Autonomous Army Truck – 1. Mechanics


Original

This is the 6 wheels drive toy army truck that I bought several years ago (for fairly cheap) for one of my kids.

When reading the specs (6wd, 3 differentials, independent suspensions on each wheel, etc. … ) it sounded too good to be true for the price… and indeed, I remember being disappointed when I received it : the rubber of the wheels kept coming off, the battery was really bad, but most importantly both the steering and the main motor were simply on/off not *proportional* !

At the same time, I was impressed by the modularity of the design, how everything was screwed rather then glued in place and how easy everything was to take apart, ready to be modified / upgraded…

And I *knew* I could do better… sooo much better !

Here’s what it can do *now*, after the 2 main mechanical upgrades:

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ESP8266 Temperature Logger


This is a quick post about a pretty standard Temperature (and Humidity) data logger. Yes, I’m finally jumping on the IOT bandwagon, whatever that is… πŸ™‚

The background for this is my recent discovery that the adrenaline (epinephrine) injections that a person at risk of anaphylaxis has to carry around should normally be stored within a very tight temperature range (20-25Β°C with short exposures to 15-30ΒΊC tolerated).

This came as a big surprise, especially in the context of going on a skiing holiday, so I decided to do something to at least have an idea of the temperature range that these injections experience, before going any further and thinking about how to store them better.

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Rotary Dial Phone Revival – 4 – Final


This is the next and final step after dealing with the headset a few weeks ago.

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Rotary Dial Phone Revival – 3 – The Headset


This is the next piece of work after step 2 that dealt with the ringing bells, and now it’s time to look into the headset and how we can connect this to the new brain of the phone.

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Rotary Dial Phone Revival – 2


This is the 2nd part of a multi post series about bringing back to life an old rotary dial phone.

After managing to interface with the dial itself inΒ part 1 Β it’s now time to do something about the vintage, bells based, ringing mechanism.

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Rotary Dial Revival


I know it’s been a long time since my last post, but hey, at least I have an excuse…Β  he’s 2 and a half and knows no rest or the meaning of the phrase “staying still” πŸ™‚

This is (hopefully) only the 1st part of a series, based around this ’70s Rotary Dial Phone from Eastern Europe. I inherited it from my grandad when he passed away a couple of years ago. This is the same phone that I remember from when I was a kid and would play with at my grandparents’ house… ok, ok, I’ll stop here with the nostalgia πŸ™‚

So I can personally confirm it’s at least 35 years old, but probably more like 40 or 50. Most importantly it has quite a sentimental value for me, which means I have to be careful what I do with it !

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Game of Life on a Raspberry Pi (and a LED board)… in Haskell


This is a quick post about, re-purposing my Raspberry Pi + Peggy2 art installation, which already re-purposes a 8-9 years old Peggy2 LED board, to play Conway’s Game of Life.

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Custom Remote WiFi Mains Socket Switch


Here’s again one of these small hacks that I’ve been wanting to do for a while but never found the time…

There’s actually not that much to it, the most interesting part is probably just being amazed at how easy it is nowadays to pull off this kind of hack…

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Receipts Printer Photo Booth


As soon as I finished my previous project, I knew I could improve it…
With pictures, of course ! And also take them on the fly, like in a photo booth…
Why use Haskell to generate pictures on the printer ? Just because Functors, Applicatives and Monads are obscurely cool… πŸ™‚

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Thermal Printer Remotely Controlled through an ESP32


Again one of these things that I’ve been wanting to do for a long time, but never found the time to… having one of these little thermal printers that spit out your receipt at the till in a supermarket, and hack it to print little snippets of information like reminders or shopping lists, etc. …

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