Navigation electronics
Couple pictures for reference:
Nav station deck.
Nav station deck with water and fuel gauges, secondary switch panel and 21" protected display.
electronics shown on the previous photo is behind the display. Display flips down to get access there.
Front side of the secondary switch panel.
Panel includes small 2.5" thermal printer to be able to quickly print current position, course information or anything in printed form.
Start point
All electronics installation I did year ago was done in "temporary mode" with flying wires, not organized. Just get it work for day sailing the lake. More for fun then actually needed.
Electronics was mounted on plywood board with velcro tape. Wires between fuse panel and Switch panel was total ratnest and it was impossible to remove switch panel for any maintenance without unscrew 15 wires from the fuse panel.
All electronics wad mounted w/o any protection from elements but conformal coating printed circuit boards. (which is not big issue in the fresh lake, but i plan to go to salt water at the end of the year)
How it looked before reorganizing and RPi5 installation
What you can't see here - is 3 USB to serial adapters and "weathersensors" on arduino board just hang on wires below the picture frame.
Work was done today
- Open-plotter electronics BOX installation.
- Adding connector in between the switch panel and rest of the system.
- Organizing all wires in between Switch panel and fuse box.
- Terminal Block installed to organize power connections to peripheral devices.
- Finished wiring to tanks gauges (2x water tanks and fuel tank).
- Connected coolant temperature sensors to engine monitor module.
- Installed drive shaft packing box temperature sensor.
- Connected engine monitor module to ground and alternator.
Little more details about several things:
Open-plotter electronics BOX installation on the boat
Ip68 plastic enclosure to protect most vulnerable Openplotter electronics from elements contains baseboard, Raspberry pi and HDMI display interfaces splitter. All connections done with IP68 connectors.
Baseboard, kind of RPi HAT board but big one and RPi mounted on it vs HAT board usially mounted on Raspberry Pi.
Baseboard provides protection for RPi interfaces to survive in hard marine environment and in case of mild atmospheric electricity discharge.
Note: Actually almost impossible to make direct thunderbolt protection for working electronics - cheaper to have spare set of electronics in Faraday cage box.
What is in the electronics box:
- Raspberry pi 5 - 8GB installed and mechanically secured, 40 pin connector.
- 2x USB 2.0 1x4 hubs, makes 8 high protected USB 2.0 ports with 2A power capacity from 2 USB 2.0 RPi ports.
- Maiana AIS support port (direct RJ45 connection for Maiana)
- IMU
- Weather sensor (Pypilot project based), baseboard includes barometric pressure sensor and interface for direct connection of the Davis Anemometer)
- Two galvanic isolated NMEA0183 interfaces.
- dedicated interface for Pypilot motor controller.
- RPi power control
- Remote physical keyboard interface, will be used to control Pypilot. (Software is not ready yet)
- Two USB 2.0 power ports.
- HDMI splitter - provides copy of the navigation desk screen image to cockpit screen.
Box connectors pinouts
Adding connector in between the switch panel and rest of the system.
Wires organized on the switch panel and 24 contact connector installed.
back view on installed switch panel.
Connector pinout
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