The workshop’s getting there (by alaric)

My good friend and colleague Andy came over to stay for a while, which meant I had 'entertaining a guest' as an excuse to do some of the fun stuff I've wanted to do for ages.

So we finished making the welding bench! I'd made the top and gotten part way through cutting the legs to length, so we finished cutting them and welded them in place, then welded extra flat strips around the bottom to make it reasonably rigid. It's all just tack welds, and it'll almost certainly need some diagonal struts added, but it stands upright and is surprisingly sturdy; I'm going to experiment with it a bit to see just how many more struts it needs. I'd also like to drill holes so I can mount my vice on it, too.

Then we cleared a space and moved my electronics workbench down into the workshop! This is great news, as it clears up space in the office (albeit revealing the piles of junk that were lurking beneath the bench), means all my tools are in one place (which is most convenient, as things were always in the wrong places), and creates more storage space in the little garage, meaning less stuff on the floor.

I've since reincarnated my power distribution rail, which I had when we lived in Ealing, but haven't used since; the idea being that it'd be good to do my electronics experiments on the end of a dedicated RCD so I don't trip the one in the house. It also splits the output into four circuits, each with a six amp circuit breaker (the smallest I could obtain easily).

I still need to get rid of a lot of waste cardboard that's sitting around, and we're still looking after Seth's motorbike, and there's still junk to be sorted - many things need to be elsewhere; the little garage isn't a place to store things we only use a few times a year, as we have the Big Yellow for that!

Although the lighting's not really good enough when I'm explaining the power rail, here's a quick video tour:

For my next trick, I'll stop procrastinating by building infrastructure, and get on with actually making myself a digital watch with an embedded ARM processor and colour dot-matrix LCD. Watch this space.

My trip to Silicon Valley (by alaric)

The fun starts as we go to board the plane. It turns out I've been randomly selected to be upgraded to Business Class, due to the overbooking system British Airlines uses. Jack, who I am travelling with, raises a fuss on board the plane that I was upgraded and he wasn't, as we were travelling together - so the cabin staff rearrange people a little, and pow, we're both in Business Class, sitting next to each other.

Jack certainly has the power of the Jedi Mind Trick.

It gets more fun when we arrive. I've booked a rental car, with Jack as a second driver. I chose the 'economy' option for the cheapest cars they have. The guy in the garage says "Economy? Pick any in this row, the keys are in them".

We debate between ourselves if he really meant "any" as in the row is a rather sporty-looking Ford Mustang. We decide to give it a try, as long as Jack drives to begin with. Sure enough, he uses his Jedi Mind Trick again on the lady controlling the exit gate... and there we are in a meaty sports car we've hired for a mere £120 for the week.

It's now about 6pm local time, and about 2am back home, so I'm pretty tired. But we find the hotel after a few harrowing run-ins with the differing conventions for traffic lights in the US, drop off our stuff, and head into Palo Alto to meet up with Cedric for dinner.

And then get back to our hotel room (all three of us are cooped up in one; thankfully in separate beds) at 11:30pm, which is something like 7:30am at home. I am TIRED. A quick shower, then to bed. Tomorrow we will go and sightsee...

My 30th Birthday Party (by alaric)

Thankyou to everyone who came!

And to everyone who sent me presents and good wishes from afar 🙂

The photos and videos are winging their way back; we'll link to them as and when we can.

I had a lovely time - I hope you all did, too. I'm overwhelmed by how lovely you all were!

Ada Lovelace Day: Barbara Snell (by alaric)

For Ada Lovelace Day I'm going to write about my aunt Barbara.

She's never been one to be arbitrarily limited by society - in the 1950s, she went and toured the world on her own; which was quite something for a woman in her early 20s to do!

She's retired now, but her career was in linguistics. In particular, she was a technical translator, translating equipment manuals from other languages to English; I've never obtained a full list of the languages she knows, but (from memory) all the main European languages, Russian, and Japanese have been mentioned.

Anyway, she happened to be working for Xerox when the job of translating some documentation relating to the Xerox Star came across her desk.

At the time, translators worked with typewriters; they'd type up a first draft of the translation, with lots of corrections pencilled in as they went along, as it's quite common to find you want to revise something you've already translated when you come to write a later paragraph. They would then have to type up a better copy incorporating the corrections; but this might then come back with amendments proposed by the marketing department or other stakeholders. So the translators spent a lot of time doing menial work.

So imagine Barbara's excitement when she read the manuals for an electronic word processor... So, never one to let convention stand in her way, she petitioned the management to let the translation department have some. This request was eventually fulfilled, and as she predicted, translation became a lot more efficient...

But Barbara continued to be vocal about the opportunities for computers to help with translation, driving developments within the company and starting a series of conferences on the use of computers in translation, which is perhaps why Xerox is considered "is the private company that has contributed the most to the expansion of machine translation"ref.

This was all about when I was being born, of course. But when, around 2000, Barbara retired and closed down her own translation business, I had the chance to take my pick of computer equipment as she was clearing out the office; I took away a 486 that became the home router - but I always wished I'd managed to claim her Xerox Star...

Circuits in Epoxy (by alaric)

Continuing from my previous experiments in epoxy casting, this time I decided to cast a circuit in epoxy, as that's my eventual goal.

So I made a test circuit with four LEDs and their series resistors on a large piece of stripboard, with unnecessarily long leads on everything and a few different orientations of components, in order to check whether shrinkage is an issue at the kinds of scales I plan to work at:

Then I mixed up some resin:

And poured it into a business card box and placed the circuit in. I chose the business card box since it looked like the same sort of plastic the proper moulds at resin-supplies were made of, and that's supposed to not stick to the epoxy:

Luckily, it seemed that the epoxy does indeed not stick to this stuff, as it came out easily, leaving a perfectly clear surface, with no damage to the electronics:

It's really weird to have one of my sloppily-made circuits that's completely waterproof and ruggedised:

We had to prop it up with one end out of the water so you can actually see that all the LEDs are lit, though:

I think I'll still need to experiment with silicone moulds, though - as I'm unlikely to find boxes of the right plastic in the precise sizes I want.