Introduction In recent posts I have been looking at using my new GNSS receiver on various maps such as OpenStreetMap, OpenCPN and operating systems such as Windows & RaspberryPi (Ref.1/6). Since the icebergs and polar bears have left Toronto Harbour, I thought it would be fun to do a spring fix with GNSS and AIScatcher.… Continue reading GNSS Spring Fix
Category: Navigation
Navigation: Celestial, Sextant, Equipment
ICM20948 9DOF IMU on RaspberryPi4B
Introduction In the previous post I looked at using the ICM20948 9DOF IMU with Arduino Uno (Ref.1). In this post I examine the IMU with RaspberryPi4B using Python. In order to test the IMU, I am using a protoboard with on board voltage regulator (Ref.2). The ICM20948 contains two dies on a 3x3mm package: an… Continue reading ICM20948 9DOF IMU on RaspberryPi4B
ICM20948 9DOF IMU on Arduino Uno
Introduction In previous posts I looked at using the GY-91 as a sensor board for OpenPlotter (Ref.1). This board included an MPU9250 9DOF IMU with a BMP280 temperature/pressure sensor. The MPU9250 stopped being manufactured circa 2018 and the ICM20948 is the suggested replacement. In this post I look at using an ICM20948 proto board with… Continue reading ICM20948 9DOF IMU on Arduino Uno
OpenPlotter4 on RPi4 – AIS/GNSS/Sensors
Introduction In previous posts I looked at OpenPlotter2, then recently OpenPlotter3 (Ref.1/6). I looked at various aspects including GPS, AIS, WeFax, Navtex and Sensors. In this post I will look at OpenPlotter4 on RPi4 with AIS, GNSS and Sensors. Installation Figure 2 shows the OPV4 starter image which I downloaded from Ref.7. Then I used… Continue reading OpenPlotter4 on RPi4 – AIS/GNSS/Sensors
Magnetic Anomaly Detection
Introduction In a previous post I reviewed magnetic navigation and my personal experience using various compasses and magnetometers (Ref.1). In this post I will examine a different magnetometer the Melexis MLX90393. Recent aerial activity of anomalous vehicles suggests that having a method to measure magnetic fields is important. These craft cause all electrical activity to… Continue reading Magnetic Anomaly Detection