# FMUK66 Hardware Reference

- [Schematics and design files](/HoverGames/rddrone-fmuk66/schematics.md): Schematics and design files for the RDDRONE-FMUK66 Rev. D as well as previous revisions of the board.
- [Connectors and pinout](/HoverGames/rddrone-fmuk66/connectors.md): This section gives an overview of the location and pinout of the different ports on RDDRONE-FMUK66.
- [FMU power input](/HoverGames/rddrone-fmuk66/connectors/fmu-power-input.md): Details and pinout of the power input connector on the FMU.
- [FMU power module](/HoverGames/rddrone-fmuk66/connectors/fmu-power-input/fmu-power-module.md): The power module provides power to the FMU and has voltage and current sensors.
- [Servorail](/HoverGames/rddrone-fmuk66/connectors/servorail.md): The FMU has a servorail with six PWM outputs and a BEC input to power the 5V rail.
- [RC input](/HoverGames/rddrone-fmuk66/connectors/rc-input.md): Connectors for providing RC input from a RC receiver module.
- [GPS](/HoverGames/rddrone-fmuk66/connectors/gps.md): Pinout of the GPS connector on FMU side and on the side of the GPS module.
- [Micro USB](/HoverGames/rddrone-fmuk66/connectors/micro-usb.md)
- [Serial 1 / Telemetry 1](/HoverGames/rddrone-fmuk66/connectors/telemetry-1.md): Serial port meant for use with telemetry radios, or to communicate with a companion computer.
- [Serial 2 / Telemetry 2 / IRDA](/HoverGames/rddrone-fmuk66/connectors/telemetry-2.md): Pinout and schematic for the Telemetry 2 port, which can also be configured as IRDA or extra I2C bus.
- [External I2C bus / NFC](/HoverGames/rddrone-fmuk66/connectors/i2c-nfc.md)
- [External SPI bus](/HoverGames/rddrone-fmuk66/connectors/external-spi.md)
- [Debug interface (DCD-LZ)](/HoverGames/rddrone-fmuk66/connectors/debug-interface-dcd-lz.md): Debug interface pinout, schematics and technical details.
- [DCD-LZ breakout board](/HoverGames/rddrone-fmuk66/connectors/debug-interface-dcd-lz/dcd-lz-breakout-board.md): Breakout board that exposes the different interfaces from the DCD-LZ connector.
- [Analog-digital converters](/HoverGames/rddrone-fmuk66/connectors/analog-digital-converters.md)
- [CAN transceivers](/HoverGames/rddrone-fmuk66/connectors/can-transceivers.md)
- [Automotive ethernet](/HoverGames/rddrone-fmuk66/connectors/ethernet.md)
- [Ultrasound sensor](/HoverGames/rddrone-fmuk66/connectors/ultrasound-sensor.md)
- [Arming switch](/HoverGames/rddrone-fmuk66/connectors/arming-switch.md): The arming switch is a safety feature that prevents the drone from take-off while not activated.
- [Buzzer](/HoverGames/rddrone-fmuk66/connectors/buzzer.md): Buzzer for audio feedback.
- [Electrical fuses](/HoverGames/rddrone-fmuk66/electrical-fuses.md): The RDDRONE-FMUK66 includes three electrical fuses. They will blow when too much current goes through them, to protect the MCU and other components on the PCB.
- [Hardware errata](/HoverGames/rddrone-fmuk66/hardware-errata.md): During the development of the RDDRONE-FMUK66 (NXPhlite) several hardware issues were discovered and fixed in newer revisions. Boards send to HoverGames participants should NOT have these issues.