Monday
Mar032025

Net Work (1996 - 2025) goes full circle

Signing off for now

My original Information Superhighway - a telephone extension reel to connect up my modemSince 1996 I've written the monthly 'Net Work' column for Practical Electronics magazine, and I believe it's become the longest running, most widely-read magazine feature of its type.

Net Work started at a time when the Internet and Email were still relatively new, and going online meant mastering lots of technical aspects. So I started with the basics, and mentioned interesting-looking FTP and web sites (when web sites were few and far between). In between times, I produced some constructional projects and co-wrote several tutorial series.

My column would go on to cover all manner of PC and home computing, smart meters, electric vehicles and space programmes. There has never been a shortage of topics to cover, and thanks to the web, there has never been more information for me to digest either.

After almost 29 years of uninterrupted publication, I'm now ready to stand back and take time off from Net Work, so the April 2025 column is sadly the final one in the series. I've come full circle, so in the April '25 issue I reflect on how I started with temperamental 14.4k dial up access, all the way up to ~1Gbps fibre-to-the-premises that arrived at the end of 2024. I also describe how the Internet evolved from the 1990s up to the present day, when it's become an essential utility for pretty much everyone.

A summary of each month's Net Work magazine column can be found on the PE web site Net Work blog though you'll have to read the magazine itself for full details. :)

I've enjoyed working for over fifty years in the hobby/ semi-pro/ educational electronics publishing sector, and I'm grateful for all the support I've enjoyed from the title's founders and publishers (IPC Magazines Ltd. of London, Wimborne Publishing Ltd. and Electron Publishing Limited).

Practical Electronics is now in the safe hands of Silicon Chip Publications in Australia who are working very hard to bring readers their favourite magazine title every month.

I'm still hoping to write occasional articles through the year, covering the latest trends heading our way, as well as offering handy hints and tips to help readers get the most from current technologies. My many thanks go to all those regular readers who say that Net Work is the first column they turn to, and they enjoy reading about some of the latest technological developments that are looming over the horizon.

Wednesday
Feb262025

This operation has been cancelled due to restrictions on this computer.

One day, and without warning, my version of Microsoft OneNote 2007 popped up with an error message:
"This operation has been cancelled due to restrictions on this computer. Please contact your system administrator."
This happened whenever I clicked on a hyperlink. Normally my Firefox web browser would launch, but I started getting this error instead. It also happened with Microsoft Word documents, but not with certain other programs. After a huge amount of research, trial and error, and not wanting to re-install any software, the error was soon solved as I'll explain.

Click to read more ...

Sunday
Sep222024

Sanyo VPC-G210 digicam - PC connection

This article's about sorting out the Sanyo VPC-G210 Digicam PC Serial lead pinouts. Trying to download camera images direct to a PC, I found that a generic PC serial lead (DB9 to 2.5mm 'stereo' plug) I'd sourced online didn't work - the camera wouldn't communicate with my PC's COM1 serial port. I also run through the MGI PhotoSuite SE/ Sanyo PC software.

Click to read more ...

Monday
May272024

Remembering the S-Dec Solderless Breadboard

This is a celebration of the S-Dec and T-Dec solderless breadboards from the 1970s, the first of their kind in Britain. My hobbyist years will forever be indebted to them, so I trace some history and present some contemporary ads. and photos of them.

Click to read more ...

Tuesday
Apr302024

What are those diamond marks on steel tape measures

A selection of steel rulers designed for the UK andf US markets [click to see]Have you ever wondered what the strange diamond markings are that appear on steel flexible tape measures? They seem to be placed in an odd position, without explanation, somewhere near the 19” mark. Some tape measures have extra symbols placed at the 16” mark for some reason.

Most steel tape measures sold in the UK are made in China and are therefore sold on the USA market as well.

The diamond marks sometimes seen at 19.2”, 38.4” etc (i.e. every 19.2”) are for the UK market: in actual fact they enable tradesmen to accurately measure the centres of joists that will carry standard 8’ sheets of plywood, or maybe plasterboard.

Joists on 19.2" centres will carry an 8' board perfectly [click to see]Above I sketched how an 8’ sheet of ply will span six joists, if each one is centred every 19.2”. As five spaces measure 19.2” each, that totals up to 96” or 8’. (There are six telegraph poles, but only five 19.2" gaps, as my maths teacher might once have said.)

Something tells me metrication of modern materials has probably messed up this idea anyway.

My photo above shows a selection of steel tapes from my workshop. The centre one has a diamond at 19.2” for UK tradesmen, while some of them also carry black diamonds with numbers in a red box at [16]  [32]  [64]  [80]  etc – this is aimed at the US market instead, for measuring stud walls every 16”. Apparently the UK standard is 400mm centres instead, slightly different, so those marks are ignored. So now you know!

 

Sunday
Apr212024

Exploring Sanyo Digicam Multi Shot ‘movie clips’

I unearthed my early Sanyo VPC-G210 photos and discovered a few ‘multi shot’ photos taken at the time (1997-98), so I decided to see what I could make of them today. Each Sanyo multi shot image contains 16 sequential pictures, tiled 4x4 into a single 640 x 480 pixel JPEG. So each ‘frame’ is a mere 160 x 120 pixels and movie clips last 1.6 or 3.2 seconds. I've also been experimenting with manipulating them and making a serial lead to download onto a compatible Windows 98 PC.

Click to read more ...

Thursday
Apr182024

Sanyo VPC-G210 digicam – the start of something big

The Sanyo VPC-G210: it’s 1997 and the evolution of digital cameras continues unabated, as manufacturers try to cram more pixels into pictures to produce better quality images. Since the earliest LCD consumer camera first appeared, the 1995 ¼VGA Casio QV-10 that I describe elsewhere, digicams were jostling for position with film cameras and there’d be an insatiable demand for higher resolution, more memory, faster operation, improved battery life and more camera-like features and controls.

Click to read more ...

Friday
Mar292024

Celebrating the Casio QV-10 – the world’s first consumer digital camera with built-in LCD

‘What to do today?’ was one of my dad’s daily musings, and while pondering the same thing myself, I remembered that I’ve got a vintage digicam that I wanted to re-visit and explore. So this item is dedicated to the Casio QV-10, which nearly 30 years ago heralded a radical change in the way consumers would enjoy photography in the future.

Click to read more ...

Monday
Mar182024

Zenith Flashmatic - the first TV remote control

The Zenith Flashmatic was a flashlight-powered opto TV remote controlThe Flashmatic was the first TV set to offer a remote control, and it was operated using a raygun-like device that was basically a torch (flashlight).

Aiming it at one of the four corners of the TV would turn the set on or off, mute the sound (TV commercials were annoying even back then!), or it could change the channel - a photocell circuit operated a motor that turned the channel selector turret tuner clockwise or anti-clockwise, no doubt with a satisfying clunking and clattering sound.

It was a nuts valve (vacuum tube) design that was destined to fail, because it proved all too easy to trigger using false beams of light (eg sunlight or reflections). Next came sonic-operated TVs, that had a mini-chime bar type of remote control. Different frequencies triggered different functions on the TV. A 'clicker' type of remote device was also marketed.

The original Zenith Flashmatic circuit diagrams and manual (PDF 9MB) can be downloaded here.

  • A BBC news item in May 2012 reported the passing of the Flashmatic TV remote control inventor, Eugene Polley who died age 96. Learn more...

Sunday
Feb182024

EMT757 Programmable Digital Timer User Guide

EMT757 programmable TimerAt last, here’s the instruction manual they left out of the box! I've written an easy-to-read and comprehensive guide that explains how to use the popular EMT757 time switch.

The EMT757 timer has been sold for many years, previously in the UK by B&Q under the Everflourish brand, and currently under the ExtraStar brand found on Amazon. Clas Ohlson also sells it under their Cotech label.

It’s a versatile 7-day time switch with 20 individual on-off programmes, a countdown timer that switches on/off after an elapsed period, and a random burglar-deterrent function.

I’ve used them for many years and have got to know them very well. The problem for many users is that the digital display and buttons are pretty small, and the supplied generic instructions take a bit of digesting, hence I’ve written this comprehensive guide to make life easy for those who might be struggling with this popular timer.

  • Free download - EMT757 Time Switch User Guide (PDF) here
  • You can buy the EMT757 from Amazon [Affiliate link] here

The above Amazon Affiliate link(s) help towards the cost of running this web site.