Fedora stores the files needed for an upgrade in /var/lib/dnf/system-upgrade/ if space is getting short in root as I was, then make a symlink to a disk or partition that does.

I had the task of remote controlling lights in a woodland using MagicQ.  The topography was relatively simple, two pies, six moving head lamps and a laptop to control them.  All using Linux of course.  I had previously tried using a conventional network with (expensive waterproof) access points lofted up into trees.  This was partly successful but from suffered intermittent network failures.  And call-outs for me in mid-winter. Read More

Coin acceptors like LINK are relativiely cheap and can interface with a microcontroller but have several issues that this exercise attempts to overcome. Read More

Sometime you need to do this.

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I have one of those cheap LED badges.  Having managed to program it, (another blog perhaps), I washed it.  Not deliberately, it just was in the pocket of a jacket.  Additionaly it endured several washes due to being trapped in the door seal, unseen, for several weeks. The result was a bloated LiPo battery and the charge control chip losing a leg.

This this how I fixed it.

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