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SparkFun Electronics will be closed on July 3rd, 2015 in observance of Independence Day. Any orders placed after 2:00pm MT on July 2nd will be shipped out after the weekend. Thanks!

eric53045

Member Since: January 5, 2010

Country: United States

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Electrical Engineering

  • Rather than using an entire microcontroller setup, I used 555 and 556 chips to make blinking Christmas cards this past year for friends and family. They loved the cards and the circuits were simple and fun to make. This chip is great both starting point for beginners and a powerful tool for experienced builders alike.

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