I have a new post on Hackaday: What Is The Fourier Transform?
What Is The Fourier Transform?
Reply
Category Archives: Mathematics
More from Ali the Dazzling
Imaginary numbers aren’t imaginary and complex numbers aren’t complex.
Ali the Dazzling talks about “e”
But What Actually Is a Particle? How Quantum Fields Shape Reality
Mail Call #36: QuickStudy Cheatsheets and Soldering Stuff from Amazon | In The Lab With Jay Jay
This post is part of my video blog and you can find more information about this video over here.
You can support this channel on Patreon: patreon.com/JohnElliotV
Silly Job Title: Electronics Guru.
In this video we see what arrived in the mail from Amazon. The main haul was my QuickStudy cheatsheets. But I also go this stuff too:
Thanks very much for watching! And please remember to hit like and subscribe! :)
Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!
Yum Cha 100pcs Heat Shrink Wire Connectors |
Let’s go shopping!
Physics
This is what doing physics looks like. Theoretical physics, that is!
New Book Teardown #7: Electricity and Magnetism 3rd Edition (2013) | In The Lab With Jay Jay
This post is part of my video blog and you can find more information about this video over here.
You can support this channel on Patreon: patreon.com/JohnElliotV
Silly Job Title: Prime Hack.
In this video we tear down Electricity and Magnetism 3rd Edition written by Edward Purcell and David Morin and published in 2013.
Electricity and Magnetism is one of the books I am taking notes for as a part of my Learning the Art of Electronics project. These notes are a perk for people who support me on Patreon, so what are you waiting for!? :)
There is a website for the book maintained by the publisher, but regrettably there’s not much there, just some material available to instructors only: https://www.cambridge.org/Purcell-Morin
I mention two xkcd comic in the video, those are these: Farads and Nerd Sniping.
The “esu” is prounounced as “eee-ess-you” and is also known as the Statcoulomb.
I mention the Franck–Hertz experiment which happens to be something I wrote a Hackaday article about: A DIY Version Of The Franck-Hertz Experiment.
The first edition of Electricity and Magnetism was volume two in a five volume course: Berkeley Physics Course.
The books mentioned in Chapter 1 include The Flying Circus of Physics and How Things Work.
The websites mentioned in Chapter 1 are:
The Feynman (1977) reference is to The Feynman Lectures on Physics which is also available here: www.feynmanlectures.caltech.edu
The symbol: ∇ (“nabla”, an upside down Δ “delta”) is the vector differential operator and its key uses are:
- ∇f → gradient of scalar
- ∇·F → divergence of vector field
- ∇×F → curl of vector field
- ∇² → Laplacian
The Big Clive video that I mentioned was this one: How a stungun creates 20kV from a 9V battery.
I also mention the show’s wiki, the ITL Wiki, which is on the web over here: https://www.inthelabwithjayjay.com/wiki/
Thanks very much for watching! And please remember to hit like and subscribe! :)
Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!
AIRAJ 3-Pcs 7-inch Locking Pliers notes |
Let’s go shopping!
Old Book Teardown #12: Principles of Electronic Circuits 2nd Edition (1997) | In The Lab
This post is part of my video blog and you can find more information about this video over here.
You can support this channel on Patreon: patreon.com/JohnElliotV
Silly Job Title: Technical Director.
In this video we teardown this old book: Principles of Electronic Circuits 2ed by Stan Burns and Paul Bond.
Some quotes which came up in the video:
Young man, in mathematics you don’t understand things. You just get used to them.— John von Neumann
If you think you understand quantum mechanics, you don’t understand quantum mechanics.— Richard Feynman
I mention that my friend from Learning as a hobby is going to send me the CDROM that goes with this book, so I will update this post with a link to the ISO when it arrives!
Thanks very much for watching! And please remember to hit like and subscribe! :)
Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!
Yum Cha 3pcs Universal Metal Spudgers |
Let’s go shopping!
Channel News #8: Update Regarding Upcoming Projects and Videos | In The Lab With Jay Jay
This post is part of my video blog and you can find more information about this video over here.
You can support this channel on Patreon: patreon.com/JohnElliotV
Silly Job Title: Capacitor Captain.
In this video I make excuses for why you haven’t had a video from me for two weeks. Excuses, excuses.
It is still my ambition to release three videos per week, on Tuesday, Thursday, and Saturday.
As I mention in the video I have been working away on the Learning the Art of Electronics project and making notes for all five of the referenced books but I still have a heap more work to do. Further, I’ve been working through the first edition of Learning the Art of Electronics because my second edition hasn’t arrived yet. So today I bit the bullet and canceled my order of the second edition from Amazon AU (I’ve been waiting since January) and placed a new order with Amazon US so my second edition should now be arriving by May 24, later this week.
I have ordered some bits and pieces for my Logitech BRIO web cam including this stand, so I should be able to start making maths videos on my channel soon. But it will be very basic high school maths. If you want more serious maths I would be happy to recommend my friend who makes advanced maths videos on his channel Learning as a hobby.
Speaking of my mate on the Learning as a hobby channel he recently scored a copy of the CDROM that comes with Principles of Electronic Circuits 2ed and is making preparations to send me a copy (either as an ISO or in the snail mail), so standby for more on that. This is a super exciting development because I had concluded that finding a copy of this CDROM was going to be impossible, but here it is!
The long projects that I’m working on which are presently brewing include:
- Silicon Chip and Jaycar Mini Project JMP003
- Demo of EEVblog BM2257 multimeter
- Old book teardown of Electric Circuits
- Project #1 from Maxitronix 30in1
- Lab #1 from Learning the Art of Electronics
I have made a start on all of the above but it’s going to take me some time to finish them all. In the mean time I am going to try to get some smaller projects done so that I can hit my target of three videos per week.
And that brings you up to date with news from the channel.
Thanks very much for watching! And please remember to hit like and subscribe! :)
Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!
Yum Cha 395nm UV Lamp notes |
Let’s go shopping!
Statistician Answers Stats Questions From Twitter | Tech Support | WIRED
This was a good overview of what’s possible with statistics: Statistician Answers Stats Questions From Twitter | Tech Support | WIRED.
But I’m pretty sure that at t=11:23 he gets it wrong. The probability that three people in a family have the same birthday isn’t 1 * 1/365 * 1/365. but rather it depends on the number of people in the family (starting, I guess, at some epoch). This is known as the Birthday paradox.
To be clear: they’re not asking what is the probability of three people being born on January 10. They asked what are the odds of three people from an unspecified family size being born on the same day (could be any day of the year).