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Model: 454    

Do-It-Yourself Kit (recommended)

Rs. 4,399

Rs. 3,739

( You Save: Rs. 660 )

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With an Assembled & Tested PCB

DIY kit comes with an Assembled and Tested PCB ensuring 100% output guarantee. Includes hardware for assembling project from scratch. Fully supported by elaborate documentation, audio visuals and tools to independently carry out the project work.

PROJECT DESCRIPTION

This project is designed to control home appliances based on a fixed-time delay for each load by using a 555 timer to generate switching period intervals  to drive a relay to switch ON or OFF for any load.

A time-delay based relay is a relay that stays on for a certain period of time once activated. This circuit is made up of a simple adjustable timer circuit that controls the actual relay.

The time is adjustable from 0 to few seconds, but can be increased by increasing the time constant of the mono-stable 555-timer. The current handling capacity of the load is limited by the kind of relay used. The project is offered with a lamp as a 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
Home Appliances Control with Time Delay Switch
Hardware Requirements
  • Resistors
  • Potentiometer
  • Capacitors
  • Diodes
  • Relay
  • Timer IC
  • Lamp
Software Requirements
    None
Q & A
Q:  In which mode 555-timer works?
A:  555 timer works in monostable mode
Q:  What is the principle?
A:  The principle behind the project is using 555-timer with RC time constant
Q:  What is time delay based relay operated load?
A:  It is controlling the switching of load, as per the time decided by the RC time constant of the 555 timer.
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.
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Hyderabad - 500029,
Telangana, India
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