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PROJECT DESCRIPTION

The main objective of this project is to develop a circuit to switch off the TV automatically by a relay mechanism whenever the video signal is not available.  

The project is designed to actuate a relay whenever an input video signal is fed to it. For example, it can be used for switching off a TV automatically once the video signals are not available.

This simple circuit activates a relay when it senses a composite video signal. Video signals are amplified by a transistor to drive the relay through another driving transistor. While the video signals are not available, the driving transistor switches off to turn off the load.

PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Non-Microcontroller Project.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm.
Can be Customized for Arduino, Raspberry Pi, PIC
BLOCK DIAGRAM
Auto Switch Off of TV while Screen Goes without Video
Hardware Requirements
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Regulator
  • Relay
  • Lamp
Software Requirements
    None
Q & A
Q:  Where is it used?
A:  It is used at shopping mall, theaters, hotels, where automatic door opening is required
Q:  What is the concept of this project?
A:  The concept is to develop a temperature control system using a thermistor.
Q:  What is the formula for calculating smoothing capacitor value?
A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.
Q:  What to do when the lamp fails and what is the maximum lamp rating that can be used?
A:  If the lamp fails one can use any lamp or bulb which is used in homes up to 100W. We suggest you to go for low watt bulbs.
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Hyderabad - 500029,
Telangana, India
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