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"base:title": "0oo - Sunrise WakeUp Screen"
"og:title": "Sunrise WakeUp Screen"
"og:description": "These days, computer screens are quite abundant, but few have &quot;Wake Up Lights&quot;. So, we could use computer screen as a morning light simulator. Here is a hint, if you&#x27;re on Linux: 1. Check available screens connected: `xrandr -q | grep &quot; connected&quot;` 2. Set screen brightness: `xrandr --output HDMI-1 --brightness 0.5` Ok, now, let&#x27;s say you&#x27;re interested in sleeping at 15:30 UTC, and waking at 0 UTC... You could simply do, something like this in Python: &lt;pre&gt; import os import time device = &#x27;HDMI-1&#x27; # Let&#x27;s say we sleep 1/3 of day, and sun # starts setting 0.5 hr …"
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"item:parent:intents": [{"url": "/intent/1215/", "title": "Time Technologies"}]
"item:title": "Sunrise WakeUp Screen"
"item:summary": "Simulate sunrise with computer screen."
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"item:body": |
    These days, computer screens are quite abundant, but few have "Wake Up Lights". So, we could use computer screen as a morning light simulator.
    
    Here is a hint, if you're on Linux:
    
    1. Check available screens connected:
    
    `xrandr -q | grep " connected"`
    
    2. Set screen brightness:
    
    `xrandr --output HDMI-1 --brightness 0.5`
    
    Ok, now, let's say you're interested in sleeping at 15:30 UTC, and waking at 0 UTC...
    You could simply do, something like this in Python:
    
    <pre>
    import os
    import time
    device = 'HDMI-1'
    
    # Let's say we sleep 1/3 of day, and sun
    # starts setting 0.5 hr before sleep:
    sun = {'rise': 1.0, 'set': 2/3 - 0.5/24}
    
    fade = 0.025 # amount of day to use for fading
    lbound = 0.05 # minimum amount of brightness
    ubound = 1.0 # maximum amount of brightness
    brange = abs(ubound-lbound)
    
    while True:
        now = (time.time()/86400.) % 1
    
        # night
        if sun['set'] <= now <= sun['rise']:
            fadepart = lbound
    
            # sunset
            if sun['set'] <= now <= sun['set']+fade:
                fadepart = lbound + brange - (now - sun['set'])/fade * brange
    
        # day
        elif sun['rise'] <= now <= sun['set']:
            fadepart = ubound
    
            # sunrise
            if sun['rise'] <= now <= sun['rise']+fade:
                fadepart = lbound + (now - sun['rise'])/fade * brange
    
    
        print(fadepart)
    
        os.system(f'xrandr --output {device} --brightness {fadepart}')
    
        time.sleep(5) # check every 5 secs.
    </pre>
    
    This might actually work...
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"item:owner": "Mindey"
"item:created": "2021-11-26T15:57:20.055790"
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