Wireless Mobile charger

Project by

Inductive charging or Wireless charging is a convenient method to charge your smart phones without any wires. As you switch on the charging circuit, you can see that smartphone gets charging up. Wireless charging makes use of electromagnetic field to transfer energy from your charging circuit to the smartphone.


Charging circuit consist of an oscillator, switching circuit and a primary coil. Oscillator will generate oscillations which will be a square wave. MOSFET can be used as switching unit. It’s a three terminal device (drain source and gate). By controlling the gate voltage, current flow through the coil can be controlled.

Mutual induction is the basic principle behind wireless charging. Amount of mutual depends on the relative positioning of both the coils. If the coils are nearer to each other, most of the flux generated by the primary coil will interact with the secondary coil. Hence a high voltage will be induced in secondary coil. If the coils are farther apart, amount of flux linkage will be less and voltage induced art secondary coil will be less.








When power supply is on, oscillator will generates a signal which is fed to primary coil through a switching circuit. By using the principle of mutual induction, voltage is induced in the secondary coil in your smart phone .This induced voltage after rectification and regulation is used to charge your phone.

In short, the secondary coil in the smartphone will takes power from the alternating electromagnetic field induced in the primary coil of the charging circuit. Hence the phone gets charged without any wires.

Advantages of wireless charging:

  • Amount of cables used can be reduced.
  • Simply charges your smart phone.
  • Specific chargers are not needed. Charging circuit will be compatible with every smartphones

Switch on your charging circuit and watch your phone gets charging up.

User Review (5)


pls am in nigeria, i'm undertaking wireless mobile charging as my project and i will be glad if someone aid me with both the write up and the device. ibrahimmubaraq5@@gmail.com. its urgent.Thank you

Reply  Report Abuse   02 May,2017 03:05


hello, pls i am final year student taking this as my project for EEE 510, pls i need help from any one that is willing to, you can get me on facebook with dis email sbammami@yahoo.com or on whatsapp with dis number 09081015221

Reply  Report Abuse   20 March,2016 03:03


pls am in the western part of Ghana and a student of Takoradi polytechnic pursuing HND electrical/ electronics engineering, i'm undertaking wireless mobile charging as my project and i will be glad if someone aid me with both the write up and the device. dontohemmanuel@gmail.com Thank you.

Reply  Report Abuse   15 March,2016 10:03


Can you please tell me the names of these parts

Reply  Report Abuse   11 January,2016 05:01

BIBIN ALIAS cochin,Kerala

Wireless power transfer circuit consists of 2 circuits; oscillator circuit and switching circuit. Here astable multivibrator(using 555) is used as oscillator circuit and switching is done by Power mosfet (IRFP240).

Reply   Report Abuse   12 January,2016 09:01
Related Items