In this PC Tablet Power Bank that will design is used cell batteries from laptops specially laptops cell batteries reused. We only need two cell batteries that will produce 8 .2 volts when we series .
It because one cell battery produce 4 .1 volts . With using regulators IC LM 7805, we will get outputs of this electronic circuits schematic we will get 5 Volt with more than 1.8 amperes . So this output voltage can used to charge our PC Tablet that need 5 volts input.
Circuit Schematic
1 . Laptop Cell Batteries
2 . LM 7805
3 . Switch Selector
4 . Resistor 4K 7 ohms
5 . LED
6 . Output Connector
Circuit Performance
1 . When we series two batteries @ 4.1 volts
we will get 8 .2 volts output voltages that need to charge our PC tablet.
2 . To make output voltages 5 Volts with more than 1. 8 amperes we need voltage regulator 5 volt using IC LM 7805.
3 . To know that this voltage is work to exit the voltage we add the indicator using LED that stabilized using R 4K 7 ohms
