Welcome to my site of mostly technical topics together with some rather eclectic subjects such as historical British Naval slang words and the words of British National Airs!

Educated in Electronic Engineering and a Chartered Engineer, I specialise in power and microcontroller electronics and have a wide ranging knowledge of these topics together with radio communications. For those who know of him or have read his books, I was tutored in my subjects by Professor Douglas Lewin.

My ethos is to mentor, encourage and transfer as much of my knowledge to others as possible and I try to do this in the most easily understood way; particularly avoiding ‘knowledge is power’ techniques or obfuscation as used by many.

I have provided a collection of information to assist you in your learning and augment this with practical microcontroller projects using the Arduino, ESP8266 and ESP32 devices, most of my projects are documented here or there are supporting YouTube videos for reference. Software for my projects can be found on the GitHub G6EJD repository, it is free to use, but must not be used commercially and you must acknowledge me as the author.

My experience covers the design of power electronic systems from high power inverters, through to 250KA (250,000A) battery discharge systems. I have designed microcontroller systems to control 4MW diesel-generator sets to maintain frequency and voltage and latterly I have specialised in computer system management and large scale MRP-II systems. I have also implemented finite-element analysis systems with a supporting expert system (AI) for decision support. As a senior engineer in the role of Group Leader, I use my wide portfolio of business and management skills to manage people and projects to achieve a successful outcome. 

Licenced as a Radio Operator, I have the callsign ‘G6EJD’ which I have held since 1981, I operate on the HF bands and occasionally VHF and UHF. I’m working towards the DX100 award that requires radio contact with 100 countries and so-far my country count is 90, so just 10 more to go!

These pages are provided by a Raspberry Pi 4 running the Apache web server.

All my work and YouTube videos are self-funded, so if I’ve helped you, please consider treating me to a cup of coffee at my favourite café via PayPal, this also helps me maintain my feed of YouTube Technical videos by purchasing equipment. You can make a donation by clicking on the icon here: