Smartphones have become an essential part of our life and one of the adaptable products in the market. You can easily have access to the internet, music, multimedia, games and much more. What can be annoying is when the battery drops down while out are using it to call a friend, your mom or maybe your client!
You can choose to solve the
problem by choosing one of these two
solutions; one, buy an expensive portable battery charger or make your portable charger in a competitive market price. Although it might not have all that
innovative tech in it, it still serves the purpose. All you need is to buy the
right parts and standard batteries to DIY to recharge your phone on the go.
List Of Parts Required To Make The Circuit For The Charger
·
U1- a voltage regulator
·
LED-light emitting diode
·
R1- resistor (330 Ω)
·
R2- resistor (75 kΩ)
·
R3- resistor (75 kΩ)
·
R4- resistor (51 kΩ)
·
R5- resistor (51 kΩ)
·
D1- rectifier diode
·
USB- solderable
·
A battery connector
You can easily find these parts
in any supermarket nearby. You just need to be careful as we move on to the
building process.
How The Circuit Works
The circuit you are going to build is going to be around the LM7805 chip. It is a voltage regulator that takes the input of 7V up to 30V and gives out 5V to 1A of current. You can apply an LED and R1 resistor between 5V and the minus of the battery. It is not an essential part of the circuit and works perfectly fine without these components.
However, the resistors from R1
to R5 are necessary as they are used to set the
voltage on the data lines to correct voltages. The voltage ensures that
the circuit can give the current needed
to charge a phone. The circuit is
suitable to charge an iPhone and other devices with 500 mA.
The D1 in the list ensures that you do not destroy the circuit if
you connect the opposite charges. It also reduces the voltage to 1V which is
not enough for the charger to work. It is not necessary to have this diode as
well, but it’s a part of taking
precaution, so it’s worth it. Apart from
reducing the voltage, it also reduces the heat emitted from 9V input.
The USB charger circuit needs 6
AA batteries or 6 AAA batteries or a 9V battery to work. All these batteries
are easily available at any supermarket.
How To Build A Charger Circuit
It is rather easy to put together the components. When you take out the USB adapter, you’ll see the curved sides which are negatively charged, and the square in the center is positive.
Take the battery clip and clip the red wire with the positive and black wire with the negative. Use a soldering iron to attach the negative with negative and positive with positive. Plug in the battery to finally test the charger. If the ED light you attached is lit up, it works perfectly fine.
Next, punch a hole in the container and glue all the components in it to secure it. Plug in your phone charger cord and your phone to charge and you’re ready to go!
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