One of the simplest audio and video surveillance systems requires the following hardware devices
Pickup + network camera + switch + NVR (PC host) + output device and power supply (accessory) etc.
hardware
Pickup
Common three-wire pickups on the market
Red, white, and black lines represent power, audio, and public ground (negative), respectively.
2. pickup power supply
There are two kinds of pickup power supply, dedicated power supply and common linear power supply
3. Network Camera
A common Kang network camera
Common webcam with audio
Connection
1. Audio and video system composed of a microphone and a network camera
Connect the microphones to the 1 (red line power supply positive), 2 (white line audio positive), and 3 (black line common ground) ports of the professional power supply for audio input and microphone pickup. It is output from the 4 (audio output positive) and 5 (audio output negative) ports.
Connect the audio cable to the audio input port of the camera from the professional power supply ports 4 and 5. The camera is plugged into the Internet cable and accessed by the back end through the router (NVR or PC host)
2. Pickups and common camera connections (using a common power supply)
Three-wire pickups and common webcams with audio require the following adapters
Pickups and Common Camera Connections (Using Common Power Supplies) Audio Video Surveillance System
Connect the pickups to the accessories, and then power the pickups separately. Connect the power to the DC male connector of the accessory. Connect the audio to the audio input port (Lotus socket) on the camera and then power on the camera. Connect to a router (switch). The back-end (NVR or PC host) accesses the front-end through the router to perform audio and video synchronization monitoring.
This article only briefly introduces these two methods of connection, of course, there are more connections, we can freely play.
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