Current sensors can measure various types of current, from DC to tens of kilohertz of AC, based on the principle of Hall effect. Where IS-secondary current; IP—primary current; NP—the number of turns of the primary side coil; NS—the number of turns of the secondary side coil; NP/NS—the turns ratio, generally takes NP=1. Many people do not know what kind of cameras are invisible cameras, and do not know how to distinguish invisible cameras, so here is how to distinguish invisible cameras. Camera Pen,the memory reaches 32G,easy to carry camera,Hidden Camera HD1080p,Hidden Camera HD720P Jingjiang Gisen Technology Co.,Ltd , https://www.gisengroup.com
When the primary side wire passes through the current sensor, the primary side current IP will generate a magnetic field line, and the primary side magnetic line is concentrated around the magnetic core air gap, and the Hall piece built in the magnetic core air gap can be proportional to the primary side magnetic line. The induced voltage is only a few millivolts in size, and this tiny signal can be converted into the secondary current IS by subsequent electronic circuits, and the following relationship exists: IS* NS= IP*NP
Invisibility, as the name suggests, means that it is not easy to be seen or found, so where do such cameras exist? In fact, invisible things are hidden by the external environment, so they will not be discovered. Such invisible cameras are generally hidden in things that are more difficult to see, such as: inside the socket, inside the TV, inside the stereo, inside the fan, etc. Cameras can be hidden in various household appliances. Why should they be hidden in electrical equipment? The main reason is that these equipments have power supply and will not be used because the camera cannot be powered.