American University of the Middle EastCEEE201PROJECT


Our project depends upon tow ideas the primary one it’s an electrical circuit depending on daylight solar vitality and the second one is an electrical charger circuit and on the off chance that you just get them organized together you will have solar based mostly energy charger . We picked the sunlight based energy since it’s a sustainable power supply, accessible anyplace, ecofriendly, and value sparing).

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According to (Glenn T.Drilek) & (Merl E.converse) “The current invention offers for a completely versatile and variant battery charger which adjusts mechanically to the charging mode and the voltage required.

The battery charger of the present invention mechanically offers the most expedient charging mode, by offering a relentless voltage area, a relentless current region”.


The reason we picked this task the sun powered energy – That it’s a sustainable energy source, and it’s a supply that you’ll find it anyplace.

The sun oriented vitality its great since it is eco-accommodating which suggests that there are no unsafe gases originated from the sun powered board ,sun oriented power offers value sparing on the grounds that you just won’t have to pay for the ability and as you in all probability are conscious the expense of energy retains on ascending.

Where the expense of the sunlight primarily based board keeps on falling, and it’s a simple technique to have energy in poor nations.


I_max= I_SC= V_B1/R_5

I_LED = (V_B1- V_LEDF- V_DF)/(R_5+ R)

  • 1 – to start with we chose the yelow led to know if the photo voltaic is working or not “the led is 9 voltage “
  • 2 – thin we had a dayod silicon , and we used it to cease the electrical from reversing in the battery.

  • 3 – the voltage regulator have three limbs “the output is 5 volt as a end result of it’s charging in that voltage “

the two sides within the middle each one of them will have to have a particular value of voltage. certainly one of them is 2 volt and the opposite one is 2.2 volt. While the constructive is 5 volt and the ground is taken into account as 0 volt. all the smartphones corporations technique is that they use these amount of voltage values to charge the telephones.


  • 1- recognition of the need: the need of our task is to have daylight primarily based capability to decrease the utilization of energy ,moreover we can spare the final population reserves
  • 2- Definition of the design problem: The issue with solar energy if you use it ought to occurs when the solar is shining and if the climate cloudy the sunshine or energy will be less. Along these strains, substantial capacity frameworks ought to be produced to offer a dependable wellspring of energy when the sun isn’t shinning around night time or when cloud goes overhead.
  • 3- definition of the design standards an constraints: the design criteria that its an reliable photo voltaic energy charger that’s we selected the a good voltage regulator and a great photo voltaic panels that can work in hot spots and it’s a excessive caliber to work for fairly a while
  • 4-the design loop:
    • -our first ideas were to construct a charger that straightforward to carry an we will take advantage of it everywhere
    • – we selected to run with a simple charger however after researching we selected to construct a solar energy charger
    • – we conclude that the solar power charger is the least troublesome and probably the most acceptable, appropriate for us

Complete Resultes:

Solar panel could be changed with voltage source in series with resistance. So current is managed as following:

I_max= I_SC= V_B1/R_5 = 9V/10=900 mA

This step is helpful in simulation to exchange the photo voltaic panel.

In day time the circuit left half will be as following:

In DC regular state C1 and C2 shall be open circuits however they are useful in the circuit for filtering and fill drops in voltage.

A 0.7VDC will absorbed by D2 diode and a present will flow turning on the LED and the rechargeable battery will charge.

Forward voltage of LED VLEDF = 2.2V from datasheet of the LED

Forward voltage of diode VDF = zero.7V

Current passing through LED:

I_LED = (V_B1- V_LEDF- V_DF)/(R_5+ R) = (9-2.2-0.7)/(100+10) =54mA

That will feed the 7805-voltage regulator with:

V_in= I_LED*R + V_LEDF =54m – 100+2.2

V_in=7.6 V

The regulator will minimize the input voltage and produce fastened 5 VDC required to power the USB.

Voltage divider circuit:

It’s used to give particular voltages on information pins of the USB. These voltages imagined to be seen by some smart phones to start charging.

This further divider circuit is optionally available as a outcome of not all cell phones want them on the USB data.

V_(D-)=V_cc R_4/(R_3+R_4 )=5 51/(51+75)=2V

V_(D+)=V_cc R_2/(R_2+R_1 )=5 51/(51+75)=2VDC

We can calculate currents I1 and I2

I_1=V_cc/(R_3+R_4 )=5/(51+75)=0.04mA

I_2=V_cc/(R_1+R_2 )=5/(51+43)=0.05m


Simulation shown below have been obtained from Proteus software program. The results have been as anticipated.

LED is ON when we start simulation. Voltages produced as we calculated in earlier section. Currents simulation even have shut values to our calculations as proven under.


To close our project depend on primary material and a primary daylight power circuit and once we picked the daylight power photo voltaic vitality as our project we take into consideration that its easy and eco-Fridley

We used a voltage controller voltage regulator that may change over any measure of voltage to five voltage since all the brand new superior cell phone require a 5 voltage of power to cost so the majority of our enterprise depends upon the advanced mobile phone organizations data.

Refrences :

  • 1- Converse, M. E., & Darilek, G. T. (1983). U.S. Patent No. four,390,828. Washington, DC: U.S. Patent and Trademark Office

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