How does a motion activated camera work?

When we want to choose a motion-activated camera. We may want to know:

The working theory of motion activated camera.

The Motion Activated Camera we want to suggest is A Passive Infrared Sensor (PIR sensor). We can study PIR from Wikipedia. That is an electronic sensor detects infrared (IR) light radiating from objects in the sensor’s field of view. When using this PIR sensor in the camera, that can start the camera. Once detected the object’s IR light, the sensor can get and transfer the signal to the camera and send a notification to the smartphone monitor APP.

There’s also software-based motion activated cameras detect motion by comparing pixel changes between successive frames. If a human or animal passes by, the different pixels will be counted and the software inside will trigger motion alerts.

We mainly suggest the PIR motion activated cameras, that only motivated by the human IR light radiation. And software-based one will also motivated by the asway curtain. That’s not the efficient signal we want.

How to install the motion activated camera?

People may buy the motion activated camera to install in the room, outdoors, in office, in front of a computer. After getting it. We just need to install it in the correct place.

What’s the correct place to install the motion activated camera?

  1. Avoid direct sunlight.
  2. Avoid motion activated camera face to the air conditioner or element radiator.
  3. Avoid too much vapor, high moisture place.
  4. Avoid the curtain, screen or moving object, that will block the detection field.
  5. Just put install the motion activated camera face to the correct place, that can detect the visiting guys easily.

After choosing the correct place, then we need to set a power outlet and ensure the WIFI can cover the place. After installing the PIR-motion activated camera, we then need also install the monitor app in our smartphone according to the instruction. Then we can test whether the camera and the PIR sensor all worked well.

How does a PIR motion activated camera work?

When have humans in front of the camera, the camera can detect the human emit IR light radiation. Then the computer will start work to take video and also send a notification message to the smartphone APP. In the smartphone APP, we can save the on-live video.

  • And some outdoor motion-activated camera has an audio function, have the two-way voice communication. We can scare away the intruders.
  • If the courier comes, we can instruct them to leave our file or baggage at the correct place.
  • When our children back home by themselves, The front door camera can send us the notification, the child is back home safely, and with an indoor nanny camera, we can know how what happened at home, we can also have good communication with them.

Outdoor Motion Activated Camera


Why we need the motion activated camera? People may wonder when we are outside, then how to monitor our house? There’re many devices can help to secure our house, now we suggest motion activated camera. When some intruders walk through the camera, the device will…Read More »

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Mini Camera Features: Three kinds of power supply method The photosensitive sensor can automatically adjust the day or night vision. Built-in 4pcs 960nm wavelength invisible infrared lights, night vision is clearer. 155-degree wide-angle lens supports a wide view. Multi spherical surface, visual angle up to the…Read More »

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15 thoughts on “How does a motion activated camera work?”

  1. Pingback: How to choose a motion-activated camera?

    1. Hi, Friend. The places depend on the different kinds of use occasions. If used outdoor, we suggest installing the motion-activated camera at the entrance of the house and choose a good view field. If used indoor, we have a hidden camera with a motion-activated function. It also depends on your house or office demand. Could you tell me more? Thanks.

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