I don't know what it is, but people
tell me that I need to do this or that and I nod my head and go on
doing things my way. Then eventually, I learn that they were right
all along. For example...
After the initial panic, when I thoughtI had paid for a non functioning 3D printer, I got to use the really
quite good 600 Euro XYZPrinting Da Vinci V1. Right, the demo has worked, time to do
a lithophane. There's tons of stuff on lithophanes on the net, but
basically they were ceramic objects with images etched onto them.
They were initially made by French craftsmen more than 150 years ago.
You view the lithophane backlit (presumably with a candle or oil lamp). The light is behind (or inside) the
object. Where the craftsman leaves a lot of material the image
appears dark. And where he scrapes away much of the material the
image appears light.
Here's an example of an old lithophane.
3D printers are ideal for creating
lithophanes because if you use slightly translucent white plastic
On the morning of last day of the year
I fixed a friend's audio amplifier, a Luxman L30.
The right channel
had gone. We'd bought the replacement transistors on E-Bay. They
arrived on the 30th. I'd previously looked inside the amplifier and
thought "buggar me this is going to be awkward. I'm going to
have to desolder four heavy duty power duty transistors just to get
at the circuit board." But I'd said I'd do it and thought I'd
better have a go. I was slightly worried about the job and it even
disturbed my sleep. In the holiday morning though I
uncharacteristically decided to stop watching TV and get on with it.
I found the solution, did the job, and got the amplifier working again.
(See the end of this blog entry for details). I was so happy when I
heard music coming out of both speakers. The evening of last day of the year. The food was nice, the wine was fine, the company pleasant, but after
the first hour I was bored out of my tiny mind. My fault.…
There's a test somewhere on internet
which tests reaction times, or recognition times, of the names of
colors. It is a test of the Stroop effect. For example you have to say
what color is the text of a word, but the word is green, and maybe it
is written in red.
When you do the equivalent test in
black and white people are generally more accurate and faster. The
problem, presumably, is because the brain recieves two messages... The color of the letters What the letters say. ...and has to conciously decide which
is correct. A red arrow stop sign in a traffic light is a place where a shape and a colour disagree. This is why I don't like these traffic
I did not like them even
before I heard about the Stroop effect. The red stop arrow I
particularly dislike, because an arrow, to me, say "GO! GO! GO!"
while the red color says "STOP!" So, combined, they confuse
me. But maybe it is because I'm limited, as my "friends"
and "family" hint…