This project involves designing a mobile phone charger circuit with two group members. The circuit uses an AC power supply, transformer, bridge rectifier, 1000μF capacitor, voltage regulator, 1kΩ resistor, LED diode, and USB female pin connected with wires. The procedure has 8 steps where the AC power is converted to 9V by the transformer, rectified to DC by the bridge rectifier, stabilized by the capacitor and voltage regulator, with the LED and resistor used to test the circuit and protect components, and the USB port as the output to charge a phone.

1. Project Name
Mobile Charger

2. Group Members
• Qazi Hammad Zaheer [25]
• Yawar Abbas [28]

3. Apparatus
• AC power supply
• A Transformer
• Bridge Rectifier(four diodes)
• Capacitor of 1000µF
• Voltage Regulator
• Resistor of 1kΩ
• LED Diode
• USB female pin
• Connecting wires

4. Circuit Diagram

5. Procedure
1) First we connected AC supply to transformer.
2) The Transformer converts the 220 volts into 9 volts.
3) After it we used a bridge rectifier which converts the AC
voltage into DC voltage.
4) We used a 1000µF capacitor which overcomes the fluctuation
produced.
5) We used a LED diode to check whether the circuit works or
not?
6) We also used a resistor of 1kΩ for the protection of LED.
7) We used voltage regulator to maintain the required voltage to
charge a cell phone.
8) We used USB female pin as a output from the third pin of
voltage regulator and the common ground.

6. THANK
YOU