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Wireless mobile charger

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How to make a wireless mobile charger

Published in: Engineering
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Wireless mobile charger

  1. 1. Contents  Introduction.  Working Principle.  Circuit Diagram & Design.  Operating Process.  Advantages.  Application.  Limitations.
  2. 2. Introduction Each phone will have its own designed battery charger. Thus the battery chargers are required to carry everywhere to keep the battery backup. Now just think of a battery charger that charges your obile automatically. When you sit for tea and place your mobile on the table, it simply charges your mobile. This article explains a simple wireless battery charger circuit that charges your mobile when placed near the transmitter. This circuit may be used as wireless power transfer circuit, wireless mobile charger circuit, wireless battery charger circuit, etc.
  3. 3. Working Principle This circuit mainly works on the principle of mutual inductance. Power is transferred from transmitter to the receiver wirelessly based on the principle of “inductive coupling”.
  4. 4. Circuit Diagram & Design o Resistors o Capacitors o Diodes o Voltage Regulator o Copper Coil o Transformers o MOSFET o LED
  5. 5. Operating Process Initially, connect the circuit as shown in the circuit diagram. Switch on the supply. Connect the battery charger at the output of the circuit. Place the receiver coil near the transmitter coil. You can observe the charging of battery.
  6. 6. Advantages  Usage of separate charger is eliminated.  Phone can be charged anywhere and anytime.  It does not require wire for charging.  Easier than plug into power cable.
  7. 7. Application  Wireless chargers can be used to charge mobiles, camera batteries, Bluetooth headsets etc.  This can also be used in applications like car battery charger with little modification.  This can also be used in medical devices.
  8. 8. Limitations  Power is somewhat wasted due to mutual induction.  It will work for very short distances only. If you want to use it for long distances, then the number of inductor turns should be high.
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