Tiddlywiki - A starting point with all extras

My intention for this post is to be a single entry point to access an empty TiddlyWiki (in terms of contents) but preconfigured with all extras, plugins, and tweaks I may come up with. So that you might always find my latest version here, including my own tweaks as well as those by third parties I'm planning to talk in the future about.

Tiddlywiki - A scalable knoledge management tool

When developing new projects I often found my self in the very same situation: I have read through tons of pages of manuals, wikis and books, and would like to create my own notes on the subject. Be it for a college subject, a new electronics project, or a complex subject I'm enjoying. 

In any case, I need a way to add notes, attach files (e.g. PDFs, videos, source code, etc.) and insert images. Also, it's of upmost importance to be able to create hierarchical dependencies between my notes (i.e. subsections or similar) and be able to navigate through the data in an intuitive way that does not require tons of mouse-scrolling. And most importantly, the data must be easy to export and available offline, as I don't want to get stuck with any commercial services. 

If you are in a similar situation, then read on.

rsync: copy files the intelligent way

You probably heard about last Friday's massive cyber attack that affected millions of outdated machines that still run Windows XP, but also newer version. Luckily the pandemic got halted almost by sheer luck (read more at hackaday).

Anyway, it could have affected any of us (maybe dual-boot?), which alerted me of the fact that I had not backed up my files for quite some time now. This gave me two options. Either plug in my external backup HDD and copy everything with my file browser (overwriting old files), or do it the intelligent way: an incremental update to my backup with rsync to only copy modified files.

Reduce eye strain and insomnia when working at night with F.lux and Redshift

For thousand of years our days have been scheduled by the sun, so it is no surprise that our biological clock can be directly affected by the amount of light we get. Yet, our bodies can not differentiate sun light from artificial light, and in our modern societies we are surrounded by the later until the very last minute we go to sleep.

Melatonin is the hormone that tells our body when it is time to sleep, but it secretion can be affected by exposure to bright light, specially blue light of which we get a lot during day time, while red light, like that for example of sunsets, does not hamper our sleep cycle. The effect of light on our daily cycles has been studied by Harvard among others.

In this post I am going to talk about software to automatically reduce the amount of blue in your screen without you even noticing it according to the time of day. Remember that screens produce any color by mixing red, green and blue light sources.