Some reading from Wireless Pi:
Magnetic Core Memory
Homework
This is a part of the homework feature of my blog, which is an ongoing conversation with my mate S.F.
Hey mate. Lovely to see you again, as always. Can’t wait to do it all again soon!
Two interesting movies I’ve seen lately:
- Perfect Days (2023)
- The Man from Earth (2007)
The prompt for my breathing timer which I gave to ChatGPT, was: “please create a web page for me with HTML and JavaScript that I can use for breathing techniques. I want two modes: box breathing which is in for 4 seconds, hold for 4 seconds, out for 4 seconds; and 4 – 7 – 8 which is in for 4 seconds, hold for 7 seconds, out for 8 seconds. I should be able to pick the mode I want and then the app will prompt me with timers about what to do next.”
The hard problem of consciousness is one of the most profound unsolved questions in philosophy and cognitive science. It asks why and how does physical activity in the brain give rise to subjective experience? In other words, why does it feel like something to be conscious? I’m not sure of course, but it seems to me that the capacity for memory is tied up with consciousness, inasmuch as we don’t seem to have memory without first having been conscious.
Cartesian doubt is a form of methodological skepticism associated with the writings and methodology of René Descartes, the idea being that we can find things which are indubitable, that is, beyond doubt. Descartes famously found “I think, therefore I am.” That he could think was an indubitable fact. I have a similar thing which I like that is: “I know that I am having a sense experience”. It’s kind of along the same lines but includes more primitive conceptions, such as knowledge, time, identity, sensation, and such.
Conclave (2024) was an interesting film about the election of the pope. It’s fiction and you don’t need to be a true believer to enjoy the movie.
We mentioned about Pamela Anderson, and her movie Pamela, a Love Story is on my list. Pamela was at one point married to Tommy Lee of Mötley Crüe fame.
You recommended The King of Kong (2007) and I recommended Ready Player One (2018).
We discussed the Pareto distribution which is a type of power law distribution. These types of distributions can mess with our intuitions because they are not similar to bell curves or other less extreme distributions. The Pareto distribution gives rise to the “80:20 rule” where 80% of outcomes are for 20% of causes.
Clever woodworking joints
Everything you should know about certificates and PKI but are too afraid to ask
RM12-9HR REMCO VRLA Battery for PowerShield Defender
This is a note for Future John. Today I got two new RM12-9HR REMCO VRLA Batteries for each of two PowerShield Defender 1600VA UPS systems. The RM12-9HR batteries are 8.5 Ah 12 V batteries I paid AU$65 each for four of them.
Learning the Art of Electronics: 2N.3.3 Decibels | Learning Electronics In The Lab With Jay Jay
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This post is part of my video blog and you can find more information about this video.
Silly Job Title: Maker of Videos. I am the Maker of Videos!
In this video we continue working through Learning the Art of Electronics. There is no prac today, today we cover some material about decibels (subscriber-only content).
In today’s video I mention about my mate Jason Jacques who is a fellow YouTuber. Also thanks to my mate Chris from Learning as a hobby for telling me about Desmos.
Over on Wikipedia you can find out more about Decibels and Alexander Graham Bell.
The book I recommend is: Logarithms and Exponentials Essential Skills Practice Workbook with Answers (Improve Your Math Fluency).
I included a plot of the logarithm from Desmos: Desmos Logarithm Plot.
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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 300pcs Heat Shrink Wire Connectors![]() |
Let’s go shopping!
John Teel on voltage regulators to avoid
UPERFECT 4K Portable Monitor 15.6″ UHD
Today installed my replacement UPERFECT 4K Portable Monitor 15.6” UHD IPS 3840×2160 USB C Monitor HDR FreeSync from UPERFECT. This is a small form factor 4K display which I use as the third 4k monitor on my primary workstation. I use it for displaying notes and reference material, mainly this:
Gabriel’s horn
Today I learned about Gabriel’s horn, a solid of revolution with infinite surface area and finite volume.

