Welcome to my site containing mostly technical topics together with some rather eclectic subjects such as (historical) British Naval slang words and the words to 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.

I have significant experience of designing power electronic systems ranging from high power inverters, through to 250KA (250,000A) battery discharge systems. I also designed microcontroller systems to manage 4MW diesel-generator sets for speed (frequency) and voltage regulation. Latterly my career has developed in the management of computer systems and I specialised in large scale MRP-II systems together with finite-element analysis systems with a supporting expert system (AI) for decision support. I progressed as a senior engineer as a Group Leader using my wide portfolio of business and management skills. 

My ethos is to transfer as much of my knowledge to others as possible and to do this in the most easily understood way that I can; particularly avoiding ‘knowledge is power’ techniques or obfuscation that I see many people use. I do this through my microcontroller projects use the Arduino, ESP8266 and ESP32 devices, most of which are documented here for your use and reference. Code for all my projects can be found on the GitHub G6EJD repository. Providing it is not used commercially. it is all free to use but you must acknowledged me as the author.

I’m also a licenced Radio Operator with the callsign ‘G6EJD’ and have held this since 1981. I operate on following bands: HF on 80M (3.5Mhz), 40M (7.0Mhz), 20M (14Mhz), 17M (18.1MHz), 15M (21MHz), 12M (24.9MHz) and occasionally 10M (28MHz) together with VHF  2M (144Mhz) and UHF (440MHz). I operate (QSO) using most transmission modes of SSB, FM, AM, CW, PSK, QPSK, HELL, FSK, MFSK, SSTV and Olivia. I’m working towards the DX100 award that requires radio contact with 100 countries and so-far my country count is 85, so just 15 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 here: