Lego Mindstorms Colour Sorting Machine

Built this with the kids last weekend, using the Lego Mindstorms EV3 set they bought be for my birthday. It was the first project we have built without a set of instructions.

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How to create a private key for signing Android apps

To create a private key to sign your Android apps with, you need to run the keytool command (installed when you install a Java development kit) as follows.

keytool -genkey -v -keystore myandroid.keystore -alias myandroidkey -keyalg RSA -keysize 2048 -validity 10000 -dname "O=Acme Ltd"

Replace Acme Ltd with your company name.

When the tool runs it will prompt you for a password and then generate a file called myandroid.keystore. You will need this file, your password and the key’s alias (myandroidkey in this example) to sign your app.

To see the details of your key use the following command:

keytool -list -v -keystore myandroid.keystore

For more information see the Link to Signing Your Application page page in the Android developer’s documentation.

Creating an abstract desktop wallpaper in Blender

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Writing a game using PICO-8 – Part 2

Finally got over a cold so I could record part 2 of my tutorial :)

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You can play the game here on the PICO-8 website


Writing a game using PICO-8 – Part 1

My first attempt at YouTube video/tutorial thing. Gonna try to get one of these done a week…

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