MAIANA ™: The Open Source AIS Transponder

Fig.MAIANA AIS transponder transmitting and receiving part with fixed antenna (Open Marine)

Peter Antypas self-built an AIS class B receiver / transmitter and presented it on Github:

https://github.com/peterantypas/ais_transponder

functionality

The device combines the following functions:

  • AIS class B receiver / transmitter
  • 161.975 MHz (channel 87B), 162.025 MHz (channel 88B)
  • 2W transmission power
  • Silicon Labs 4463 transceiver ICs
  • STM32L412 microcontroller 80MHz
  • GPS Quectel L70R module, ceramic SMD antenna (for your own location transmission)
  • 3.3V UART output at 38.4Kbps
  • NMEA0183 data telegrams
  • Update rate 1 Hz
  • 12V / 30 mA
  • Disclosure of construction documents and the Software on Github

The AIS transponder consists of a transmitting and receiving part with a permanently attached antenna, which is connected to an adapter box via a shielded cable.… Continue reading

AIS Radar Pro

AIS Radar Pro receives the AIS messages from the connected AIS receiver (receiver), decodes the information contained and displays them graphically and in text form. From the position and speed data received, AIS Radar determines possible collision opponents, the distance in nautical miles and minutes to the closest approach to the collision opponent, as well as the location and time of a possible collision. AIS Radar Pro follows the simple RG Marine principle: Anything RED is dangerous.… Continue reading

DIY ultrasonic level measurement

Fig.: Ultrasonic level measurement

The idea of the level sensor arose from several sailors in the sailing forum. Andreas built a prototype and tested it on various objects. A simple replica is possible by using ready-to-buy modules. The ultrasonic sensor records liquid levels in a tank and sends NMEA0183 telegrams to the on-board network via WLAN. These can then be visualized in AVnav or OpenCPN, for example.… Continue reading

DIY water treatment

Source: www.linguine.eu

Caused by the corona crisis, many sailors could not use sanitary facilities and access clean water for showering or washing dishes. It was created in a Discussion in the sailing forum from PePeSail a solution for the water treatment of surface fresh water as found in inland areas in lakes or rivers. On the homepage www.linguini.eu he introduced the system in more detail.… Continue reading

LoRa boat monitor

First of all, a few important notes that you should definitely pay attention to.

https://www.segeln-forum.de/thread/74840-lora-monitoring-und-alarmserver/

https://github.com/norbert-walter/LoRa-Boat-Monitor

The LoRa boat monitor is used to monitor the boat when you are away. Various measured values are transmitted continuously at freely adjustable time intervals via LoRa radio technology (long range) to the LoRaWAN forwarded and recorded. The data is sent from the TTN server V3 (The Thinks Network) received and cached in Ireland for Europe and then to Ubidots forwarded as web frontend.… Continue reading

AvNav navigation software

First, a few important notes that you should definitely observe.

OpenSource chartplotter www.wellenvogel.net
  • completely web based navigation software for boats
  • raster chart display (tile based) like Google Maps
  • runs as server on a raspi
  • also available as standalone android app
  • features
    • use small devices like tablets or cell phones for navigation
    • optimized for devices starting at 7"
    • perfectly usable on 10" devices see here
    • attach your sensors via USB, serial, bluetooth, TCP - also possible on android (GPS, wind, speed, depth,AIS)
    • using NMEA0183
    • integrated NMEA multiplexer and WLAN gateway
    • usable for NMEA2000 with canboat
    • track logging
    • route planning
    • using raster charts (BSB,NV, downloaded charts from mobile atlas creator)
    • simple installation
    • small, low power consumption
    • display adaptable(sizes via settings, free configuration what to display where)
    • can be extended and adapted (server plugins, css adaption, java script for own displays)

Left

Different Set Ups

  1. “Classic” setup – Raspberry Pi installed in the boat, plus one or more tablets for display and operation.
... Continue reading

DIY Tiller Pilot

  • Restart 08/2018
  • other Projects
  • Standby since 09/2019
  • currently no further activities, as problems of the sensor calibration have not been solved satisfactorily
  • current approach distribution:
    • AHRS 9-axis digital sensor (compass, gyro, acceleration sensor)
    • ESP32 controller unit (possibly a combination of fuzzy control / classic control algorithms)
    • Actuator industrial linear unit
  • Status: Tests on the position sensor AHRS (Altitude and Heading Reference Sensor)
  • Most projects are still in the concept development phase
  • There are currently three projects working on the topic:

https://www.segeln-forum.de/thread/69164-pinnenpilot-diy/?pageNo=1... Continue reading

DIY board controller

The on-board controller monitors and controls the energy system of a yacht

Development goals

  • Increase in operational safety
  • Increase in the battery life
  • Fast charging of the batteries

Increase in operational safety

By displaying the accumulator states, the operator is informed at all times about the availability of the accumulator system. An age-related defect in the accumulator can be diagnosed by a constant decrease in capacity, so replacing the accumulator should be planned in good time.… Continue reading