5 Volt DC Regulator to charge mobile phones from variable DC voltage
Mobile phones commonly charge with 5 volt regulated DC supply, so essentially we are going to build a 5 volt regulated DC deliver from 35 - 7 volt DC.This DC supply can be used to charge mobiles as well as the power supply for virtual circuits, breadboard circuits, ICs, microcontrollers and so on. For 12 volt or more you just need to set up a heat sink for better voltage and current.
This circuit in particular is composed a 5V voltage regulator IC (7805) and filter capacitors.
LM7805 Voltage Regulator
This incorporated circuit made by texas devices is very popular for regulating voltage as much as 35v down to 5v. It is recommended to use heatsink if the input voltage is above 12volt, so the heat dissipation is better and the output as well as the life of voltage regulator is not disturbed.
100uf Polorized Capacitor
This capacitor is polorized because of this it may most effective be positioned in only one direction. the gray stripe on one side with the arrows dictates the negative side of the capacitor.Application
Can be used to convert 12 volts from a car battery or a cigarette lighter into a universal 5 volt phone charger, which can later on connected to USB female.
Can convert fluctuating DC volts from source to stable and filtered 5 volt DC.
Protects your gadgets from draining over voltage than it's limit.
Connecting 5 Volt DC to USB female
Connect the negative from the above circuit to the black wire of USB wire and positive to red wire of USB. Connect the white and green wire together so phone is tricked into thinking it is connected to charger and can accept full ampere provided from the circuit, which can be around 1000mA.
This kind of wiring will work with most phones like iPhones and common android phones.
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