Mailbox - Sets the ‘sender’ field to “Note To Self” if you send yourself an e-mail.
This is great thinking. I find myself adjusting brightness manually all the time - if I’m looking at photos in a bright room, I jack it up, if I’m reading, no need for full brightness. Good stuff.
www.weatherunderground.com uses spark lines to communicate upward and downward trends of data like temperature and atmospheric pressure.