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Electronics Navigation

OpenPlotter – Sensors_a

Introduction In previous posts we examined how to install OpenPlotter (Ref.1), how to connect a GPS receiver (Ref.2), how to connect AIS (Ref.3), and how to receive VHF (Ref.4). In this post we will examine how to connect & detect a sensor module such as the GY-91 which is referenced in OpenPlotter documentation. This module […]

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Electronics Navigation Telecommunications

I2C Programming & Scope Detection

Introduction Recently I have been working with various sensors such as a magnetometer, gyroscope and accelerometer for use in navigational systems (Ref.1). All these sensors are accessed using the I2C protocol. Over the past several years I have worked with various HF synthesizers that were also programmed via I2C. I used a Tektronix TDS210 digital […]

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Electronics Navigation Telecommunications

Splat! – Marine VHF Propagation

Introduction In a previous post, I discussed how to use the Friis equation to determine the free space loss and receive level between a transmitter and receiver (Ref.1). Let’s consider an example that I saw in a recent sailing forum. The discussion was around the range of a typical marine VHF transmitter using a quality […]

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Electronics Navigation Telecommunications

RTL-SDR for EPIRB

Introduction EPIRB or Emergency Position Indicating Radio Beacon Station is an emergency transmitting device that blue water sailors or explorers can use in case of distress. They have proven their worth over the years and are absolutely essential for anyone wanting to wander off the grid (Ref.1). At least 2000 people have been saved every […]

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Electronics Navigation Telecommunications

Grounding

As we ease CV19 restrictions in Toronto, it’s time to get outside and enjoy the summer. Today I decided to walk in nature or at least in the closest park. As I walk on the grass and earth, I can almost feel the tension of the past few months draining from my body. What a […]