Engineer In Wonderland | Electronics Weekly

One I missed: Ultra-low-power multi-core Risc-V at ETH Zurich

12th March 2019 Engineer In Wonderland

Engineer In Wonderland | Electronics Weekly

PULP – Parallel Ultra-Low-Power Processing-Platform, is a research programme between the Integrated Systems Laboratory (IIS) of ETH Zurich and the Energy-Efficient Embedded Systems (EEES) group of University of Bologna – towards an open, scalable hardware and software research platform that will achieve the highest possible energy efficiency (goal is to “break pJ/op barrier”) within a power envelope of a few mW ...

3D printing: a moving object in one go

8th March 2019 Engineer In Wonderland

Engineer In Wonderland | Electronics Weekly

It is a moving epicyclic gear train, printed in one go – so gaps have to be fairly accurate. It stays together – and would have to be broken to get it apart – because the gears are all double-helical types (actually herringbone gears) – and I thank Wise Mr Kurt of this parish for helping me with this nomenclature ...

MWC: Exhibitors, watch your stuff

6th March 2019 Engineer In Wonderland

A friend of mine just came back from Mobile World Congress, having been in charge of a stand. And, despite having a successful show, was disappointed to report that the locked central storage room of the stand had been broken into after the last day of the exhibition, and various expensive items taken – locked cupboards had been broken open. ...

One way to 3D print Braille

20th February 2019 Engineer In Wonderland

Hearing that there was a 3D printer around, a friend asked: ‘Could I print Braille?’. Hmm, not sure, but here goes: Caveat – the process below makes something that looks like Braille, but the result has yet to be tested by a reader of Braille. First, use a website to convert your written text into Braille. There is a free ...

Richard Wilson, our friend and former editor, has died

13th February 2019 Engineer In Wonderland, News

Engineer In Wonderland | Electronics Weekly

This is a sad day at Electronics Weekly, as we just learned that our former editor Richard Wilson died over the weekend, with his family alongside, after a long illness. I can’t say enough nice things about Richard. At work, he was incredibly hard-working, wise, effortlessly intelligent and dedicated to keeping Electronics Weekly on an even keel. Personally private, we ...

Self-assembling nickle foam challenges titanium, and could float

11th February 2019 Engineer In Wonderland

Engineer In Wonderland | Electronics Weekly

Nickel can be as strong as titanium and the density of water, according to a paper in Nature Scientific Reports. ‘High strength metallic wood from nanostructured nickel inverse opal materials‘ describes a material whose strength comes from nickel struts (as narrow as 17nm) whose local yield strength is 8GPa – 4x that of bulk nickel. According to the paper, which is available ...

Tiny spider brain solves complex problems, and remembers solution

8th February 2019 Engineer In Wonderland

Wise commenter of this parish Steve K posted a comment on this story about bees that can add and subtract, which reminded me of some spider research I read about a while ago. In that research, a spider-eating spider was confronted by two platforms, each supported on a thin twisty pole – the two poles were entwined to some extent. One ...

Gear teeth shapes

6th February 2019 Engineer In Wonderland

Why are gear teeth the shapes that they are? I am pretty certain lots of folk know, but this ex-electronic engineer didn’t – apart from that they must be to reduce friction in some way. Now I know a little more, though this YouTube video by ThisOldTony, which describes why involute teeth are like they are. Essentially, they avoid mechanical ...

Two days before the lathe

30th January 2019 Engineer In Wonderland

Engineer In Wonderland | Electronics Weekly

Having done quite a bit of 3D printing with my trusty tiny cheap Fabrikator v2, a few issues are emerging. DIY diameter-reducing sleeve installed One is z-wobble (visible here) caused by a rigid yet slightly non-coaxial coupler between that and z-axis drive stepper motor, and a slightly bent leadscrew. My obscure printer uses the same leadscrew as version 1 of the ...

Nice source of button cell battery information

28th January 2019 Engineer In Wonderland

Energizer has put some battery knowledge documents onto the web. There is a good one describing the difference between 11.6 dia x 5.4mm cells of the LR44/SR44/AG13/357 for example who knew there were two typed of silver oxide cell, with either KOH or NaOH electrolyte (KOH better load performance, but harder to keep sealed). There is also one on lithium coin ...

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