The classic concept of an hourglass taken into the modern world of electronics.
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Operating the hourglass is pretty simple.
Once the hourglass has elapsed the current time setting is saved to EEPROM. This way the setting is preserved even when the Bits-of-Time are powered down.
On the first PixBlock use solder wick to remove excess solder from the pads for the microcontroller. Then solder the controller to the board.
Assemble the three push buttons and the pin header. The pin header is the ISP connector which you will use for programming.
The inclination switch is connected between GND (CON5, pin 1) and PA3 (CON5, pin 6). Attach it such that the switch is open when the hourglass is upright, and closed when the hourglass is upside down. To suppress vibrations it might be beneficial to connect a capacitor (e. g. 1 µF) in parallel with the switch.
Just need the drowning man in the old TV show "Time Tunnel" OP sequence.
https://www.goodreads.com/author_blog_posts/8043353-outr-intro-the-time-tunnel-1966
This is great! ... One more thing to add to my "To build" list
fab4U
Doug LaRue
Raunaq Bose
TheThirdMan
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