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RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Programming ESP32 LoRa Boards Development Environment Setup The Transmitter The Receiver Testing the antennae Conclusions   After all the building and measuring, it is finally time to put the antenna to the test, using the ESP32 LoRa boards I have available. Th ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Introduction Construction Arduino Code Improvements Conclusions Introduction  Following on from the prod from Tariq that was sent in my goodies bag, this is my rather basic entry into the Project14 RF competition, which will allow me to check for the presence of p ...
paj

Lorra-Lorra-LoRa

Posted by paj Jan 15, 2020
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   I have it in mind that I would like to create two projects using point to point LoRa communication. The first and what this blog is about is to detect and report movement. The second is to report moisture content of the soil so I know when my allotment needs watering. Hopefully I will get ar ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   1. Motivation 2. FM transmitter 2.1 Transmitter Input 2.1.1 Alternatives 2.1.2 XADC 2.1.3 USB Virtual COM Maximum speed Buffer under- and overflow avoidance UART A different UART decoding approach 2.2 Transmitter output 2.3 Frequency modulation 2. ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   I received an Arduino MKR WIFI 1010 from element14 with a hint to the RF (Radio Frequency) contest. So I decided to dig out my ArduTrx project and update it to work with the Arduino MKR.   Background  The ArduTrx was originally described in these blog posts: ArduTrx - a 2-meter ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   What it is This will demonstrate how to make a mail box sensor that will last for years on small batteries so you will not miss any holiday cards or presents. Live dashboard.  Features How to select appropriate hardware for low-power devices Getting started with LoRaWAN and The Things ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll       Strange Bedfellows - RF and digital switching I was wondering how the Spread Spectrum option in some Computer Motherboard BIOS actually works, at the time I couldn't find an explanation. It sounded a lot like a FM modulator, only connected to some form of sweep or white noise g ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Helical Antenna Molex FPC Antenna Center Loaded Coil Antenna Small FPC Antenna Quarter-wave Monopole Results *Update on Molex antenna performance - 14/10/2020 Updated results   In the previous blog, I have built my quarter-wave monopole antenna, and mea ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   What is an Antenna? Monopole Antenna Design & Build Tuning the Antenna References     Let’s start by laying out the requirements for the antenna. Obviously, the first and most important is about the frequency it needs to operate. As I intend to use the a ...
14rhb

Plant Based Radio Set

Posted by 14rhb Jan 11, 2020
Forward Points (1) This is not a project entry, but reading the RF (Radio Frequency) I thought it was be an interesting article to paste in there. (2) My second point is, do not try this yourself. Watch it, find it interesting, discuss it below, but leave the idea there !   The Article In the UK it seems the trend for more things to be plant-based and there is no reason why this cannot continue into electronics. Whilst browsing the internet finding fun articles I found this interesting vid ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   After receiving the Molex antenna sample kit that tariq.ahmad kindly posted to me over a month a go, I have been thinking how to use it (or some of the antennae), and finally take part to my very first Project14 contest. Considering that I didn't own any RF instruments, and last time I dealt ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Thanks to Element14 community with all the swag gift and sincerely greeting. I would be my pleasure to share my test project for the new due-core M33 product from NXP theming RF.     NFC Lock 1. Brief The NFC tag reader works on 125kHz, if read tag via I2C match the authorize ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Phase 3 of testing antenna radiation patterns.  The intro to this journey is Antenna Radiation. Phase 3 will be to test a 2-element cardioid pattern.  This is formed when two 1/4 wave antennas are placed 1/4 wavelength apart and one is fed 90 degrees out of phase. I want to verify ...
RF (Radio Frequency) Enter Your Project for a chance to win a Spectrum Analyzer for the Most Innovative RF Project! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Phase 2 of testing antenna radiation patterns.  The intro to this journey is Antenna Radiation. Phase 2 will be to test a 3-element Yagi.  After measuring the 8 compass points (N, NE, E, SE, S, SW, W, NW), I will try to verify the shape of the forward lobe.   The original Ya ...