FPV Camera Connector Types and Wiring Guide
Symptoms / When to use this
Analogue FPV cameras, digital video transmitters, and action cameras all use different connector standards. Knowing what plugs into what before you start a build saves you from ordering the wrong cable or damaging a £200 camera.
Analogue Camera Connectors
Most analogue FPV cameras (Foxeer, Runcam, Caddx Ratel) use a JST 1.25mm or JST PH 2.0 connector for power and a bare wire for video signal. The video wire goes to your VTX's video input pin.
- Power: 5V regulated from your FC or a dedicated 5V BEC. Never power directly from LiPo — voltage spikes kill camera boards.
- Video signal: Single wire + ground. Keep the video wire away from ESC signal wires to avoid interference lines in the feed.
- OSD: Some cameras accept an OSD signal via a dedicated pin — check your VTX's documentation for compatibility.
Digital Video: DJI O3 / Walksnail / HDZero
Digital systems use a flat ribbon cable (DJI) or their own proprietary connector. DJI O3 cameras use a 20-pin Molex connector. Do not force it — it is keyed and will only insert one way.
Action Camera Power
GoPros and Insta360 cameras are powered by their own internal battery during flight. For longer flights, use a BEC-powered USB-C charge cable soldered to your FC's 5V pad — the camera charges in flight and the internal battery acts as a buffer against power spikes.
Common Wiring Mistakes
- Running video ground separately from power ground — always use a common ground point.
- Using thin 28AWG wire for camera power — use 24AWG minimum to avoid voltage drop causing camera resets.
- Routing video cable next to motor signal wires — causes interference bars in analogue feed.