Introduction Recently I revisited OpenPlotter after a two year interval to see what had changed in the latest version 3 (Ref.1). I tested the Starter and Headless images and setup AIS & GPS on OpenCPN. In 2021 I had looked at various aspects of version 2 (Ref.2/12). In this post I will look at the… Continue reading OpenPlotter3 – Sensors_a
Author: Jeremy Clark
Jeremy Clark is a Senior Telecommunications Engineer and Advanced Amateur Radio Operator VE3PKC. He is the author of E-Books on Telecommunications, Navigation & Electronics.
GNU Radio Embedded Python Block for RaspberryPi4 GPIO
Introduction In many previous posts I have examined the use of the RTL-SDR with GNU Radio and on RaspberryPi4 (Ref.1/5). The combination makes an inexpensive, simple and rugged platform for the reception of a variety of signals. Figure 1 shows a typical implementation. The RTL-SDR is used to receive a Marine Weather signal at 162.4MHz… Continue reading GNU Radio Embedded Python Block for RaspberryPi4 GPIO
OpenPlotter3 Headless For GPS & RTL-SDR AIS on RPi4
Introduction Recently I was asked a question about AIS & OpenPlotter. I looked at various aspects of OpenPlotter2 several years ago (Ref.1/11) so I thought it would be a good idea to revisit the latest version3 of the Program. I downloaded RPi4_32bit images for Starter & Headless. Starter Image Setup I first downloaded the RPi4_32bit… Continue reading OpenPlotter3 Headless For GPS & RTL-SDR AIS on RPi4
Celestial Navigation – Spring Fix
Introduction Last week in Toronto the weather turned from Siberian winter to balmy spring. So I decided to head down to Harbourfront with my sextant and take some measurements. I have covered all the basics of CelNav in previous posts (Ref.1/9). Remember one bad solar X flare and we are back to slide rules &… Continue reading Celestial Navigation – Spring Fix
Si5351 Clock Generator I2C
Introduction In two previous posts I looked at programming the Si5351A clock generator with the Arduino (Ref.1/2). In this post I examine the I2C bus used for communication between the Arduino and Si5351A module. Using a digital scope, the bus can be decoded to compare the program instructions with what was actually sent for trouble… Continue reading Si5351 Clock Generator I2C