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Video Activated Relay to Control the Load
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PROJECT DESCRIPTION

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 a relay through another driving transistor. While the video signals are not available the driving transistor switches OFF to turn OFF the load.

PROJECT HIGHLIGHTS
Non-Microcontroller Project.
Extensive audio-visuals available.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm.
All-inclusive solution kit.
Easy to use, Self-explanatory kit.
BLOCK DIAGRAM
Hardware Requirements
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Regulator
  • Relay
  • Lamp
Software Requirements
    None
Q & A
Q:  What is the concept of this project?
A:  It actuates the relay whenever an input video signal is fed to it.
Q:  Where is it used?
A:  It is used for automatic video recording
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.
READ WHAT OTHERS HAVE SAID
Average Rating
 5/5
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Showing 1 of 1 reviews
sonukumar, HYD on 13th May, 2014, 03:33 PM

The given project is worked very well without creating any problems. And also the given material is very interesting to gain some knowledge on this project. Thanks to Edgefx Team.

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