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How To Make Power Bank Circuit On PCB

These days On Power Bank Circuit On PCB, digital products are being in immense demand. However, there are some products that you can make in your home with little things that you would get from the market. One such product is the power bank circuit. The power bank circuit composition is straightforward and can be made with little effort. There are numerous uses of the power bank circuit; for instance, you can use it as a spare power bank if you need it.

There are numerous ways to make the power bank circuit; e.g. one of the easiest ways is to use a boost converter for making the power bank. However, another easy way to make the power bank circuit is by using different modules that can be used to charge the cell phone.

1. A technique to make the Power Bank Circuit

This project is revolving around the making of the charging circuit from scratch. First of all, the basic circuit schematics are being made, which is then simulated. After debugging all the drawbacks of the circuit, its PCB is designed, which is then etched, and components are placed to make it work.

Power Bank Circuit on PCB1
Power Bank Circuit On PCB1

2. The Main Components Required

The following is the list of main components required for the project.

  • PCB board.
  • IC of TP4056
  • XL 6009
  • Inductors (33uH)
  • The female connector (USB)
  • Charging pin (Female/Mini USB)
  • Burg stick
  • Capacitors (1uF, 10uF, 220uF, 100uF, and 47uF)
  • Variable resistor of 5K ohms.
  • Lithium Cell 18650
  • LEDs
  • Diodes 1N5824
  • Resistors (1K ohm, and 1,2 K ohms)

3. Basic Circuit Diagram

The following is the basic circuit diagram of the power bank circuit.

Power Bank Circuit on PCB2
Power Bank Circuit On PCB2

4. Working of the main Circuitry

The main circuit diagram of the project has two main portions, one being the power bank charging circuitry and the other being DC to DC converter. The charging circuitry is being made with TP4056, and the converter is made with the XL6009. The converter boosts the voltage from 3.7V to 4.5V or 6V as required by the cell phone. The voltages are variated through a potentiometer to get the required level. The micro USB pin is used to charge the lithium cell (18650), and a female USB connector is utilized to charge the phone. Sliding Switch is also used for altering the charging mode of the 18650 cells of the phone.

Power Bank Circuit on PCB3
Power Bank Circuit On PCB3

5. The PCB Design of the Circuitry of Power Bank

The PCB can be designed through many software. However, EDA is recommended to be used for the design of printed circuit boards. The easy EDA is convenient and easy to use; this is why the software is highly recommended.

Before implementing the design of the printed circuit board of the power bank, it is highly recommended that schematics of the circuit be run successfully. When you have error-free-running simulations of the circuitry, you can make the connections easily in its PCB design and have error-free connections.

You are required to place the traces for the circuit, and meanwhile, you will place the components you require in the circuit. For example, either you place all the components for the design and then connect each component or place the traces and then place vias for the components—all it depends on your own need and ease.

The PCB is from WellPCB, a manufacturer of printed circuit boards. I got my PCBs in 4 days with excellent quality. Therefore, if you cannot make your own PCBs, provide its layout or circuit design to well PCBs, they can make for you.

The following is the design of the power bank circuitry.

Power Bank Circuit on PCB4
Power Bank Circuit On PCB4

6. Power Bank Circuit On PCBEtching, Drilling, and Soldering

When you finalize the design, print it on glossy paper, cut the PCB board, and paste it over it. However, it would help if you kept it under hot iron to paste the design over the PCB board. The next step is to etch the circuit using the copper sulphate solution. After that, you are required to check the connectivity of the circuit. Drill the vias and then, using soldering iron, put the components onto the circuit.

This is how the circuit of power bank look like after drilling and components soldering.

Power Bank Circuit On PCB5

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Emma Lu
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