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.
HIGHLIGHTS
- Fixed- time delay
- 555 timer
- Simple adjustable timer circuit
- Monostable 555-timer
BLOCK DIAGRAM
HARDWARE REQUIREMENTS
- 555 IC
- Load
- Relay
- Transformer
SOFTWARE REQUIREMENTS
- Eagle
Santosh Sharma –
I needed a electrical project for final year so I went for this project, the project was well tested, also it is in plug and play condition. And it’s impressive as it gives almost accurate results.
Steve Foicrlough –
A great level of detail and understanding from these guys. I come from a power background personally, so I struggled a little with an electronic based project. However, Electrosal made this seamless. Through, easy communication and extremely compotent professionals. Highly recommended thank