08-11-2012, 03:36 PM
Auto turn off for DC Motor with four different time slots
Auto turn offfor DC Motor with four different time slots.docx (Size: 130.61 KB / Downloads: 27)
Abstract
Introduction: Now-a-days, we are facing a serious shortfall in power generation, so the need for saving the power is increasing rapidly. This project is aimed to make use of automatic power cut off system to save the power.
Objective: The main objective of this project is to design the automatic power turn off for DC Motor in different time periods. Here we are going to operate a DC Motor for a small duration. This project provides the facility of automatic switch off after the required time duration by using RTC DS1307 real time Clock.
In this we use the 16 X 2 Liquid Crystal display (LCD) which is connected to the microcontroller to display the status of the DC Motor.
This project uses regulated 5V, 500mA power supply. LM7805 three terminal voltage regulator is used for voltage regulation. The 9-volt adapter converts AC current to DC current.
Software Tools:
Keil version 3
Embedded C
Flash magic
Hardware Tools:
Microcontroller
DS1307
Applications:
In Homes
In Industries
In Automated Applications
AC Adapter:
Most 9-volt adapter units work by converting 110 volts of alternating current, or AC, electrical power into 9 volts of direct current, or DC, losing some energy in the process. The adapter then supplies DC power to an electronic device through a cord.
1. Parts
A 9-volt adapter contains several internal components that deliver the power safely, including a filter capacitor and a rectifier.
9V Adaptar
Conversion
Nine-volt adapters accomplish the actual AC/DC conversion using the rectifier circuit. The rectifier uses diodes that only permit electricity to move in one direction. This process generates some heat, causing the adapter to become warm. Some 9-volt adapters contain grating in the plastic to release excess heat.
Effects
An adapter can influence the size and weight of the electronic device, making it smaller and lighter, because the device doesn't have to convert AC power to 9 volts. Also, if retailers sell the adapter separately, the device's initial cost may decrease.
DS 1307:
The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock with 56 bytes of NV SRAM. It has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the backup supply.