Are you looking to build your own DIY power bank at home? In this blog post, we’ll show you how to create a powerful and efficient power bank module using commonly available components like the TP4056 charging module, XL6009 boost converter, and a lithium battery. This guide also includes a complete circuit diagram, component list, and working explanation to help you create your own power bank with ease.

📷 Circuit Diagram:

Below is the full schematic of the power bank circuit:

🧰 Components List (Serially):

1. TP4056 Battery Charging Module (U1)
2. XL6009 Boost Converter Module (U3)
3. Lithium-Ion Battery (BAT1)
4. USB Type-A Female Port (J6, J8)
5. USB Micro-B Input Port (USB1)
6. Zener Diode for USB Voltage Protection (D4)
7. 1N5824 Schottky Diode (D3)
8. 10µF Capacitor (C1, C2)
9. 47µF Capacitor (C4), 1µF Capacitor (C5, C6)
10. 220µF Capacitor (C3)
11. 33µH Inductor (L1)
12. LEDs for Charging/Status Indication (D1, D2)
13. Resistors: 1kΩ (R1–R6), 5kΩ Potentiometer (PR1), 10k NTC Thermistor (R7)

⚡ How It Works:

This DIY power bank consists of two main sections:

✅ 1. Charging Section – TP4056 Module

The TP4056 (U1) IC is responsible for charging the Li-ion battery safely via a Micro-USB port.

The resistors (R1–R5), NTC thermistor (R7), and capacitors (C1, C2) help regulate the charge current and temperature monitoring.

LEDs D1 and D2 provide charging status indicators (Charging/Full).

✅ 2. Boost Converter Section – XL6009 Module

1. The XL6009 module (U3) boosts the 3.7V from the battery to a stable 5V output, suitable for USB devices.
2. A 1N5824 Schottky diode (D3) protects against reverse current.
3. The Zener diode (D4) stabilizes USB voltage and protects connected devices.
4. Output voltage can be adjusted using the PR1 potentiometer.
5. USB-A ports (J6, J8) provide 5V output for charging smartphones, gadgets, or small electronics.

🔋 Power Output:

Output Voltage: 5V (regulated)

Battery Input: 3.7V Lithium-Ion

Output Current: Up to 1A – 1.5A, depending on battery capacity

🛠️ Assembly Tips:

Use 18650 lithium cells for higher backup capacity (e.g., 2200mAh x 2 = 4400mAh).

Solder components carefully or use a PCB from EasyEDA.

Ensure good heat dissipation on XL6009 if using high loads.

🎯 Applications:

Emergency smartphone charger

DIY USB gadget power supply

Portable LED light battery pack

Custom power solutions for hobby electronics

📌 Safety Tips:

Always use protected 18650 cells or add a protection circuit.

Don’t overcharge or short-circuit the battery.

Use proper casing to avoid physical damage or moisture

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📽️ Bonus: YouTube Tutorial

If you have a video on this project, embed it here with a short description like:

Watch this full step-by-step tutorial on YouTube to build your power bank from scratch using TP4056 and XL6009. 🔋

✍️ Final Words:

Creating your own power bank module is a great way to learn electronics and power systems. This project is affordable, educational, and practical. You can also upgrade the battery size or add features like solar input for advanced versions.

Have any questions or want the PCB layout? Let us know in the comments below!