Egg clock (it’s egg-ceptional)

Easter is over and with some plastic eggs still on hand, [Franspaco] was looking for something to do with them. He decided to use an egg as an enclosure for a digital clock.

You can see that the finished project uses just one 7 segment LED display to show the time. A scrolling number method is used to delineate each digit of the 24-hour time readout. The display will go blank, followed by two numbers for the hours, a dash as a separator, and finally two more digits for the minutes. A PICAXE microcontroller drives the clock, but for accuracy a DS1307 does the timekeeping.

[Franspaco] etched his own circuit board that is sized to fit perfectly, housing the two chips, an LED, and a programming header. The on-board LED blinks at 1 Hz, giving some inner glow to the plastic shell. He accomplished most of his goals, but was unable to fit the batteries inside of one egg, prompting the need for a tethered power-egg. If he moves to surface mount components for the next generation of this device we think he’ll have no problem fitting a small battery (like an A23) inside.

Comments

  1. strider_mt2k says:

    Well that’s just plain cute.
    Nice!

  2. EFH says:

    Build quality could be better, but nice little project.

  3. Stonehamian says:

    Cool, interesting idea. I like small, simple projects like this.

  4. imp999 says:

    Analog would be way cooler.

  5. Ren says:

    It’s eggzactly 4 o’clock.
    [groan]
    It needs an egg timer function.
    [grin]

  6. otomoton says:

    Maybe in a future version he can get a small li-ion or something in there and make an inductive charger. He could make a whole dozen and turn an egg crate in to the charging base.

  7. twopartepoxy says:

    @Ren
    you crack me up.

  8. denispax says:

    Very interesting and colourfully.

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