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AUG 12 2022

MK Makerspace at EMF 2022

Between June the 2nd and the 5th this year, a number of Makerspace members joined almost three thousand other makers, artists, engineers and technology enthusiasts and their families in Eastnor Castle Deer Park, the temporary home of the biennial event known as Electromagnetic Field, or EMF.

EMF is a nonprofit camping festival packed with talks, workshops and performances by fellow enthusiasts including a number of popular YouTubers. The entire event is run by unpaid volunteers, notably…

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JAN 01 2020

Updated SD card speed tests

As some of you may know, Jim and I benchmarked a number of SD cards a couple of years ago.

Jim has a blog post here https://mkmakerspace.co.uk/speed-testing-cheap-micro-sd-cards/, and I did 4K block and random tests to establish their suitability as Raspberry Pi boot devices.

Unfortunately the 16GB LD card which was then good value is now rather expensive on AliExpress compared with the competition, so I have been looking for replacements. Several of these arrived recently and are looking…

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FEB 21 2018

Testing LED strip

Many people do not realise how much heat is generated by modern high brightness LEDs. An old-fashioned 100W incandescent light bulb produces around 5% visible light, 83% infrared radiation and 12% heat. An equivalently bright LED bulb might produce 30% visible light and 70% heat. Although the total power consumption is much less (around 17W for the LED), the amount of heat which must be dissipated at the source is almost the same (12% of 100W is 12W, 70% of 17W is 11.9W), and LEDs are easily…

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