DIY keel sensor

 

https://www.segeln-forum.de/board194-boot-technik/board35-elektrik-und-elektronik/board195-open-boat-projects-org/p2190274-hubkielsensor-diy/#post2190274

 

Gerry from the german sailing forum has built a keel sensor to show the depth of a recoverable keel. In addition to the keel depth, the heeling is also displayed. The measurement data can be displayed via WLAN, for example in a mobile phone browser. The following components were used for the keel sensor:

  • ESP32 NodeMCU (WLAN-enabled microcontroller)
  • MB1043 HRLV-MaxSonar-EZ4 (ultrasonic sensor with narrow beam)
  • MMA8452 (3-axis gyro sensor for inclination display )
  • D24V10F5 (voltage regulator)

The whole thing can be set up quite easily on a breadboard. Circuit diagram tells you more about the wiring.