phone charger by using diodes
mobile phone charger using diodes:
this is simple mobile charger.the main component for this project is two diodes one is normal pn junction diode(IN 4007) and another one id zener diode.one transistor,one resistor(560 ohm) and one capacitor (100 micro F)and one USB plug.this is the main components.
here we use only 5 V input DC supply.the positive terminal of the power supply is connected to the cathode terminal of the pn junction diode and this anode is connected to the emitter of the transistor.the negative terminal of the power supply is connected to the cathode side of the zener diode and this positive terminal is connected to the base terminal of the transistor.the collector terminal of the transistor is connected to the resistor and other end of the resistor is connected to the capacitor and other end of the capacitor is connected to the anode side of the zener diode and negative terminal of the USB.the base terminal of the npn transistor is connected to the resistor and capacitor.collector terminal of the npn transistor is connected to the positive terminal of the USB. this the process for this project.