Entries by Alan W (135)

Tuesday
Feb112014

Homebase circular mirror woes...

Typical 40W 40cm Circline fluorescent tube (click to enlarge)How hard can it be to replace a 40W circular fluorescent tube these days? Anyone would think they were obsolete. In this article I outline choices in colour temperatures and suggest a great source of replacement tubes.

I struggled to find a new one but eventually a couple of tubes were ordered online and delivered in a day or two. As I explain, different colour temperatures enable you to choose the best light suited to your needs.

But this Homebase mirror was even more complicated to fix, when I had to source a new inverter as well, as you can read in http://alanwinstanley.squarespace.com/consumer-stuff

 

 

Wednesday
Jan292014

Bletchley Park's Turf War

Bletchley Park – the once top-secret British home of world-beating WWII German codebreaking that saved countless lives and helped end the war – looks like it’s about to be turned into an iPod-Touch powered tourist theme park sponsored by Heritage Lottery funds.

It’s great to see that the work of Bletchley Park is being made more attractive and accessible to today’s more sophisticated visitors so that our proud history can be kept alive.

Meantime the on-camp home of Colossus, arguably the world’s first electronic supercomputer, rebuilt and housed at The National Museum of Computing (TNMOC ) in one of Bletchley Park’s blocks (H) next door, claims it’s being starved of through-visitors due to a turf war between them and Bletchley Park’s theme park owners.

A gate being built between the main Bletchley Park and Block H © TNMOCShamefully, The National Museum of Computing receives no UK government support for tending to Colossus, a rebuilt version of the WWII vacuum tube computer that enabled us to crack the Nazi codes.

Thanks to TNMOC, it’s possible to track the evolution of electronic computing from that top-secret era of WWII through to the mainframes of the 1950s, then onwards to the dawn of personal computing in the 1980s and beyond. TNMOC is desperate for funding and previous sponsors have includes the likes of IBM, HP and Google. Unbelievably, the Museum also has to pay Bletchley Park for rent and overheads.

On the Bletchley Park website itself, there are some very worthwhile educational resources http://www.bletchleypark.org.uk/edu/resources.rhtm  but there is only a churlish one-liner hyperlink to TNMOC under ‘Other Exhibitions’ at http://www.bletchleypark.org.uk/content/visit/whattosee/other.rhtm  which calls it “an independent museum tracing the development of the computer.  This museum is housed at Bletchley Park and charges its own admission fees.”  That’s it. Even the RSGB-run National Radio Centre there gets a more generous write-up. Otherwise I could find next to no mention of Colossus or Block H on the main Bletchley Park website itself.

I also squirmed when I saw on TV how an old-timer Bletchley Park volunteer was treated by the corporate suit responsible for firing him (thank you and goodbye, in effect) because he didn’t fit in to their plans for their forthcoming iTouch theme park. It was a PR disaster.

It takes a long time to get anything done here in England. While the Chinese can build an entire new high-speed rail network in a low number of years (it would take us decades), it’s only recently that the UK managed to build a visitor centre for the ancient collection of rocks that is Stonehenge, and that didn’t exactly go to plan when the £27 million centre opened.

Colossus being rebuilt at The National Museum Of Computing © TNMOCIn the West we pretty owe much our freedom to the likes of both Bletchley Park and the world-class codebreakers who used British computing expertise to crack the ‘unbreakable’ codes of the German Enigma machine. Much valuable work is done by unsung heroes and it’s a scandal that TNMOC should have to rely on handouts and industry-funding to keep their charity alive.

I find it particularly deplorable that TNMOC, which has much better things to do with its meagre resources, should find itself embroiled with what seems to be another war, this time seemingly a war of attrition with Bletchley Park itself.

Bletchley Park, funded by Heritage Lottery cash (ours) should be doing everything possible to support the fantastic work of TNMOC instead of carving up its crumbling but precious WWII encampment into a tourist theme park with some fenced-off attractions.

Links

TNMOC Statement

The National Museum of Computing

Bletchley Park

Wednesday
Nov202013

Basic Soldering Guide for Kindle now in Australia

Good news for readers down under, my Basic Soldering Guide Kindle Edition is now available for download from Amazon Australia. Remember, you don't need a Kindle tablet to read it as free readers for PC & Mac are available.

It's sponsored by Antex (Electronics), the leading UK manufacturer of soldering irons. Taking in feedback and questions from readers over more than 15 years, my guide has been totally rewritten and has 80+ new colour photos showing everything you need to get started in electronics soldering successfully.

Why not read a sample of the all-new Basic Soldering Guide now!

http://www.amazon.com.au/Basic-Soldering-Guide-Alan-Winstanley-ebook/dp/B00E8NEGAA

 

Wednesday
Nov202013

Energy Supplier Switching Fraud

UK businesses, especially start-ups, should beware of the latest fraudulent scam doing the rounds along the following lines.

You may be bombarded by unsolicited phone calls from a scammer claiming that your business doesn't appear to be "registered" and in passing they ask who your current energy supplier is. (Such people simply buy databases of new phone numbers and target the new owner.) The scammer may cite “credit history problems” at the previous address or with the previous occupants.

Hence, some time later someone phones up claiming to be from your current energy supplier. They spin a yarn saying that due to problems with your credit history (for example), you have to renew your energy deal and may also have to pay a deposit of say £500. The scammer puts you through to a "broker" who offers to "register you" with an energy supplier that doesn't need a deposit. You might find yourself put through to "utility meter registration".

Basically the scammers impersonate an energy broker, sign you up over the phone and they pocket their commission on the sale. Before you know it, you've been conned into switching to a more expensive supplier. The verbal contracts appear to be impossible to undo. I know of several firms targeted by this scam and unfortunately one fell for it.

As at November 2013 the supplier BES Commercial Electricity is putting out this warning:

WARNING: It has come to our attention that a fraud is being perpetrated regarding Security Deposits.
Customers of gas suppliers are being contacted by telephone by a purported representative of the supplier and have been asked to provide a Security Deposit when one is actually not required by the supplier. If you are contacted by an alleged representative of BES requesting such a deposit please would you take the details of the caller and then terminate the call without paying the said deposit. Please would you then call us directly to verify whether we have actually made the request? We thank you for your assistance as we wish to help to eradicate this fraud.

  • Also check this link:

http://www.thisismoney.co.uk/money/article-1695429/Small-firms-tricked-by-electric-switch.html

It seems impossible to reverse such a fraud and at least one small startup now has an energy deal he did not want or need.  If you have recent experience of this, please get in touch.

Sunday
Nov172013

WHSmith's greenwash...

WHSmith's meanest, tiniest polybag weighs 1.37 grams... (click to enlarge)I’ve been having fun with a set of digital scales designed for measuring tiny amounts, down to 0.01 grams. You can get them from Chinese gadget websites such as www.goodluckbuy.com  or www.ahappydeal.com for just a few pounds and they’re pretty impressive for the money.

Firstly, I couldn’t believe WHSmith charged me 1p. for a tiny (the smallest) thinnest rubbishy polythene bag for a small book costing £10.99, in a move that’s just pure lunatic greenwash.

So I set to work with my digital scales. They can measure to 0.01 grammes, so.... Smith’s tiny tot carrier bag weighed 1.37 grams, meaning that Smiths is penalising us to the tune of £7.30 per kilo or £7,300 per tonne.  I wondered if I got my money back when I recycled it. B&Q was as bad, charging (10p. I think) for a rubbishy recycled black polybag that had zero carrying capability and was only good for throwing away.

While in Smith's I noticed too how they want £66 (yikes, that's $100) for a set of HP 56 & 57 black & colour cartridges to fit my inkjet printer, when you can buy a whole new All-In-One for that. Is that intended to stop us buying inkjet cartridges? I bet they’re just flying off the shelves. Nor did they have the Yorkshire Post newspaper. Do we need a WHSmiths any more?

The next question I tackled was, approximately how many Hundreds & Thousands cake decorations are there in a standard 100 gram tub?

I tipped some 100s and 1000s onto the scales until they registered, and I got a weight of 0.16 grams. Turns out there were 143 of them. So 100 grams = 143 / 0.16 x 100 = 89,375 on average. I make that 1.1 milligrams each. A metric tonne would contain 893 million of them, which is a lot of cup cakes.

Wednesday
Oct302013

Readers' prototypes

Following the intermittent appearance of my ‘potted history’, regular reader and friend of EPE Thomas Stratford got in touch to say that he’d recently built a couple of my legacy electronic projects! Thomas’s projects include the Uniboards Touch Switch and more recently, the Continuity Test Unit. If you've tried any of my projects, it would be great to hear from you. Read more and see a slideshow...

Wednesday
Oct302013

Interview Part 5: Give me a break

It’s the mid 1980s and after my Digital Thermometer and Controller debacle (see part 4) I decided to keep things simple and try to re-establish a flow of smaller projects. You can download more free project reprints and see my notes about the actual prototypes used in the magazine. Read more...

Wednesday
Oct092013

Chinese Domain Name scams - beware!

Looking for details of the latest campaigns, and comments from other users? Please see my ongoing thread here.

Tuesday
Oct082013

Twin USB Mains Adaptor/ Charger with suppression

Masterplug Surge Protected Twin USB Mains Charger with pass-through mains socketI stumbled across this USB Mains Adaptor from Masterplug which boasts several handy features: firstly it has twin 5V 1,000mA USB sockets into which you plug your choice of USB lead, so you can charge two devices at once. Handily it also has a pass-through mains socket so you don’t lose the use of a mains outlet.

Unlike other chargers, this adaptor also has mains suppression to help protect your precious phone(s) from damage caused by e.g. motors, surges or the effects of lightning. Once a suppressor "blows" then the unit should be discarded.

It sports two garish LEDs indicating that power is on and the suppressor is intact. The unit is sealed for life and there is no accessible fuse carrier.

The Masterplug SRGAUSBPB (black) or SRGAUSBPW (white) Surge Protected Mains USB Charger is available from Amazon, Argos, B&Q, ebay and more for approximately £9.

Unfortunately, my first one failed because it wasn’t that good a fit and the earth pin got pushed inside! The replacement has been fine so far.

Startech USB Combi lead has mini and micro connectorsYou might also like the Startech USB Combo Cable – it’s a useful Mini USB and Micro USB to USB lead that you flip over depending on what size your phone needs.

The lead is available in black or white, see http://uk.startech.com/Cables/USB-2.0/Micro/3foot-USB-to-Micro-USB-and-Mini-USB-Combo-Cable-A-to-B~USBHAUBMB3. I also spotted it for sale on Amazon, but typical ebay seller prices were silly so don't pay over the odds.

Sunday
Oct062013

Interview Part 4: All the Muscle You Need!

Part 4 of my potted history kicks off with some more ambitious projects, starting with the Bench Power Supply of March 1981. You can download reprints of all my published project articles and read my background notes, as well as seeing photos of the original prototypes that still exist today, as well as one or two projects that were never published. Read more...