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17 lines
1.2 KiB
Markdown
17 lines
1.2 KiB
Markdown
# Power Systems
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UAVs require a regulated power supply for the flight controller, along with separate power for the motors, servos, and any other peripherals.
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The power is usually supplied from a battery (or batteries), though generators and other systems can be used.
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Power modules are commonly used to "split off" a regulated power supply for the flight controller and also measure the battery voltage and total current consumed by the vehicle.
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PX4 can use this information to infer the remaining battery capacity and provide low-power warnings and other failsafe behaviour.
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A Power Distribution Board (PDB) may be used to simplify the wiring for splitting the output of the battery to the flight controller, motors, and other peripherals.
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PDBs will sometimes include a power module, ESCs for motors, and a battery elimination circuit (BEC) for powering servos.
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PX4 can also receive more comprehensive battery/power-supply information as MAVLink telemetry instead of using a power module.
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Batteries that can _supply_ MAVLink information are sometimes referred to as "Smart Batteries" (this definition is open for debate).
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- [Power Modules/PDB](../power_module/index.md)
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- [Smart/MAVLink Batteries](../smart_batteries/index.md)
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