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Observer Pattern Made Easy with Pharo Lightweight Observer

Observer Pattern Made Easy with Pharo Lightweight Observer Observer Design Pattern implementation in Pharo

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 in mind beginners such as […]

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

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

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 are hilarious! The first project […]

Farmers Market App: Find Fresh Locally Grown Food

Farmers Market App: Find Fresh Locally Grown Food farmers market pharojs mobile app

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 locally grown food you contribute […]

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

How to Make a Large Lighthouse Using a Cheap 3D Printer Large 3D printed pharo lighthouse

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 the maximum printing height. The […]

Robots To Collect Garbage Floating in the Water

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 shows WasteShark in action Plastic […]

Open Source 3D Printed Humanoid Robots

Open Source 3D Printed Humanoid Robots DIY 3D printed humanoid robot

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. Usually more than 20 servo […]

ArbotiX-M: The Arduino Compatible Board for Robots with Dynamixel Servos

ArbotiX-M: The Arduino Compatible Board for Robots with Dynamixel Servos arbotix dynamixel servo with arduino

The ArbotiX is an open hardware (GPL 3 license) Arduino compatible board that can control up to 30 Dynamixel servo motors. It is ideal for building robots of various kinds (Legged robots, Robotic arms, …). In the following, we provide you with a detailed description of the ArbotiX-M board and its characteristics. Our code samples […]