A stroll in the countryside (by alaric)

On Sunday, I was looking after Jean as Sarah was in Cheltenham to run a writing workshop thing.

So I suggested that we might go for a walk, and Jean liked the idea - however, she decided she wanted a LONG walk! So after some discussion, we set off for the furthest of the three pubs in the Parish, which is about three miles away, with a packed lunch and lots of water, and Jean's teddy bear, who she decided should come with us.

To my delight, Jean didn't tire and demand to come home; we made frequent stops to drink water, and sat down in some shade in the woods to eat our cheese and biscuits, but we pressed on cheerily, past some lambs:

Eventually we reached the Fostons Ash for some lemonade and crisps.

Then Sarah rang as she was on the bus home, which stopped off by the Royal William, the pub nearest our home - so we decided to walk straight there to meet Sarah, taking a different route, where we got a little closer to some of the lambs:

At the Royal William we ate a filling dinner of chips (not so unhealthy if you've been walking all day!), and came home.

Jean was still enthusiastic at the end, despite having now walked about six miles from 2pm to 8pm!

The best thing was, I recorded about two hours of it on my concealed camera. It's mainly shaky footage of bushes and sky, but it offers the context for the audio track, which records all the awesome conversations Jean and I had.

Van calamity (by alaric)

Last Sunday, we attempted to go to Cheltenham in the van, as Sarah had a WoPoWriMo launch meetup to attend.

We're used to having to deal with ice on the hills leading out of our valley, as water from the farm fields tends to run off into the road; so if it gets cold, it turns into sheets of ice. There were a few patches of ice on the way up, but nothing like what I've managed in the past, so imagine my surprise when I turned a sharp bend onto a sheet of ice that spanned the entire road. The van promptly lost traction, so I stopped and attempted to gently reverse back around the corner to try a different route.

Sadly, the steering had no effect, quickly followed by the brakes; the van began a slow, graceful, unstoppable pirouette until it ended up like this, with the nose wedged into the bank:

That's looking down the hill from above. As you can see, I'd already done a bit of salt-spreading by the time that photo was taken; before I spread the salt, the ice was so slick that I couldn't actually stay standing if I got out the driver's side, I had to climb across Jean and get out the other side.

Sarah had a deadline, so headed off on foot to try and catch a bus, leaving me with Jean to try and free the van. I could reverse it as the rear wheels just span, despite me shoving some road salt underneath. I tried letting the rear tyres down, in the hope that a larger surface area in contact with the ground would help me get traction, but no luck.

So I proceeded to salt the ice sheet; if I could find somebody with a tractor of a 4x4, perhaps they could pull the van from above and get it free of the bank, then I could complete the turn and head off down hill. The salt began to melt the ice, and then salty water started to flow underneath the ice sheet, creating pretty patterns; and allowing me to wack it with my folding shovel to break it, at which point I found out it was a good half inch thick, even after being partly dissolved from beneath:

But the one tractor-owner I knew the number of wasn't answering, and another that a passer-by knew couldn't help, so I continued to try and get it free myself. I gave up on being able to drive backwards, so I took the folding shovel (it's actually a military surplus trenching tool. Good job I carry a military surplus trenching tool in the van, isn't it?) and dug the bank away to release it.

After making sure the ice was well gritted. I didn't want to be downhill of a tonne of van, working away at the one thing holding it in place, while it was on a slick icy surface.

After much digging (indeed, it was now two hours after getting stuck in the first place), with the steering wheel on full lock to the left and the rear wheels spinning, I managed to get the van out forwards, and set off down the hill. Surprisingly, the front of the van wasn't ruined, as I'd thought it might be:

Jean was surprisingly patient for a four year old strapped into a stranded vehicle while I worked away; I figured she'd be safer strapped in than running around on the ice with me, even if another car came and hit the van.

Many Pockets (by alaric)

As I have mentioned before, I have many pockets.

A few people have asked about this now, so here's a run-down on what's in them.

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Burnt Face Man (by sarah)

I am actually married to Burnt Face Man it would appear!

Though the initially burns after the cooling water treatments didn't look too bad - half way through yesturday Alaric started to look really rough with some sort of ichor type stuff oozing from various places on his face.

So we made a sojourn out to get a cooling cream - mainly it is his hand that's hurting him though and hampering typing.

I am now wondering if I should have called him an ambulance when it happened as perhapse they would have given him more treatment and he'd be looking less rough :/ The other thing is I am alittle concerned about infection getting in but am hoping the cream will help with that.

High power LEDs (by alaric)

I've got a few 3W RGB LEDs that I've been meaning to play with, so over the Christmas break, I decided to hook 'em up to the bench PSU and have a play.

As I have but one variable bench PSU with current limiting, I could only easily light one LED at a time. I didn't have big enough resistors to build individual LED current regulation circuits - I just set the current limit on my PSU to 0.35A and cranked the voltage up until it maxed out, hooked up to one LED in turn.

They are certainly dazzlingly bright:

Since the green and blue LEDs both have the same forward voltage, I figured I might be able to drive them together by using a pair of resistors as a current splitter, and setting the PSU for 700mA, thus ensuring that 350mA went to each LED.

However, my 0.25W resistors started to smoke when I got to about 400mA, so I shut it off - if one of the resistors burnt out then the entire 400mA would go into the surviving LED, overloading it (until its resistor also burnt out), and possibly making the thing explode. I ended up with a nice pair of burnt-out resistors:

Which is a shame, because I'd love to see how bright the thing is at maximum, with all three LEDs going!

My lab partner was most impressed, and asked me lots of questions about current and voltage; I had to resist her demands to keep making things, so I could go inside and write this blog post: