Monthly Archives: January 2017

Lightbulb moment: learning logic gates with switches

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 – which was fine, they really got … Continue reading

Posted in computers, education | Tagged , | 2 Comments

Arduino composite video out using only 3 resistors

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

The truth about cats AND/OR dogs

Here’s an activity I think you could do with almost any year group in KS2 or KS3. You could use it to teach about the origins of modern databases in Hollerith’s punch cards used to collect US census and immigration … Continue reading

Posted in computers, education, ICT | Tagged , , , , | 6 Comments