CCTV systems use video cameras to transmit signals to monitors for security purposes. There are two main types of CCTV systems: wired systems connect cameras to recording devices and monitors using cables, while wireless systems attach radio transmitters to cameras and receivers to monitors. CCTV cameras come in different types depending on whether they are used indoors or outdoors, and provide day/night surveillance capabilities. Key elements of a CCTV system include cameras, lenses, monitors, recording devices like DVRs, storage, cables, and power supplies. CCTV cameras are commonly installed in schools, shops, hospitals, bars and other public areas for security and crime prevention.

1. (CLOSED CIRCUIT TELEVISION)

2. What is CCTV?
• Closed circuit television (CCTV) system is the
use of video cameras to transmit a signal to a
specific, limited set of monitors.
• It differs from broadcast television in that the
signal is not openly transmitted, though it may
employ point to point wireless links.

3. CCTV System Types
CCTV systems are broadly divided into two
types.
There are:
1. Wired CCTV system.
2. Wireless CCTV system.

4. Types of CCTV System
Wired CCTV system-
It connects the camera to the recording
device and monitor with the help of coaxial
cables or liber optic cables. The signal
transmitted over these cables is then fed to the
monitor.

5. Wireless CCTV system-
In this system a radio transmitter is
attached to the camera. A radio receiver is
then attached to the input on the monitor
system.

6. CCTV Camera Types
CCTV cameras are being installed every where for purpose
of security and crime prevention and detection. There are
many type if CCTV cameras are available for this purpose.
These are:
Indoor camera
Outdoor camera
Dome cameras
IR Day/ Night camera
Bullet camera
Network/IP
Wireless camera

7. Camera selection
 If we select the camera we will consider about
these categories
 Indoor or Outdoor
Day / Night surveillance
Lens selection
Wireless
POE (Only for IP) / Power source
Viewing
Camera from factor

8. Elements of CCTV system
• Camera
• Lens
• Monitor unit
• DVR / NVR
• Cable (coaxial / Ethernet)
• Storage devices
• DC power supply (12V)

9. DVR Back Side

11. Applications of CCTV camera
• Schools
• Shops
• Hospital
• Bar
• Cash rooms
• Historic sites
• Public areas
• Swimming pools
• Football and cricket stadiums
• Car park
• Other uses