulator, then through the power supply capacitor of 220UF and 0.1UF.

2. Although the human body is not in front of the module, but the human body of the module is too close to the module can also be caused by the sensor output, in addition to debugging, the human body does not touch the circuit part will also affect the operation of the module, A more scientific approach is to take out an LED or a multimeter, the module covered with a newspaper, people walk out of the room, so 2 minutes to see whether the module Has been or has an output?

3. The module does not take the load to work properly, connected to the load after chaos work, one reason is the power capacity is very low load power consumption, load caused by voltage fluctuations caused by the module malfunction, The other reason is the load the power will have interference in the work, such as relays or electromagnets and other inductive loads will produce reverse electromotive force, the 315M emission plate will have radiation electromagnetic and other work will affect the module. The solution is as follows: A, the power supply part of the inductor filter. B, using the load and the module using different voltage methods, such as: load using 24V working voltage, the module uses 12V working voltage, during which the use of three-terminal regulator isolation. C: Use a larger capacity power supply.

4. The human body sensor module can only work indoors, and the working environment should avoid the sun, strong direct light exposure, if the working environment has strong RF interference, you can use protective measures. In case of strong air interference, close doors and windows or avoid convection. The induction zone to avoid facing heaters and objects as well as debris and easy-to-wrap clothing.

5. It is recommended to install the human body sensor module in a sealed box, otherwise there may be the output signal.

6. If the detection angle of the body sensor module is less than 90 degrees, you can use opaque tape to cut the lens or cut the lens to achieve this.

7. The human body sensor module with dual element probe, the movement direction of the hands and feet and the head of the body and the sensitivity of the sensor are closely related, and the infrared module determines the characteristics of the sensor can only not accurately control the distance.

8. The sensor module (PIR) can be mounted on the other side of the circuit board. The probe can also be extended with a two-core shielded cable, the length should also be less than 20cm.