Shielding Your Drone Electronics: A Guide to Waterproofing

Drones are becoming increasingly popular, and with their rise, the need to shield your drone electronics from the elements has become paramount. Whether you're flying for fun or for professional reasons, ensuring your drone's electronics are safeguarded against moisture is crucial. This guide will delve into the art of waterproofing your drone's electronics, ensuring longevity and reliability.

Understanding Conformal Coating

At the heart of waterproofing lies the importance of conformal coating—a protective film that clings to the intricacies of a printed circuit board (PCB). This coating acts as a barrier, insulating components and solder joints, thereby warding off potential electrical mishaps.

The Need for Waterproofing

Even if you don't envision your drone soaring over watery terrains or braving the rain, waterproofing your drone remains vital. Drones often encounter moisture from dew-laden grass or wet foliage during landings or unexpected crashes. By shielding against these unforeseen moisture sources, you not only prevent electrical issues but also enhance the lifespan of your drone's electronics.

Choosing the Right Waterproofing Solution

Two primary contenders dominate the waterproofing drone scene: silicone and acrylic. While acrylic boasts easy removal—just a touch of a soldering iron does the trick—it lacks in durability. Components in drones, like video transmitters, emit significant heat, which can compromise the acrylic coating. Hence, for most drone enthusiasts and professionals, silicone, with its superior heat resistance, emerges as the top choice.

Purchasing Silicone Conformal Coating

For those venturing into the realm of waterproofing, MG Chemicals Silicone Conformal Coating comes highly recommended. It's not just about its proven track record; the product also offers a UV indicator variant. This feature, which makes the coating glow under UV light, is invaluable for ensuring comprehensive coverage.

Preparation is Key

Before you embark on the waterproofing journey, ensure your drone is prepared and in top shape. If you're working with a new drone, assemble it completely, test its functionalities, and only then proceed with the coating. For drones that have seen some action, it's wise to clean the electronics, removing any grime or residue. Tools like isopropyl alcohol and an old toothbrush can be handy for this.

Applying the Conformal Coating

Safety first! Remember, conformal coatings on your drone electronics can emit fumes. Always work in a well-ventilated space. When applying the coating, concentrate on exposed metal areas—think solder joints, microchip pins, and other potential electrical conductors. However, exercise caution around components like:

• Flight controller: USB ports, boot buttons, and barometers

• FPV camera: Image sensors

• VTX and RX: Various buttons

The application should be even, resulting in a glossy protective layer. For those using the UV indicator variant, a UV torch can help verify coverage. Once applied, let the coating dry thoroughly—overnight is ideal.

Removing the Conformal Coating

Mistakes happen! If you've inadvertently coated an area or need to make adjustments, isopropyl alcohol is your best friend. A gentle scrub can remove the coating, and if you're working with solder pads, a soldering iron can also do the trick.

Flying in Adverse Conditions

While the thrill of flying in adverse conditions, it's essential to be prepared. Waterproofing is just one aspect. Be mindful of potential visibility issues, reduced thrust due to rain, possible signal disruptions, and challenges in controlling the drone amidst gusty winds. Post-flight, always dry your drone to prevent long-term corrosion.

In Case of a Water Crash

Accidents happen! If your drone takes an unplanned dip:

• Retrieve it promptly and disconnect the battery.

• Rinse with distilled water to eliminate minerals.

• Dry thoroughly. While the rice method is popular, using a fan and allowing ample drying time is more effective.

Conclusion

Waterproofing your drone's electronics is an investment in its longevity and performance. By adhering to the steps and tips outlined above, you can ensure your drone remains resilient against moisture, ready for countless adventures in the skies. Fly safe and soar high!