11-09-2014, 11:11 AM
COIN BASED CELL PHONE CHARGER
[attachment=67816]
ABSTRACT
Now a days each & every person has mobile phone.
During long travel we may forget to bring the charger.
That time this coin based cell phone charger is useful.
It contain 89c51 microcontroller, relay & regulators are used.
POWER SUPPLY SECTION
12-0-12V transformer is used.
Primary of the transformer is connected to the main supply through ON/OFF switch & fuse.
Secondary is connected to diodes to convert from 12V ac to 12V dc.
Diodes are formed as two half wave rectifier.
One is for delivering 12 to 15V supply to relay & capacitor 2200mfd/25V is used for filter purpose.
Another side is fed the input of 7805 regulator and capacitor of 1000mfd/25 V is used for filter purpose to get pure dc voltage.
advantages
It can be useful while travelling and when we don’t have charger with us during travel.
We just need a coin to charge the cell phone.
Low capital cost.
Easy to use.
disadvantages
The life of the battery will be less than that of the given period.
There is a chance of high voltage flow during charging.
CONCLUSION
This project is very useful in today’s life.
Because nowadays every person having cell phone.
When they are going to long travel they may forget to carry the charger.
This project is used to help that person by coin based charger.
If it is placed in important places such as bus stand, petrol bunks, theatres then we will charge our mobile according to this project
[attachment=67816]
ABSTRACT
Now a days each & every person has mobile phone.
During long travel we may forget to bring the charger.
That time this coin based cell phone charger is useful.
It contain 89c51 microcontroller, relay & regulators are used.
POWER SUPPLY SECTION
12-0-12V transformer is used.
Primary of the transformer is connected to the main supply through ON/OFF switch & fuse.
Secondary is connected to diodes to convert from 12V ac to 12V dc.
Diodes are formed as two half wave rectifier.
One is for delivering 12 to 15V supply to relay & capacitor 2200mfd/25V is used for filter purpose.
Another side is fed the input of 7805 regulator and capacitor of 1000mfd/25 V is used for filter purpose to get pure dc voltage.
advantages
It can be useful while travelling and when we don’t have charger with us during travel.
We just need a coin to charge the cell phone.
Low capital cost.
Easy to use.
disadvantages
The life of the battery will be less than that of the given period.
There is a chance of high voltage flow during charging.
CONCLUSION
This project is very useful in today’s life.
Because nowadays every person having cell phone.
When they are going to long travel they may forget to carry the charger.
This project is used to help that person by coin based charger.
If it is placed in important places such as bus stand, petrol bunks, theatres then we will charge our mobile according to this project