Author Archives: blogmywiki

Add a potentiometer to your microbit

Posted on February 14, 2017 by blogmywiki

I had a 10k potentiometer lying around that I saved from some junked electronics – it may have been a volume control or something, I can’t remember. Today I found a use for it when I found this excellent web … Continue reading →

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Dice maths investigation using Scratch

Posted on February 11, 2017 by blogmywiki

This week I did a maths investigation I recall doing myself when I was at primary school – and that was a long time ago! It’s the one where you find out which total scores, if any, are more likely … Continue reading →

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Upcycling old netbooks

Posted on February 5, 2017 by blogmywiki

My school has a large number of old Asus eeePC 1001PX netbooks. They originally had WindowXP on, which obviously is no longer supported so their use was limited. Our IT department had rebuilt them with LXDE Linux for use in … Continue reading →

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Lightbulb moment: learning logic gates with switches

Posted on January 31, 2017 by blogmywiki

I introduced logic gates to year 9 again this year. Last year we did the theory, filled in truth tables and then I got them to built half and full adders in logic.ly – which was fine, they really got … Continue reading →

Posted in computers, education | Tagged , | 2 Comments

Arduino composite video out using only 3 resistors

Posted on January 15, 2017 by blogmywiki

It’s supposed to be easy – 2 or 3 resistors and you can get your Arduino micro controller to produce low-resolution black and white composite video. Well, it wasn’t for me. It took me hours to get it working, but … Continue reading →

Posted in Arduino, computers, hardware | Tagged , , , | 9 Comments