Blog

Python library to send data over RFM75 chip using FTDI boards

pavlot — Wed, 30 Nov 2022 22:31:06 GMT

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...(read more)

USING AN RTL-SDR DONGLE TO RECEIVE PICTURES FROM THE ISS

colporteur — Fri, 16 Jul 2021 15:10:22 GMT

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...(read more)

Building a poor man’s quarter-wave 433MHz antenna: Testing the antenna with ESP32 LoRa

gecoz — Wed, 15 Jan 2020 23:28:00 GMT

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...(read more)

Xmas Audiovisual Show

neuromodulator — Wed, 15 Jan 2020 11:56:00 GMT

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...(read more)

Lorra-Lorra-LoRa

paj — Wed, 15 Jan 2020 06:45:00 GMT

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...(read more)

Automating room light through sub-GHz frequency

shivamgpl8824tiwari — Wed, 15 Jan 2020 04:49:00 GMT

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...(read more)

ArduTrx with Arduino MKR

bernhardmayer — Wed, 15 Jan 2020 01:12:00 GMT

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...(read more)

Got mail! LoRaWAN Mail box sensor

eivholt — Tue, 14 Jan 2020 20:38:00 GMT

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...(read more)

Project to design RF friendly Switching Converters

station240 — Tue, 14 Jan 2020 05:40:56 GMT

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 -...(read more)

Building a poor man’s quarter-wave 433MHz antenna: Comparing Antennae

gecoz — Tue, 14 Jan 2020 00:56:00 GMT

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...(read more)

PDTect_RF Partial Discharge Detector

three-phase — Mon, 13 Jan 2020 21:16:00 GMT

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 ...(read more)

Arduino Mini RDF Fox

kmikemoo — Mon, 13 Jan 2020 04:57:00 GMT

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...(read more)

Building a poor man’s quarter-wave 433MHz antenna: Antenna’s construction

gecoz — Sat, 11 Jan 2020 22:16:00 GMT

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...(read more)

Building a poor man's quarter-wave 433MHz antenna: Introduction

gecoz — Wed, 08 Jan 2020 13:37:00 GMT

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...(read more)

NFC Lock — run with NFC Tag Antenna

fyaocn — Wed, 08 Jan 2020 04:30:00 GMT

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...(read more)