- Parts List:- Transistor 2N2222 or S9013
- Resistor R1-47 or 50 ohm 1/4watt,
- Diode D1-IN4007,
- Zener Diode D2-5.1 Volt,
- Capacitor 2200uf/16 Volt, 470uf/16volt,
- Toroid from any OLD CFL and insulated copper wire 24 & 30 AWG,
Here is an interesting circuit to generate stable and secure 5V DC (at 500mA max) from an ordinary 1.5V AA sized cell. At the heart of this circuit is transistor 2n2222 you can use S9013. This charger circuit will step up the voltage from 1.5V to 5V DC. The circuit uses only an AA or AAA 1.5v battery (1V to 2.4V). The charger is composed of simple oscillator, a rectifier, and voltage regulator. The feedback winding F is composed 5 turns of #30 AWG magnetic wire and main winding P is composed of 6 turns of #24 AWG wire. The 5.1V Zener diode and 2200uF(use 4700uF 16v capacitor for more accuracy) capacitor regulates the output voltage to ensure proper charging.
The windings are not critical, and you can experiment using different number of turns. If ever the charger doesn’t have any output, try to reverse the winding connection.