While working from home I, like millions of others, am stuck in constant conference calls. After almost a year you would think that we all would have this under control. But no, not a chance. It takes only four simple words halfway through a lengthy explanation to remind us we […]
How to access a database from an App
In the previous post, Writing an Android application – investigating Xamarin Forms, I looked at how to get a basic Android application running on my phone. Most applications’ purpose are to represent data to the user in some way and in most cases this data is stored in a database. This […]
Writing an Android application – investigating Xamarin Forms
Introduction How do you go about writing your first application for Android or iOS? I had the same question and set about finding out. Having briefly experimented with Android Studio back in the early 2010s, I knew I wanted everything to be as simple as possible, no fiddling about for […]
Where is the centre of gravity of a self-balancing robot?
This is part of a series of posts covering the development of a self-balancing robot: Modelling an inverted pendulum Building a self-balancing robot This post The mathematical model of an inverter pendulum previously developed for the self-balancing robot, needs three parameters to accurately represent reality. These are Weight of the […]
Nikon D780 review – The last of the prosumer DSRLs?
Introduction Looking for a professional review of the Nikon D780? Want to know how much noise to expect at ISO 51200? Need an in-depth synopsis of the new features carried over from the Nikon Z6? Well, then you are looking at the wrong page, sorry. If you are however looking […]
How to contruct a self-balancing robot
This is part of a series of posts covering the development of a self-balancing robot: Modelling an inverted pendulum This post Dertermining the centre of gravity for a self-balancing robot Previously we investigated how to model an inverted pendulum. It is now time to go ahead and build the […]
Modelling an inverted pendulum – deriving a mathematical model
This is part of a series of posts covering the development of a self-balancing robot: This post Building a self-balancing robot Dertermining the centre of gravity for a self-balancing robot Aim Accurately model an inverted pendulum to use for control algorithms development for physical implementation. Personal goal: refresh basic understanding […]
Creating an E-ink weather notification board
I love e-ink displays. Their ability to make something digital seem just a little bit analogue intrigues me and I just had to make anything that makes use of one. Like many, many other people on the internet that turned out to be a weather station. The initial aim, seeing […]
RetroPie Arcade Part 4 – Completing the build
Part 1, part 2 and part 3 of this build can be found in the links. In this post we will look at how to complete the build now that we have Retropie running on the Raspberry Pi, the screen working and an enclosure to put everything in. Controller The initial planning […]
RetroPie Arcade Part 3 – The enclosure
Part 1 and part 2 of this build can be found in links. The size of the enclosure, and the whole system, was completely dictated by the size of the screen I decided to use. The initial idea was to buy cheap portable game systems from eBay, remove whatever was […]
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