Remote control a catapult with an App build with App Inventor

In this previous article we learned how to build an App with App Inventor and connect it to a Lego Mindstorms NXT. Now we will extend that App to control a Catapult robot. If you have not done so already, first build the Catapult. Now that you are able to connect your phone to the … Continue reading Remote control a catapult with an App build with App Inventor

Control a Lego Mindstorms robot with your phone with App Inventor

First steps To be able to use App Inventor, you will have to register with a Google Account. So go to the site ai2.appinventor.mit.edu and register/login. Install the MIT AI2 Companion app on your phone. To be able to identify your NXT (if there are many Bluetooth devices), you might want to change its name: Start the Lego … Continue reading Control a Lego Mindstorms robot with your phone with App Inventor

Checking your Java environment (for use with leJOS)

To use leJOS you need 32 bits versions of the JDK and the Java Runtime Environment (JRE). Also, sometimes after updates of Java or multiple removals/additions the environment can ‘go bad’. Follow the steps below to test the environment and fix it when necessary. Test Java Windows must be able to find Java programs. Therefore the … Continue reading Checking your Java environment (for use with leJOS)

Create a wireless presenter for your presentations with LittleBits

As a demo for a workshop I am giving next week, I created a wireless presenter to use for presentations. The receiver is connected to the computer via the Arduino Bit. The wireless presenter is just a button connected to the Wireless Transmitter Bit. When you press the button, the (powerpoint) presentation advances to the next … Continue reading Create a wireless presenter for your presentations with LittleBits

Test: 60km gelopen op de nieuwe Saucony Triumph-ISO2

Saucony introduceerde onlangs de tweede editie van de Triumph-ISO, die dan ook Triumph-ISO2 gedoopt is. Nieuw in deze schoen is oa. een 5mm tussenzool (Saucony noemt het de EVERUN Topsole) die bestaat uit een laag samengeperste (piepschuim?) bolletjes die je (in verschillende diktes) ook in andere schoenen aantreft. Deze laag is niet zichtbaar aan de … Continue reading Test: 60km gelopen op de nieuwe Saucony Triumph-ISO2