Power Components And Assembly - Offset-official/Nautilus-One GitHub Wiki

Power Components and Assembly

This section is divided into several sub-parts.

Batteries

Parts

• XT-90 Connector
• 25A Blade Fuse
• Marine/Car Fuse Holder
• 14AWG and 22AWG wires

We are using 14.8V batteries with attached XT-90 female connectors. For each battery, we take a male XT-90 connector, solder 14AWG wires for each terminal, and connect a blade-fuse (25A) in series with the positive terminal wire. Then we route the wires through the relay-circuit for switching. For powering the buck, we route 22AWG wires from the XT-90 connection (either male/female).

Inter-Enclosure Power

We use 6 of the 8 bit RJ45 wires for transferring power and signal between the two hulls. We use 2 bits to transfer the relay-circuit signal from RPi Hull to the Nano Hull. We use 2 x 2 bits to transfer PWM signals from RPi to the thrusters connected to the Nano Hull.

We use male-female crimp-terminals to keep the connections modular.

Buck/Transformer

• We use a standard adjustable buck for the relay circuit. You can also use a fixed 5V buck to reduce space.
• The positive connection from the buck to the relay is routed through the Killswitch.

Killswitch

We use the Blue Robotics Killswitch. Since it is not rated for high-current, we are prompted to use a Relay Circuit for switching.

Relay Circuit

// TO DO

PDB

// TO DO