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stop wasting water

How Much Water Do We Waste Until the Shower is Hot Enough?

My friend Eric and I both noticed that on each shower, we have to wait few minutes until water is hot enough. During all this time water is pouring directly to the drain. We agreed that we need to do something about it.Before taking action, I thought that I need ...
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polygon-based SLAM algorithm for robotic exploration

Polygon-Based 2D SLAM for Robotic Exploration

Johann Dichtl successfully defended his PhD, that I've co-supervised with Luc Fabresse and Guillaume Lozenguez. The defense took place this tuesday July 2nd, 2019 morning. The jury members were: Prof. Ouiddad Labbani from Université de Limoges, Dr. Mikal Ziane, HdR, from Université Paris Descartes, and Dr. Laetitia Matignon from Université ...
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Useful 3D Print Kitchen Sponge Hook

Useful 3D Prints: Kitchen Sponge Holder Hook

One of my motivations to 3D printing is home repair and improvement. In this small project, I decided to use polypanels to make a flexible, yet robust hook for a sponge holder in my kitchen. Starting from polypanel snaps provided freely available online (Thanks Devin). STL design files are freely ...
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Observer Design Pattern implementation in Pharo

Observer Pattern Made Easy with Pharo Lightweight Observer

Lightweight Observer is an alternative to Announcement, the default Pharo  implementation of the Observer Design Pattern. I started developing Lightweight Observer because I needed a small framework, with an implementation that can be easily converted to Javascript using PharoJS. I also wanted to be straight forward to use. I had ...
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arduino projects for cats

Arduino-Based Toys for Playful Cats: 3 Week-End Projects

In this selection of simple week-end projects, we target our furry friends. We provide a selection of three cool DIY projects using Arduino boards. Cats will love these electronic toys. They will cost you only few bucks, for hours of fun and laughter with your pet. Checkout the videos. They ...
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farmers market pharojs mobile app

Farmers Market App: Find Fresh Locally Grown Food

If you care both about the planet and your health, the Farmers Market app is for you! This app allows you to find nearby markets, where you can buy fresh food directly from farmers. Most of the produce are grown locally. This means less fuel for transportation. So, by buying ...
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smartphone Gps App New York

iOS Current Location Usage Description in Cordova

Providing a clear location usage description is critical to have your iOS app approved. With the default settings of the Apache Cordova location plugin cordova-plugin-geolocation, your app is likely to be rejected by Apple. I experienced this first hand with the iOS version of the Farmers Market app. Apple reviewers ...
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Large 3D printed pharo lighthouse

How to Make a Large Lighthouse Using a Cheap 3D Printer

As a Pharo addict, making a 3D printed lighthouse is a fun week-end project. This idea is even more attractive. It's a project that goes beyond what can be done using a small 3D printer, with a single extruder. The requirement are the following: The lighthouse can be taller than ...
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Robots To Collect Garbage Floating in the Water

A loft of plastic litter (bottles, bags...) end up in harbours, marinas and canals. WasteShark, a robotic boat by a Dutch company (Rana Marine) takes care of collecting this floating waste. The robot behaves the shark whale style to clean urban waters. Video 1 shows WasteShark in action. Video 1 ...
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DIY 3D printed humanoid robot

Open Source 3D Printed Humanoid Robots

In this post we give an overview of major open source humanoid robots. Existing ones are interesting and seriously compete with the pre-built closed robots such as the Nao. One surprising conclusion is that going the open source route does mean cheap. Indeed humanoid robots have many degrees of freedom ...
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