Hi Guest
e.g. - "communication: RFID" Search tips
Find Projects
Model: 454    
Rs. 4,399
Rs. 3,519
10 in Stock
Discount 20%
Buy
Rs. 3,799
Rs. 3,039
10 in Stock
Discount 20%
Buy
Rs. 3,099
Rs. 2,479
10 in Stock
Discount 20%
Buy
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.
READ WHAT OTHERS HAVE SAID
Be the first person to review this project
WRITE A REVIEW
Name
Email
Location
Feedback
Please enter security code
Value
Quality
Rating Breakdown (0 Reviews)
0
0
0
0
0
SIGN UP FOR NEWSLETTER

Edgefx Technologies Pvt. Ltd.,
Plot No. 105, 3rd Floor,
Liberty Plaza, Himayathnagar,
Hyderabad - 500029,
Telangana, India
© 2012 Edgefx Technologies Pvt Ltd. All Rights Reserved