I have been building and learning FPV drone in the last couple of weeks. It has been a bumpy journey my me. I lost my very first 5-inch quad in a tall grass field in the first 15mins flight. Now I settled on my second quad which is a 3-inch cinewhoop. It is a solid build, with many crashes it does not fail on me, except this time, after a gentle landing on a wet grass field, I lost my video feed and control.
![](https://lianxu.me/wp-content/uploads/2020/10/my2ndquad-1024x1021.jpg)
Before I continue my post, here is the FPV build list.
◉ Frame: DIATONE MXC TAYCAN DUCT 3 INCH CINEWHOOP FRAME
◉ Flight Controller & ESC: MAMBA F722 MINI DJI F35 3-6S FLIGHT CONTROLLER STACK
◉ Video Transmitter & Cam: CaddxFPV Vista Digital HD FPVSystem
◉ Remote Controller & Goggle: DJI FPV remote controller and goggle
◉ GPS: Beitian Dual BN-220 GPS
◉ Beeper: New Vifly Finder 2
So, I brought home my quad, and after some inspections, I found that the 9v pad lost voltage. It’s 0. Here is the illustration of the issue on the FC.
![](https://lianxu.me/wp-content/uploads/2020/10/MAMBA-__F722DJIMINI-F35_pdf-3-1024x731.jpg)
Clearly, this pad has been damage due to the moisture.
After checking the vista specs, it takes input power: 7.4-26.4v, so, I decided to cut the 9v red line and connect to the VCC pad on the right side of the board. My video feed and control is back online again.
![](https://lianxu.me/wp-content/uploads/2020/10/MAMBA-__F722DJIMINI-F35_pdf-3-1-1024x731.jpg)
If you are asking me why you learn to fly FPV, it’s simple. You could fly. Share some of my FPV training videos.
Day 6 Training:
Day 7 Training.