GVDA DualPower Pack V1 - Portable PowerBank

🧠 What is this project?

This is a compact portable powerbank designed to power a soldering iron or small devices like a phone. It uses a 18650 Li-ion battery, a TP4056 charging module, and an MT3608 boost converter to provide adjustable output voltage.

Perfect for beginners and makers who want to build a simple and useful electronics project.

---

⚙️ Assembly instructions:

1️⃣ Connect battery to TP4056  
Battery + → B+  
Battery – → B-  

2️⃣ Connect TP4056 to MT3608  
OUT+ → VIN+  
OUT– → VIN–  

3️⃣ Power and adjust voltage  
- Connect USB-C cable to TP4056  
- Measure output voltage on MT3608  
- Adjust using potentiometer:  
 • 9V → soldering iron  
 • 5V → phone  

⚠️ Set voltage BEFORE connecting device!

4️⃣ Connect output USB-C  
Red → OUT+  
Black → OUT–  

5️⃣ Final assembly  
- Insert components into the case  
- Install M2 threaded inserts (for plastics)  
- Glue gasket/seal if needed  
- Close enclosure  

---

⚠️ Safety notes:

- Double check polarity  
- Do not short circuit the battery  
- Use protected 18650 cell  
- Do not exceed safe voltage