@mrmartincowen.bsky.social
iPhone 13 mini was £100 less than iPhone 13, same parts, spec, performance. iPhone Air is £200 more than iPhone 17, worse in some ways. Many 12 & 13 mini users are ready for an upgrade but want mini size. Thin wasn’t demanded, hand sized is what counts.
Turns out that consumers like the idea of a phone that's the size of a cigarette pack and can easily fit in a pocket, but not one that's considerably bigger, but very, very thin. Apple makes a boo-boo. Needs to go back to the iPhone mini. www.ft.com/content/b015...
Apple’s ‘skinny’ iPhone falls flat with disappointing early sales
Consumers chose better value and superior performance over slim new design of Air model
www.ft.com
November 22, 2025 at 4:56 PM
iPhone 13 mini was £100 less than iPhone 13, same parts, spec, performance. iPhone Air is £200 more than iPhone 17, worse in some ways. Many 12 & 13 mini users are ready for an upgrade but want mini size. Thin wasn’t demanded, hand sized is what counts.
uncertain as to which one is correct at any given time
November 20, 2025 at 10:36 AM
uncertain as to which one is correct at any given time
Crashed Internally/Continuous Disintegration
November 18, 2025 at 9:40 PM
Crashed Internally/Continuous Disintegration
Cybersecurity professionals: Don't click on links in emails, especially to log in to banks.
This financial institution: click here in this email. Our Security people wanted a clearly understood URL, but Marketing overrode that because they need to track all engagements, obvs that's more important.
This financial institution: click here in this email. Our Security people wanted a clearly understood URL, but Marketing overrode that because they need to track all engagements, obvs that's more important.
November 18, 2025 at 2:37 PM
Cybersecurity professionals: Don't click on links in emails, especially to log in to banks.
This financial institution: click here in this email. Our Security people wanted a clearly understood URL, but Marketing overrode that because they need to track all engagements, obvs that's more important.
This financial institution: click here in this email. Our Security people wanted a clearly understood URL, but Marketing overrode that because they need to track all engagements, obvs that's more important.
And then downdetector.co.uk went down, because it too uses Cloudflare
Status overview
downdetector.co.uk
November 18, 2025 at 1:13 PM
And then downdetector.co.uk went down, because it too uses Cloudflare
That's clearly a hardware bug
November 17, 2025 at 11:33 AM
That's clearly a hardware bug
YouTube has lost the plot, I assure you nothing in my search history would relate to this
November 15, 2025 at 4:13 PM
YouTube has lost the plot, I assure you nothing in my search history would relate to this
As we approach the end of the year, your company might have unspent training budget that can be spent on books. The best engineers spend about £500/year on books and keeping themselves up to date. My list for this is year is at martincowen.me.uk/bookshelf.ht...
Bookshelf | Martin Cowen
List of books I have read
martincowen.me.uk
November 14, 2025 at 3:21 PM
As we approach the end of the year, your company might have unspent training budget that can be spent on books. The best engineers spend about £500/year on books and keeping themselves up to date. My list for this is year is at martincowen.me.uk/bookshelf.ht...
The funny thing about writing comments before coding in an interview: medium.com/@marciacripp...
is that I previously blogged about it
blog.martincowen.me.uk/comment-driv...
Why not adopt this practice every day?
is that I previously blogged about it
blog.martincowen.me.uk/comment-driv...
Why not adopt this practice every day?
November 12, 2025 at 9:01 PM
The funny thing about writing comments before coding in an interview: medium.com/@marciacripp...
is that I previously blogged about it
blog.martincowen.me.uk/comment-driv...
Why not adopt this practice every day?
is that I previously blogged about it
blog.martincowen.me.uk/comment-driv...
Why not adopt this practice every day?
Windows is both: I see you have an anti-virus installed, so I will use that instead of Defender.
and
I see you have a backup program installed (eg Easus ToDo) but when you restart I will insist you don't have backup running and must use OneDrive for that. And not let you start work until you submit.
and
I see you have a backup program installed (eg Easus ToDo) but when you restart I will insist you don't have backup running and must use OneDrive for that. And not let you start work until you submit.
November 12, 2025 at 9:45 AM
Windows is both: I see you have an anti-virus installed, so I will use that instead of Defender.
and
I see you have a backup program installed (eg Easus ToDo) but when you restart I will insist you don't have backup running and must use OneDrive for that. And not let you start work until you submit.
and
I see you have a backup program installed (eg Easus ToDo) but when you restart I will insist you don't have backup running and must use OneDrive for that. And not let you start work until you submit.
November 11, 2025 at 1:16 PM
Great argument from Carl
LLMs are just the next generation of data processing tech using lossy compression searching against a cloud scale index using unstructured query language. Not "thinking". Hallucinations are compression artifacts.
youtu.be/0qnZDMvJPh4
LLMs are just the next generation of data processing tech using lossy compression searching against a cloud scale index using unstructured query language. Not "thinking". Hallucinations are compression artifacts.
youtu.be/0qnZDMvJPh4
Generative AI's Place in the History of Tech: A Contrarian View
YouTube video by Internet of Bugs
youtu.be
November 10, 2025 at 2:26 PM
Great argument from Carl
LLMs are just the next generation of data processing tech using lossy compression searching against a cloud scale index using unstructured query language. Not "thinking". Hallucinations are compression artifacts.
youtu.be/0qnZDMvJPh4
LLMs are just the next generation of data processing tech using lossy compression searching against a cloud scale index using unstructured query language. Not "thinking". Hallucinations are compression artifacts.
youtu.be/0qnZDMvJPh4
Reposted
Before there were multimeters, there was the galvanometer. Born from Ørsted’s magnetic needle experiment and refined by Schweigger, Ampère, and Ohm, the galvanometer became the 19th century’s essential instrument for detecting and measuring electricity.
emedia.digikey.com/eMagazine-Vo...
emedia.digikey.com/eMagazine-Vo...
November 8, 2025 at 2:10 PM
Before there were multimeters, there was the galvanometer. Born from Ørsted’s magnetic needle experiment and refined by Schweigger, Ampère, and Ohm, the galvanometer became the 19th century’s essential instrument for detecting and measuring electricity.
emedia.digikey.com/eMagazine-Vo...
emedia.digikey.com/eMagazine-Vo...
Wonder how many scientific papers will be misunderstood by AI due to exponential notation which gets mangled in typesetting. Numbers like 106 would appear more often in their output than expected where a human would realise & correct to 10^6
November 8, 2025 at 12:33 PM
Wonder how many scientific papers will be misunderstood by AI due to exponential notation which gets mangled in typesetting. Numbers like 106 would appear more often in their output than expected where a human would realise & correct to 10^6
Hot take: speakers at conferences which will have a bigger video audience than in-person audiences should sit down. Even if most of the split screen is the slides, wandering around, kicking your feet and gesticulating is distracting and achieves nothing.
November 7, 2025 at 5:43 PM
Hot take: speakers at conferences which will have a bigger video audience than in-person audiences should sit down. Even if most of the split screen is the slides, wandering around, kicking your feet and gesticulating is distracting and achieves nothing.
Error handling with callbacks and line numbers in C.
If you put the __FILE__ and __LINE__ macros in the called functions, it will not show you the caller function location. Need to use a macro which wraps the function and passed params on, & adds these macros.
🧵
If you put the __FILE__ and __LINE__ macros in the called functions, it will not show you the caller function location. Need to use a macro which wraps the function and passed params on, & adds these macros.
🧵
November 6, 2025 at 12:41 PM
Error handling with callbacks and line numbers in C.
If you put the __FILE__ and __LINE__ macros in the called functions, it will not show you the caller function location. Need to use a macro which wraps the function and passed params on, & adds these macros.
🧵
If you put the __FILE__ and __LINE__ macros in the called functions, it will not show you the caller function location. Need to use a macro which wraps the function and passed params on, & adds these macros.
🧵
If you want to find the shortcut for a command in VS Code, you can type the name of the command, but if you want to reverse look up the keys to see what the command is, you can click the keyboard icon on the right in the search bar and then type the shortcut keys.
Ctrl-K Ctrl-S brings this up.
Ctrl-K Ctrl-S brings this up.
November 6, 2025 at 11:16 AM
If you want to find the shortcut for a command in VS Code, you can type the name of the command, but if you want to reverse look up the keys to see what the command is, you can click the keyboard icon on the right in the search bar and then type the shortcut keys.
Ctrl-K Ctrl-S brings this up.
Ctrl-K Ctrl-S brings this up.
I don't think there's any reason I should accept a LI request from a company owner who didn't honor their contract to pay for licences for software which I wrote.
It's a small business so they either knew or should have known. B2B so not a small % of sales like B2C.
It's a small business so they either knew or should have known. B2B so not a small % of sales like B2C.
November 4, 2025 at 3:34 PM
I don't think there's any reason I should accept a LI request from a company owner who didn't honor their contract to pay for licences for software which I wrote.
It's a small business so they either knew or should have known. B2B so not a small % of sales like B2C.
It's a small business so they either knew or should have known. B2B so not a small % of sales like B2C.
Software Design and TDD: every few months I re-read this amazing post and try and understand a bit more of it: explaining.software/archive/the-...
the sudoku affair
Software design is a deliberate process, and requires deliberate effort.
explaining.software
October 30, 2025 at 12:23 PM
Software Design and TDD: every few months I re-read this amazing post and try and understand a bit more of it: explaining.software/archive/the-...
C is simple language, they said. Then you get this comment in response to this talk www.youtube.com/watch?v=2KZg...
October 29, 2025 at 6:46 PM
C is simple language, they said. Then you get this comment in response to this talk www.youtube.com/watch?v=2KZg...
Feels odd doing publicity photography, should be bottom of the priorities list, but then the results are worth it. Updated the blog header photo
from to
from to
October 29, 2025 at 4:43 PM
Feels odd doing publicity photography, should be bottom of the priorities list, but then the results are worth it. Updated the blog header photo
from to
from to
Were there 12 of them?
October 29, 2025 at 8:31 AM
Were there 12 of them?
📫New on the blog: blog.martincowen.me.uk/unit-testing...
Final post of series (4/4) on the firmware for my PCB, covering unit testing with CppUTest for C projects. Fast - runs 0.12ms per test, completes within 100ms. Runs on build, so suits CI. Source now on GitHub.
#C #firmware #TDD #unittest
Final post of series (4/4) on the firmware for my PCB, covering unit testing with CppUTest for C projects. Fast - runs 0.12ms per test, completes within 100ms. Runs on build, so suits CI. Source now on GitHub.
#C #firmware #TDD #unittest
Unit Testing Embedded C: Off-Target with CppUTest on Windows
The reasons for having unit tests in your projects are well-known and accepted; I'm not going to rehash them here. Whether you follow the school of thought that says you must write the tests first or ...
blog.martincowen.me.uk
October 28, 2025 at 5:40 PM
📫New on the blog: blog.martincowen.me.uk/unit-testing...
Final post of series (4/4) on the firmware for my PCB, covering unit testing with CppUTest for C projects. Fast - runs 0.12ms per test, completes within 100ms. Runs on build, so suits CI. Source now on GitHub.
#C #firmware #TDD #unittest
Final post of series (4/4) on the firmware for my PCB, covering unit testing with CppUTest for C projects. Fast - runs 0.12ms per test, completes within 100ms. Runs on build, so suits CI. Source now on GitHub.
#C #firmware #TDD #unittest
Tell me you've written a giant pile of code and have just found out that your compliance procedure requires tests a few weeks before the release date, without telling me.
October 28, 2025 at 12:26 PM
Tell me you've written a giant pile of code and have just found out that your compliance procedure requires tests a few weeks before the release date, without telling me.
I got 3 blog posts out last week, a record for me, totaling 6k words. Final in the series should be out by the end of tomorrow, another 2k words.
But it's the research and code development behind these posts that takes the time, not the final write up. As always, I'm hoping they will help someone.
But it's the research and code development behind these posts that takes the time, not the final write up. As always, I'm hoping they will help someone.
October 27, 2025 at 6:58 PM
I got 3 blog posts out last week, a record for me, totaling 6k words. Final in the series should be out by the end of tomorrow, another 2k words.
But it's the research and code development behind these posts that takes the time, not the final write up. As always, I'm hoping they will help someone.
But it's the research and code development behind these posts that takes the time, not the final write up. As always, I'm hoping they will help someone.