Liên kết hữu ích

  • MARTIN - G8JNJ - ECLECTIC AETHER - Adventures with Amateur Radio
  • Owen Duffy VK2OMD (ex VK1OD) - Good practical information relating to Electronics, Antennas, Feedlines, Baluns & just about everything else
  • Steve G3TXQ - Home of the Broadband Hexbeam and 1:1 Balun common mode impedance charts
  • Tom W8JI - Lots of practical antenna information and theoretical analysis
  • Dan N3OX - Lots of antenna practical construction information (especially verticals) and theoretical analysis
  • Adam AB4OJ/VA7OJ - Excellent information relating to Icom Radios and associated items
  • Alan K0BG - Everything you will ever need to know about mobile operation and compact antennas
  • Phil AD5X - Lots of very interesting articles and construction projects
  • Ian GM3SEK - Lots of practical design info. Especially these pages on cost effective common mode choke design
  • Jim KY9C - Loads of design and measurement information relating to common mode chokes
  • Chuck W1HIS - More notes on ferrite common mode chokes. Showing what you need to do to reduce EMI problems
  • L.B Cebik W4ML (SK) - The best resource for antenna design and modelling (free but you need to create a login account)
  • https://re-ws.pl

RSS Run my testbed experiment

  • UAV-assisted wireless localization
    You've been asked to contribute your machine learning expertise to a crucial and potentially life-saving mission.A pair of hikers has gone missing in a national park, and they are believed to be critically injured. Fortunately, they have activated a wireless locator beacon, and it transmits a constant
  • Exploring the 5G RAN
    In this experiment, you will explore the 5G RAN by bringing up an end-to-end 5G network on a single server. You will see:how a 5G RAN can be split with the CU (centralized unit) handling SDAP, PDCP, and RRC layers, and the DU (distributed unit) handling RLC, MAC, PHY
  • Exploring the 5G core network
    In this experiment, you will explore the 5G core network by bringing up an end-to-end 5G network on a single server. You will see:how 5G core network functions can be deployed in containersthe HTTP2/TCP interfaces between network functionsthe NGAP/SCTP interface between the 5G gNodeB and

RSS Blog – Hackaday

RSS ZephrSec – Adventures In Information Security

RSS fetch( ); decode( ); execute( );

  • Running Blink Example on Raspberry Pi Pico
    Today, I managed to find some time to try out a Raspberry Pi Pico module that had been awaiting my attention at the lab for some months. More details about this module can be found in their website's documentation. The following are the steps that I followed to get their default LED blink example running […]
  • Fundamentals of Radio Tomographic Imaging - Part 1
    Nodes vs Links Consider a wireless network consisting of \(K\) number of devices. If each and every device is communicating with each other, there will be a wireless link between each and every pair of nodes. The number of such unique two-way links is depicted as \(M\). The following equation describes relationship between \(M\) and […]
  • Observing I2C Communication using Logic Analyser
    Figure: Connectivity between a master (controller) and slaves (target). (source: https://en.wikipedia.org/wiki/I²C)Inter-integrated circuit (I2C) protocol is an advanced protocol, that eliminates many weaknesses in the UART and SPI protocols to provide communication between ICs using minimum number of wires. I2C consists of just two wires interconnecting one or many master devices with one or many slave […]

RSS AMSAT-UK

  • IARU-R1 General Conference Papers
    Papers for the IARU Region 1 General Conference being held in Vienna September 19-23, 2026, are now available Among the papers is one in the VHF+ (C5) section titled VI26_C5_11 UHF Spectrum Situation submitted by the RSGB which mentions AST … Continue reading →
  • Amateur Radio at EMF Camp July 16-19
    Amateur radio satellites will feature at the Electromagnetic Field EMF 2026 event taking place July 16-19 at Eastnor Castle Deer Park, Eastnor, Ledbury, Herefordshire, HR8 1EN. Imagine a camping festival with a power grid and high-speed internet access; a temporary … Continue reading →
  • AST SpaceMobile to use 430 MHz band for 248 satellites
    On April 21, the FCC announced that AST SpaceMobile (AST & Science, LLC) will be using the Amateur 430 MHz band for 248 satellites in its planned Low-Earth-Orbit constellation which aims to provide global cellular broadband communications. Center frequencies are … Continue reading →

RSS Gough's Tech Zone

RSS Compass Security Blog

  • The Hidden Privilege of Automation Platforms
    Automation platforms such as n8n are often introduced as productivity tools: connect a few systems, automate repetitive work, maybe add some AI. Inside a corporate network, however, that framing is incomplete. A self-hosted workflow engine can reach internal systems, execute actions on behalf of users, and hold sensitive credentials. That puts it in the same […]
  • Cyber Resilience Act – Part II
    In this second part, we demonstrate how a Cyber Resilience Act (CRA) assessment is performed in practice. Using a low-cost IP camera as an example, we show how a product is classified, how threats are modelled, how hardware and firmware are analysed, and how compliance gaps against IEC 62443-4-2 can be identified. You may want […]
  • Cyber Resilience Act – Part I
    The Cyber Resilience Act (CRA) is a regulation introduced by the European Union to strengthen cybersecurity requirements for products with digital elements.In simple terms, the CRA sets mandatory cybersecurity rules for hardware and software sold in the EU. This includes everything from connected devices (IoT) to operating systems and even stand-alone software. Very important, this […]

RSS Nick Whyte

  • Ender 3 v2 Pen Plotter
    Last year I purchased myself an Ender 3 V2 3D Printer. It was a logical purchase, to compliment my home automation hobby, allowing me to design and print custom enclosures for miscellaneous ESPHome and Zigbee nodes. It turns out having a CoreXY 3D printer allows you to do more than just 3D printing if you’re […]
  • 100 Warm Tunas 2018 Prediction Analysis
    Over the space of 6 weeks, 100 Warm Tunas collected a large sum of data and chugged away at it to make some predictions about what the Hottest 100 of 2018 would look like. In summary, We collected 6,234 entries (13.6% decrease since 2017 🔻). We tallied 58,463 votes across these entries (12.9% decrease since […]
  • 100 Warm Tunas has a new home!
    100 Warm Tunas has found a new home this year! This year’s results, along with the past 2 years can now be found at 100warmtunas.com. The existing domain (100-warm-tunas.nickwhyte.com) will simply perform a 301 permanent redirect to the new domain, so all existing inbound links should be unaffected.

RSS Baltic Lab

  • Conducted Emissions on the Bench: Implementing the CISPR 25 Voltage Method
    This article pulls back the curtain on CISPR 25 conducted-emissions testing, demonstrating how a fully functional voltage-method setup can be built and operated on a standard lab bench. This approach shows how conducted emissions can be characterized with precision using accessible tools and a carefully structured setup, while walking through all critical elements needed to […]
  • WebP-Images without Plugin
    WebP is a modern image format which shines through its fairly small filesize. Google recommends through their PageSpeed Insights that all PNG- and JPEG-files should be served as WebP images instead. There are of course plugins to facilitate the automatic generation of WebP versions of existing images but a few lines of PHP code and […]
  • Firewall Rules with (dynamic) DNS Hostname
    Updating and installing new firewall rules on remote servers always comes with the risk of locking yourself out completely. Many server administrators have inadvertently lost access to their servers, including SSH access, at some point due to a moment of inattention. This article shows how to install a backdoor on your own server that can […]