This blog is for my future and past info and reviews on various tech stuff….

Watches, bands & rings	Phones / Phablets	Compact cameras	Reviews	Resolution and Noise
Batteries and usage	PC & Code	Various tech stuff	Math	Other stuff

Newer reviews can be expected to be ongoing projects, with minor additions or corrections.

Note: When I rate stuff, a 10/10 does not indicate perfect in an absolute academic sense, but as in (at least) as good as could be expected at the time, minor flaws allowed. For portable devices typically limited by the size and weight. Value for money also counts. An electronic device that got a high score in 2005, most likely would seem like pure trash ten years later….

2026-05-11. After using Discus for many years, and using an ad-blocker, I only recently noticed all its ads, so now switching to WpDiscuz.

• Length of round (carpet) roll

  

  For some reason, surprisingly few know this extremely simple formula, please share it.

  I have actually seen in a carpet store an employee unrolling the carpet to measure the length!!

  [The formula is simple to prove too… r=kφ, L=∫r dφ=∫kφ dφ=½k(φ₂²-φ₁²)=½k(φ₂+φ₁)×(φ₂-φ₁)=½(r₂+r₁) ×n2π=(r₂+r₁) × nπ , q.e.d.]
  

  Continue reading...</p> <p> </p> <p>
• How to wait upgrading to Win10

  If you do not want to be a first mover installing Win10, then this link have the recipe to delay it

  http://www.ghacks.net/2015/06/01/how-to-block-the-windows-10-update-notification-in-earlier-versions-of-windows/

  (A few windows update should be uninstalled if already installed, and then hidden until you want them)

  

  Continue reading...</p> <p> </p> <p>
• Eye resolution test

  I have made a simple test image to test the resolution of your eyes on a phone, phablet, tablet, laptop or PC!

  The most common result is it is pointless to go beyond around 1/12000 of the viewing distance

  Be SURE it is shown in the screens native resolution. e.g. 960 pixels should fill half a FullHD display. (or use one of the added ones with your screens resolution)

  Be SURE that your browser or your windows settings doesn’t do any scaling/zooming/smoothing, i.e. one pixel in the image is one pixel on the display. (If in doubt take a magnifying glass -or macro camera- and look closely on the screen, it should be like the mock-up later in this post)

  

   

  It is the point where the single line pair is indistinguishable from the double line we are looking for (that is: where it looks like one continuous thick line)

  You will most likely find the finest resolution using the red or green figure.

  Use any prescribed glasses that you normally would for the distance – we are testing resolution, not focusing ability.

  NOTE: If you got a PenTile display, usually the green will do fine! Have a look at this on different subpixel arrangements. Several pixel arrangement exists out there, that could have similar issues…

  Continue reading...</p> <p> </p> <p>
• Principal ideas for smarter image sensor technology

  Currently the limitation in the amount of photons that can be caught versus the noise, set a limit for the dynamic range.

  But what if the sensor output could not be over saturated?

  

  Continue reading...</p> <p> </p> <p>
• Automower 330X, Husqvarna, Review

  This Automower 330X is an upgrade from my 230ACX, See review here.

  Overall: Really satisfied. 9+/10, after software ‘update’: 7+/10
  

  

  It is rather similar to the 230ACX with some important upgrades, and a few step backs

  Continue reading...</p> <p> </p> <p>

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Blog in English (well sort of, bare with me, non-native…), a few earlier than 2010 are just blunt copies of the source texts in Danish – Google translate helps here….

Collecting of old stuff started May 2015. Entries are generally attempted dated with original stamps, even if they are somewhat updated since, several reviews have been ongoing ‘projects’.