Light Log Brighten your day Gary C. Martin @lightlogproject - - PowerPoint PPT Presentation

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Feb 13, 2023 296 likes •491 views

Light Log Brighten your day Gary C. Martin @lightlogproject gary@lightlogproject.org www.lightlogproject.org Supported by New Media Scotland's Alt-w Fund with investment from the Scottish Government Gary Martin @lightlogproject

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Light Log

Brighten your day

Gary C. Martin gary@lightlogproject.org @lightlogproject www.lightlogproject.org

Supported by New Media Scotland's Alt-w Fund with investment from the Scottish Government

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Gary Martin @lightlogproject www.lightlogproject.org

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Seasonal Affective Disorder research (self organising map ~250 terms)

Gary Martin @lightlogproject www.lightlogproject.org

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Gary Martin @lightlogproject www.lightlogproject.org

–Mark S Rea*, Andrew Bierman, Mariana G Figueiro and John D Bullough: A new approach to understanding the impact of circadian disruption on human

health. Journal of Circadian Rhythms, 2008

“…circadian disruption negatively affects human health…”

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Gary Martin @lightlogproject www.lightlogproject.org

Sat Bir S Khalsa, Megan E Jewett, Christian Cajochen, and Charles A Czeisler: A phase response curve to single bright light pulses in human

subjects. The Journal of Physiology, 2003

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Gary Martin @lightlogproject www.lightlogproject.org

Direct sunlight 32,000-130,000 lx Indirect sunlight 10,000-25,000 lx Overcast day 100-1,000 lx Office 320-500 lx Home lighting 50-150 lx Dim laptop screen 18 lx Twilight 10 lx Full moon 1 lx Light therapy 2,500-10,000 lx

Gary Martin @lightlogproject www.lightlogproject.org

Lux

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Gary Martin @lightlogproject www.lightlogproject.org

Match flame 1,700 K Candle, sunset/sunrise 1,850 K Incandescent light bulb 2,700-3,300 K Midday sun 5,500-6,000 K Daylight overcast 6,500 K Shade in daylight 7,500 K LCD / CRT 5,500-10,500 K Clear blue sky 10,000–27,000 K Moonlight 4,000 K Gas-emission lighting Fluorescent & neon lighting

Colour

Gary Martin @lightlogproject www.lightlogproject.org

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Block diagram

Gary Martin @lightlogproject www.lightlogproject.org Gary Martin @lightlogproject www.lightlogproject.org

PIC Microprocessor 64Kb Memory I2C bus Red photo sensor Green photo sensor Blue photo sensor Clear photo sensor Serial link LED Desktop/Laptop LED LED Mobile Device 3V, 240mAh Battery Button Planned features Implemented features

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Gary Martin @lightlogproject www.lightlogproject.org

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Gary Martin @lightlogproject www.lightlogproject.org

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Gary Martin @lightlogproject www.lightlogproject.org

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Gary Martin @lightlogproject www.lightlogproject.org

Red, green, blue raw data

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Gary Martin @lightlogproject www.lightlogproject.org

True colour ‘porridge’ False colour

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Gary Martin @lightlogproject www.lightlogproject.org

Colour spectrum mirror Colour spectrum stacked

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Gary Martin @lightlogproject www.lightlogproject.org Gary Martin @lightlogproject www.lightlogproject.org

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Gary Martin @lightlogproject www.lightlogproject.org Gary Martin @lightlogproject www.lightlogproject.org

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Gary Martin @lightlogproject www.lightlogproject.org

Acknowledgements

Supported by New Media Scotland's Alt-w Fund with investment from the Scottish Government New Media Scotland Centre for Design Informatics Scottish Government Project Ginsberg NHS 24 Creative Scotland

Gary Martin @lightlogproject www.lightlogproject.org