Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the DROK Waterproof DC Buck Converter, Model 090010. This device is designed to efficiently convert a higher DC input voltage (8-22V) to a lower, adjustable DC output voltage (3-15V) with a maximum current of 3A. Its waterproof and robust design makes it suitable for various applications, including automotive, motor, and general electronic projects.
Product Overview
The DROK Waterproof DC Buck Converter features a compact design with an aluminum alloy case, offering durability and protection against environmental factors. Key features include:
- Synchronous Rectification Technology: Ensures high conversion efficiency and stable performance.
- Adjustable Output Voltage: A built-in potentiometer allows for precise adjustment of the output voltage.
- Robust Construction: Fully sealed, waterproof, anti-shock, anti-humidity, and dust-proof for enhanced durability.
- Integrated Protections: Includes reversed-connection protection, over-current protection, over-heating protection, and over-voltage protection for safe operation.



Specifications
| Feature | Detail |
|---|---|
| Input Voltage Range | DC 8-22V |
| Output Voltage Range | DC 3-15V (Adjustable) |
| Maximum Output Current | 3 Amps |
| Conversion Efficiency | Up to 95% (Synchronous Rectification) |
| Protection Features | Reversed-connection, Over-current, Over-heating, Over-voltage |
| Dimensions (L x W x H) | 1.3 x 0.98 x 0.79 inches (33 x 25 x 20 mm) |
| Weight | 0.01 ounces (approximately 0.28 grams) |
| Enclosure Material | Aluminum Alloy |
| Certifications | CE, RoHS, UL |
Setup and Installation
Before installation, ensure all power sources are disconnected to prevent electrical shock or damage to the device. The buck converter has clearly marked input and output wires.
- Identify Wires:
- Input (IN): Red wire for positive (+), Black wire for negative (-). Connect these to your DC power source (8-22V).
- Output (OUT): Yellow wire for positive (+), Black wire for negative (-). Connect these to your load device (3-15V).
- Wiring Connections: Securely connect the input wires to your power source and the output wires to your load. Ensure correct polarity to avoid damage. The device includes reversed-connection protection, but proper wiring is always recommended.
- Mounting: The compact design allows for flexible mounting. Ensure the converter is placed in a location that allows for adequate heat dissipation, especially during prolonged operation or high loads.
- Initial Voltage Adjustment: Before connecting the load, it is recommended to adjust the output voltage to the desired level.
- WARNING: Do not connect your load before adjusting the output voltage. Incorrect voltage can damage your device.
- Connect the input power source to the converter.
- Use a multimeter to measure the voltage across the output (yellow and black) wires.
- Locate the small blue potentiometer screw on the side of the converter.
- Using a small screwdriver, carefully turn the potentiometer clockwise to increase the output voltage or counter-clockwise to decrease it until the desired voltage (between 3V and 15V) is achieved.
- Connect Load: Once the output voltage is set, disconnect the input power, connect your load device to the output wires, and then reapply power.


Operating Instructions
Once properly installed and the output voltage adjusted, the DROK Waterproof DC Buck Converter operates automatically. It will maintain the set output voltage as long as the input voltage is within the specified range (8-22V) and the load current does not exceed 3A.
- Monitoring: Periodically check the output voltage with a multimeter if precise voltage is critical for your application.
- Load Considerations: Ensure the connected load does not draw more than 3A. Exceeding this limit may trigger over-current protection or damage the converter.
- Environmental Conditions: While waterproof, avoid prolonged submersion or exposure to extreme temperatures beyond its operational limits to ensure longevity.
This video demonstrates the DROK 090010 Buck Converter's voltage adjustment process using a multimeter and screwdriver, followed by a demonstration of its waterproof capability while powering a small motor.
Maintenance
The DROK Waterproof DC Buck Converter is designed for minimal maintenance due to its sealed and robust construction.
- Cleaning: If necessary, gently wipe the exterior with a dry or slightly damp cloth. Do not use harsh chemicals or abrasive materials.
- Inspection: Periodically inspect the wiring connections for any signs of wear, corrosion, or loose connections. Ensure the converter is free from physical damage.
- Heat Dissipation: Ensure the area around the converter remains clear to allow for proper heat dissipation. While the case acts as a heat sink, restricted airflow can lead to overheating under heavy loads.
Troubleshooting
If you encounter issues with your DROK Waterproof DC Buck Converter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No output voltage or unstable output. |
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| Converter gets excessively hot. |
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| Output voltage drops under load. |
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Warranty and Support
DROK products are designed for reliability and performance. For specific warranty information and technical support, please refer to the official DROK website or contact their customer service directly. Keep your purchase receipt as proof of purchase for any warranty claims.
For further assistance, visit the DROK Store on Amazon.





