Power path
Battery lead, ESC input, capacitor, VBAT sensing, and rail limits need to be explicit before any diagram can be trusted.
- Connector matches current class
- Capacitor placement is documented
- 5V and 9V rails stay within board limits
Wiring workspace
From selected parts to pad-level confidence.
Rotor Genie wiring guidance should reserve pads, warn on conflicts, and produce a pre-power checklist before a builder plugs in a pack.
5-inch analog with full accessories
Example F405 pad plan
Choose parts in Build Lab to replace this sample pad plan with your saved selection.
Board photo needed
T1
UART transmit pad
Sends serial data from the FC to the accessory.
Signal output · Confidence: high
R1
UART receive pad
Receives serial data from the accessory into the FC.
Signal input · Confidence: high
5V
Regulated 5V power pad
Provides regulated 5V power for low-current accessories.
5V power rail · Confidence: medium
GND
Accessory ground pad
Provides the ground return for powered accessories.
Ground return · Confidence: medium
T2
UART transmit pad
Sends serial data from the FC to the accessory.
Signal output · Confidence: high
R2
UART receive pad
Receives serial data from the accessory into the FC.
Signal input · Confidence: high
VTX
Video output to transmitter
Sends analog video from the FC OSD to the video transmitter.
Signal output · Confidence: high
CAM
Camera video input
Receives analog video from the FPV camera.
Signal input · Confidence: high
T3
UART transmit pad
Sends serial data from the FC to the accessory.
Signal output · Confidence: high
R3
UART receive pad
Receives serial data from the accessory into the FC.
Signal input · Confidence: high
BZ+
Buzzer positive pad
Feeds positive voltage to the lost-model buzzer.
BZ+ power rail · Confidence: high
BZ-
Buzzer negative control
Switches the buzzer ground side from Betaflight.
Signal output · Confidence: high
LED
LED signal output
Controls addressable LED strips from Betaflight.
Signal output · Confidence: high
Connection summary
elrs-nano-rx
receiverelrs-nano-rx carries stick commands and telemetry back to the radio.
T1·UART transmit pad
R1·UART receive pad
5V·Regulated 5V power pad
GND·Accessory ground pad
analog-smart-audio-vtx
vtxanalog-smart-audio-vtx sends the camera feed and may need a control wire for band, channel, or power changes.
T2·UART transmit pad
R2·UART receive pad
VTX·Video output to transmitter
5V·Regulated 5V power pad
GND·Accessory ground pad
analog-micro-camera
cameraanalog-micro-camera sends the flight camera video signal into the FC or video system.
CAM·Camera video input
5V·Regulated 5V power pad
GND·Accessory ground pad
m10-gps
gpsm10-gps uses serial data so Betaflight can read position and rescue data.
T3·UART transmit pad
R3·UART receive pad
5V·Regulated 5V power pad
GND·Accessory ground pad
lost-model-buzzer
buzzerlost-model-buzzer uses buzzer pads so the quad can scream when it is lost or disarmed.
BZ+·Buzzer positive pad
BZ-·Buzzer negative control
racewire-led-strip
ledracewire-led-strip uses the LED signal pad plus 5V and ground for lighting control.
LED·LED signal output
5V·Regulated 5V power pad
GND·Accessory ground pad
Build-specific connection map
FC pad/function, connected component lead, and signal/power/ground grouping from the saved Build Lab selection.
| Group | FC pad / function | Connected component | Warnings |
|---|---|---|---|
| signal | T1 UART transmit pad Sends serial data from the FC to the accessory. | elrs-nano-rx elrs-nano-rx serial RX / control input receiver | Verify orientation before soldering. |
R1 UART receive pad Receives serial data from the accessory into the FC. | elrs-nano-rx elrs-nano-rx serial TX / telemetry output receiver | Verify orientation before soldering. | |
T2 UART transmit pad Sends serial data from the FC to the accessory. | analog-smart-audio-vtx analog-smart-audio-vtx serial RX / control input vtx | Verify orientation before soldering. | |
R2 UART receive pad Receives serial data from the accessory into the FC. | analog-smart-audio-vtx analog-smart-audio-vtx serial TX / telemetry output vtx | Verify orientation before soldering. | |
VTX Video output to transmitter Sends analog video from the FC OSD to the video transmitter. | analog-smart-audio-vtx analog-smart-audio-vtx video input vtx | Verify orientation before soldering. | |
CAM Camera video input Receives analog video from the FPV camera. | analog-micro-camera analog-micro-camera video signal output camera | Verify orientation before soldering. | |
T3 UART transmit pad Sends serial data from the FC to the accessory. | m10-gps m10-gps serial RX / control input gps | Verify orientation before soldering. | |
R3 UART receive pad Receives serial data from the accessory into the FC. | m10-gps m10-gps serial TX / telemetry output gps | Verify orientation before soldering. | |
BZ- Buzzer negative control Switches the buzzer ground side from Betaflight. | lost-model-buzzer lost-model-buzzer buzzer negative/control lead buzzer | Verify orientation before soldering. | |
LED LED signal output Controls addressable LED strips from Betaflight. | racewire-led-strip racewire-led-strip LED data input led | Verify orientation before soldering. | |
| power | 5V Regulated 5V power pad Provides regulated 5V power for low-current accessories. | elrs-nano-rx elrs-nano-rx power input (5V) receiver | Pad confidence is medium; verify against the manufacturer diagram before soldering. |
5V Regulated 5V power pad Provides regulated 5V power for low-current accessories. | analog-smart-audio-vtx analog-smart-audio-vtx power input (5V) vtx | Pad confidence is medium; verify against the manufacturer diagram before soldering. | |
5V Regulated 5V power pad Provides regulated 5V power for low-current accessories. | analog-micro-camera analog-micro-camera power input (5V) camera | Pad confidence is medium; verify against the manufacturer diagram before soldering. | |
5V Regulated 5V power pad Provides regulated 5V power for low-current accessories. | m10-gps m10-gps power input (5V) gps | Pad confidence is medium; verify against the manufacturer diagram before soldering. | |
BZ+ Buzzer positive pad Feeds positive voltage to the lost-model buzzer. | lost-model-buzzer lost-model-buzzer power input buzzer | Verify orientation before soldering. | |
5V Regulated 5V power pad Provides regulated 5V power for low-current accessories. | racewire-led-strip racewire-led-strip power input (5V) led | Pad confidence is medium; verify against the manufacturer diagram before soldering. | |
| ground | GND Accessory ground pad Provides the ground return for powered accessories. | elrs-nano-rx elrs-nano-rx ground return receiver | Pad confidence is medium; verify against the manufacturer diagram before soldering. |
GND Accessory ground pad Provides the ground return for powered accessories. | analog-smart-audio-vtx analog-smart-audio-vtx ground return vtx | Pad confidence is medium; verify against the manufacturer diagram before soldering. | |
GND Accessory ground pad Provides the ground return for powered accessories. | analog-micro-camera analog-micro-camera ground return camera | Pad confidence is medium; verify against the manufacturer diagram before soldering. | |
GND Accessory ground pad Provides the ground return for powered accessories. | m10-gps m10-gps ground return gps | Pad confidence is medium; verify against the manufacturer diagram before soldering. | |
GND Accessory ground pad Provides the ground return for powered accessories. | racewire-led-strip racewire-led-strip ground return led | Pad confidence is medium; verify against the manufacturer diagram before soldering. |
Wiring checks
5-inch analog with full accessories
Receiver, analog video, GPS, buzzer, and LEDs all claim pads before the checklist clears.
- Board image needs verificationNo verified silkscreen image is available for this FC.
Digital video with receiver and GPS
Digital video reserves an MSP UART pair while serial devices still need clean pads.
- Board image needs verificationNo verified silkscreen image is available for this FC.
Too few UART pads
The wiring plan stops before drawing when serial accessories outnumber matching FC pads.
- GPS pad assignment is blockedNo available FC pads satisfy uart_tx, uart_rx for m10-gps.
Pre-power checklist
- Verify board orientation against the manufacturer diagram before soldering.
- Confirm XT60, ESC VBAT, FC VBAT, and GND polarity before soldering the battery lead.
- Install the low-ESR capacitor with the stripe on the ground side and leads as short as practical.
- Continuity-check VBAT to GND before connecting any LiPo power.
- Confirm the 5V and 9V accessory loads stay inside the FC regulator ratings before powering video, GPS, buzzer, or LEDs.
- Use a smoke stopper or current-limited bench supply for first LiPo power-up, then disconnect immediately if it trips, heats, smells burnt, or shows abnormal LEDs.
- Power from USB first when possible, then confirm receiver, video, GPS, buzzer, and LEDs one at a time.
Motor and ESC path
The first checks cover FC-to-ESC harness orientation, motor output order, telemetry availability, and bidirectional DShot readiness.
- Harness pin 1 orientation is verified
- Motor signal order is recorded
- ESC telemetry is assigned only when supported
UART and protocol path
Receivers, GPS, VTX control, HD MSP DisplayPort, and ESC telemetry compete for serial resources on the flight controller.
- Receiver protocol has a UART
- VTX control protocol has a port
- GPS does not collide with MSP DisplayPort
Video path
Analog and digital builds have different pad, connector, voltage, camera, and antenna constraints.
- Camera ecosystem matches VTX
- Antenna connector or adapter is known
- Video power source is supported
Wiring output should include
Input
Active Build Lab selections plus known fit facts.
Output
Pad assignments, conflicts, and a pre-power checklist.
Safety gate
Unknown power or UART facts block confident output.