Electric Vehicle Battery Calculations

The relation between reported consumption, remaining battery energy (% State of Charge, SoC), battery size, and eventually battery health (State of Health, SoH) may be more complex than what is initially apparent. For instance, a simple task such as reconciling reported consumption to how much SoC has been lost on a trip ends up requiring a good understanding of how much capacity is available to normal driving and in turn how much is set aside to buffers....

September 26, 2024 · Per Bækgaard

Migration to Hugo

This site has been migrated from WordPress to Hugo. This will make it easier to maintain (for me) and less vulnerable. It will also be much much faster (Hugo is pitched as “The world’s fastest framework for building websites”), since it serves static files only via the webserver, and build time is of the order of seconds only (latest rebuilt took 399 mS on my aging server), and it can easily be managed via git and a CI/CD framework....

July 30, 2023

Billeder fra Tivoli, Gallakoncert og Jazzhouse…

Hvis du er kommet her på siden for at finde billeder fra Musikskolernes Dag i Tivoli 2013, fra Høje-Taastrup Musikskoles Gallakoncert 2013 eller fra SABB og MGK koncert i Jazzhouse 2013, så kan du klikke på linkene herunder for at komme direkte til oversigten: Musikskolernes Dag i Tivoli 2013 (eller frasorterede) Høje-Taastrup Musikskoles Gallakoncert 2013 (eller frasorterede) SABB og MGK koncert i Jazzhouse 2013 (eller frasorterede)

May 4, 2013 · Per

Autumn Leaves (and the need for high DR)

Autumn has been particularly beautiful this year. Until roughly a week ago, we had only little wind and not too cold weather, so the leaves stayed put for a long time. Sadly that has now changed… Luckily, we visited the picturesque National Park Söderåsen in Skåne, Sweeden while the colors were still at their best. Hiking the forest was a wonderful experience, following trails along the small river until it eventually took us up the ridge overlooking the rift valley....

October 29, 2012 · Per

Sort Sol 2012

Lyset er altid flot i Vadehavet, og mulighederne for fantastiske naturoplevelser er store — også når sommeren går på hæld! Efterårsferien er det bedste tidspunkt at opleve det fantastiske naturfænomen “Sort Sol”: Op mod 1 mio stære som ved solnedgang samles i rørskovene for at gå til ro for natten. Vi var heldige at se det to gange i år; én gang med Sort Safari syd for grænsen i Tøndermarsken, og dagen efter i Ribe Østerå. I Tøndermarsken anslog vores kyndige guide Frands (sp?) at der var omkring 700.000 stære. Vi har tidligere set Sort Sol (i 2008,), og dengang anslog vores guide Lau at der også var ca. samme antal. Under alle omstændigheder er det rigtigt mange(!), og det er en fantastisk at opleve på nært hold. Lyset og vores position i forhold til solen var ikke helt så god denne gang som sidst, og der var ikke så mange rovfugle til at få stærene på vingerne, men der kom lidt billeder og et videoklip ud af det. Videoen ligger her på YouTube (lydsporet er frit efter “Hør den lille stær”): ...

October 17, 2012 · Per

HDHomeRun and MythTV 0.25

After having run the previous version of MythTV for a couple of years without any significant issues, I upgraded to MythTV 0.25. That broke a few thing, one of which I initially didn’t want to spend time on fixing for now: My existing grabber card sometimes locked up when starting a recording, preventing the box from shutting down, and it didn’t record any of the scheduled recordings either. I thought this could be related to a bug in an updated driver, so I decided to test out a HDHomeRun setup instead. As for saving time, that turned out to be a bad idea! But in terms of getting to a working solution, it looks as if I eventually got to a working solution… read on below. ...

September 21, 2012 · Per

WordPress on lighttpd with pretty permalinks

Even though wordpress runs very well on lighttpd (lightty), information on how to set this up is quite scattered around the net. On top, most of the explanations refer to one another, and only a few have proper explanations on what is going on — even though many are very helpful and may even work in some/many cases. One otherwise good write-up is the one done by Joe Crobak, but I think it is not fully correct as it suggests the two alternative methods below to be used in parallel (which is not really be needed). My take on this (which could also be incorrect… so I advice the reader to dig into the details of this before deploying it) is as follows: ...

March 8, 2012 · Per

The worlds best camera…

OK, it’s an old saying but nevertheless: The worlds best camera is the camera you bring with you, especially when there is a shot you’d otherwise have lost. Yes, the quality is not as good as when I bring my Lowepro bag stuffed with DSLR equipment and a tripod. But sometimes you just happen to experience a beatiful or maybe unexpected sight that only lasts for a few minutes, and you want to capture it in some form, for you to recall later....

November 10, 2011 · Per

Roland R-05 Technical Review

Introduction I recently bought a Zoom H1 handheld recorder. As such, it offers tremendous value for the money, and I would likely have kept it (despite the fact that the handling noise is really high and the stand-mount is just made of plastic and the threads may easily be destroyed). However, as it turned out, my sample with serial number 12xxx suffered from a high current drain when switched off. It consumed 47 mA, which means it will drain a normal Alkaline battery in 2-3 days....

November 12, 2010 · Per

Billeder fra Musikskolernes Dag i Tivoli

Billeder fra Musikskolernes Dag i Tivoli 2010 (som billedet ovenover fra “Syng med rokkerne”) er nu online, og du kommer direkte til dem ved at klikke her. Hvis du gerne vil bruge billederne i f.eks. en folder, brochure eller tilsvarende, så send en mail til mig først (eller læg en kommentar til dette indlæg med en gyldig mail-adresse, så mail’er jeg tilbage). [really_simple_share]

June 14, 2010 · Per