🔋 Portable Workbench Power Supply

🔥 DIY Portable Workbench Power Supply with adjustable output (1.25V – 10V) for electronics testing and lab work.

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⚡ Quick Start

1. Connect 12V input power
2. Turn ON the switch
3. Adjust voltage using knob
4. Monitor voltage on display
5. Use required output (DC / USB / Banana terminals)

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⚡ Features

• Adjustable output voltage (1.25V – 10V)
• Built-in voltmeter for real-time monitoring
• Precision control knob
• 2+ hours battery backup
• Lightweight & portable design
• Strong and durable build

🔌 Multiple Output Options

• DC output pins
• USB output (5V)
• Banana plug terminals

🛡️ Protection

• 10A fuse protection
• Safe for electronics testing

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💡 Why This Project?

• Portable power supply for field work
• No programming required
• Beginner-friendly + practical use
• All-in-one compact solution

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📸 Project Preview

🔧 Front View

🔍 Inside Components

🔌 Circuit Diagram

🔙 Back View

⚡ Output View

Portable and compact power supply for electronics testing

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🔧 Components Used

🔋 Power & Battery Section

• 18650 Lithium-ion Batteries (2500mAh) – 4 pcs (4S pack)
• 4S BMS (Battery Management System 40A)

⚡ Input / Charging Section

• 12V DC Female Connector (Input)
• 10A Fuse + Holder
• ON/OFF Switch – 2 pcs

🔄 Power Conversion Section

• DC-DC Step-Up Module (6009 / 6019)
• DC-DC Step-Down Module (4015)
• 10K Multi-turn Potentiometer

🔌 Output Section

• 12V DC Female Connector (Output)
• USB Female Connector (5V output)
• Banana Connectors (Red & Black)

💡 Indicators & Monitoring

• 7-Segment Voltmeter Display
• 5mm LEDs – 2 pcs (Red & Green)
• 1K Resistors – 2 pcs

🔧 Miscellaneous

• Connection wires (proper thickness recommended)
• Enclosure / Storage Box

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🧠 Working Principle

The power supply uses DC-DC converter modules to regulate voltage.

• Input power is supplied through DC input
• Battery pack provides portable operation
• Step-up and step-down modules regulate voltage
• Output voltage is adjusted using potentiometer
• Voltmeter displays real-time voltage

This ensures stable and safe power for electronic testing.

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⚠️ Safety Precautions

• Always check input voltage before connecting
• Ensure correct polarity
• Avoid short circuits
• Do not touch live wires
• Use proper insulation

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🛠️ Build Notes

• No programming required
• Fully hardware-based design
• Simple wiring and module integration

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🎯 Applications

• Electronics testing
• DIY projects
• Lab experiments
• Mobile repair workbench

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