Blog

Python library to send data over RFM75 chip using FTDI boards

pavlot

I'd like too share with community pyRFTdi Python library created to control RFM75 transmitters using FT232H boards. It allow to send receive data over air and could be useful for debugging radio communication and protocols. It is still in beta releas...
- 30 Nov 2022
USING AN RTL-SDR DONGLE TO RECEIVE PICTURES FROM THE ISS

colporteur

I thought I would share this link that was delivered to my mailbox yesterday. https://www.rtl-sdr.com/using-an-rtl-sdr-dongle-to-receive-pictures-from-the-iss/ Using the knowledge from the post, I watched the International Space Station (ISS) p...
- 16 Jul 2021
Building a poor man’s quarter-wave 433MHz antenna: Testing the antenna with ESP32 LoRa

gecoz

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 b...
- 15 Jan 2020
Xmas Audiovisual Show

neuromodulator

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 modul...
- 15 Jan 2020
Lorra-Lorra-LoRa

paj

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 allotm...
- 15 Jan 2020
Automating room light through sub-GHz frequency

shivamgpl8824tiwari

INTRODUCTION System block diagram System block diagram of the wireless room light control or in any security system system is shown. The project uses PIR motion sensors to detect motion and ASK-based radio frequency (RF) transmitter an...
- 15 Jan 2020
ArduTrx with Arduino MKR

bernhardmayer

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...
- 15 Jan 2020
Got mail! LoRaWAN Mail box sensor

eivholt

Update: Check out how a custom enclosure was 3D-printed www.youtube.com/watch www.youtube.com/watch 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 h...
- 14 Jan 2020
Project to design RF friendly Switching Converters

station240

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 www.youtube.com/watch Strange Bedfellows -...
- 14 Jan 2020
Building a poor man’s quarter-wave 433MHz antenna: Comparing Antennae

gecoz

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 a...
- 14 Jan 2020
PDTect_RF Partial Discharge Detector

three-phase

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 ...
- 13 Jan 2020
Arduino Mini RDF Fox

kmikemoo

As part of Project14 | RF (Radio Frequency): Win a Spectrum Analyzer for the Most Innovative RF Project!, I wanted an automated transmitter for my Antenna Radiation project. Amateur radio folks use such a device for "fox hunting", a radio dire...
- 13 Jan 2020
Building a poor man’s quarter-wave 433MHz antenna: Antenna’s construction

gecoz

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 op...
- 11 Jan 2020
Building a poor man's quarter-wave 433MHz antenna: Introduction

gecoz

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 ow...
- 8 Jan 2020
NFC Lock — run with NFC Tag Antenna

fyaocn

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, i...
- 8 Jan 2020
Antenna Radiation - Phase 3

kmikemoo

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 ...
- 6 Jan 2020
Antenna Radiation - Phase 2

kmikemoo

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. ...
- 4 Jan 2020
Star Wars®︎ R2D2 Uses the Force with XBee RF Virtual Wires

Sean_Miller

TABLE OF CONTENTS INTRODUCTION BILL OF MATERIALS THE QUEST FOR THE HOLY GRAIL - INCOGNITO R2 CONTROL R2D2 CONTROLLER DESIGN REQUIREMENTS XBEE RF TECHNOLOGY XBEE CONFIGURATION SCHEMATICS Handheld Transmitter: Microcontroller Receiver: 3D PRI...
- 29 Dec 2019
Antenna Radiation - Phase 1

kmikemoo

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 1 of testing antenna radiation patterns. ...
- 29 Dec 2019
PlanetCatcher: Building a World-Band Radio Receiver

shabaz

Contents Contents Introduction Receiver Technology Design Overview PCB Layout AM RF Path FM RF Path TEF6606 Schematic Volume Control Off-Board Interface and Digital I/O Power Supplies Building the Wound Components Inductors Transformers Using ...
- 19 Dec 2019
Feather Weather

dougw

Introduction This super cool little project illustrates just how far the maker industry has progressed since the first Uno appeared. This tiny ESP8266 MCU module has the horsepower to run a QVGA color touchscreen while running a WiFi stack to acces...
- 18 Dec 2019
Antenna Antenna

Jan Cumps

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 a kit of TI-designed antenna designs, a small ...
- 15 Dec 2019
RpiRateTV Broadcaster your local RPTV Station

gam3t3ch

I have always enjoyed older technology and love vintage radios and TV's. This brings me to my project at first I thought lets make another radio but you know what that has been done so many times and then I thought doing something with SDR but once ...
- 2 Dec 2019
Field Strength Meter

kmikemoo

Today, I shift my focus to RF. As part of the November 2019 Radio Frequency challenge, I plan to test antenna radiation patterns. But I'm also cheap. So... I plan to do this with simple radio frequency detector circuits. Why n...
- 1 Dec 2019
Antenna Radiation

kmikemoo

Okay, so it's really antenna radiation pattern testing - but that isn't as catchy.Yes, there is modeling software and, yes, it is accurate. But nothing really beats a hard measurement. My objective is to validate antenna radiation patterns...
- 23 Nov 2019