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Run my testbed experiment

• 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 containers the HTTP2/TCP interfaces between network functions the NGAP/SCTP interface between the 5G gNodeB and
• Network layer security
  The exercises in this experiment will focus on security services offered at the network layer of the TCP/IP protocol stack. You will configure a network with a VPN tunnel, and then you will examine the extent to which you are protected from unauthorized eavesdroppers on network traffic, when you

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• 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 […]

AMSAT-UK

• UK School to Contact Space Station
  An ARISS contact is scheduled with students at Mrs Ethelston’s CE Primary Academy at Axminster Community Academy Trust, Lyme Regis, U.K. at 11:44 BST (10:44 GMT) on Wednesday April 17 on 145.800 MHz FM. Amateur Radio on the International Space … Continue reading →
• Belgium: 23 cm band Restrictions
  On March 27, 2024, Belgium’s regulator the BIPT published draft restrictions on amateur radio operation  in the 23cm (1240-1300 MHz) band. Belgium is believed to be the first country to propose restrictions on 23cm band operation following WRC-23 ITU-R Recommendation … Continue reading →
• BBC Great British Railway Journeys at SSTL
  Series 15 episode 4 of Michael Portillo’s TV show Great British Railway Journeys: Havant to Guildford, features Surrey Satellite Technology Ltd and Professor Sir Martin Sweeting G3YJO. To see the segment fast-forward 20 mins 30 secs into the show. Watch … Continue reading →

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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.

Baltic Lab

• DIY Spark Gap Transmitter
  This article plunges you into the mesmerrizing world of early radio technology through the assembly and analysis of a DIY spark gap transmitter. This project offers a practical insight into the fascinating dynamics of damped harmonic oscillators and explains charasteristics such the logarithmic decrement, decay rate, damping factor, q factor, and beyond. Prepare to spark […]
• DIY: Adjustable 30 kV High Voltage Power Supply
  High voltage power supplies can open interesting doors to research topics such as laser, x-ray, spark gap transmitters. And many other specialized niches. Unfortunately, laboratory grade high voltage power supplies are rather costly. Luckily, there is a much less expensive way to put high voltage experiments into the hobbyists reach. This article shows how to […]
• Diplexer with integrated Bias-T (Triplexer) for QO-100 and X-band microwave reception using LNBs
  This article shows how to build a simple Triplexer (Diplexer plus integrated DC Bias-T) for use with commercial TV LNBs for QO-100 or X-band microwave experiments. Introduction When using modified, commercial LNBs for reception of the QO-100 amateur radio satellite or X-band microwave experiments, it is necessary to pass a clock-reference signal, a DC supply […]