Diagrams
Electronics
Layout
CAN
Power
Pi A
Pi B
VESC A
Central
em-trak
Release B
Aft
Wing
Ewellix
Transom
BMS
Battery
<- Electronics
Central node
Control bus - Nucleo G431 - GitBoat A3 - steering drive out
Box power from house/main branch.
24 V
Onto the Control backbone.
CAN C
Two trunks to the transom terminal.
Release
Five 16/2 duplex runs to the aft junction.
Loads
12 AWG power + position lead to Ewellix.
Steer
From aft junction (wind, encoder A).
Sensors
COMPUTE
Team-built brain on the Control bus.
Nucleo G431
screw carrier
Drop onto Control with Taidacent DIN-rail surge.
CAN + surge
Taidacent DIN
16 I2C outputs for convenience only.
MCP23017
convenience I/O
Pi A is on the same Control backbone.
Control bus
Pi A
RELEASE
First key of the two-condition release vault.
Enable relay
Horn A drogue lids + JSD actuators 3-6.
MOSFET channels
horn A - JSD 3-6
SWITCHED LOADS
Switched loads + charge-continue bypass.
8-ch relay module
Starlink - AIS NC - science
motoring - bilge - bypass ch8
STEERING (OFF BUS)
De-energized CLOSED so a dead node keeps the Ewellix fed.
Power-cut
de-energized CLOSED
24 V H-bridge / reversing pair for Ewellix - not on CAN.
Reversing drive
Ewellix CAHB-22
SENSORS / INPUTS
Two Water Witch pump states.
Opto board
Water Witch x2
Calypso UART + rudder encoder from aft trunk.
Wind + enc A
from aft trunk
Barometer + humidity on I2C.
BME280
Pack (six) + compartment 1-wire.
DS18B20
pack + bay 1-wire
CANH
CANL
power
GPIO
UART
I2C
off-bus 24 V