Electronic Gingerbread House
Posted: December 13, 2016
While doing my Saturday shopping at a local store I noticed a $7 gingerbread house kit and decided to grab one. The idea that crossed my mind was to decorate the house with electronics, both LED lights and servo motors. I figured the toxic lead inside the solder might help the flavor of the cookies too (just kidding... it's not safe to eat this house anymore).
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A video of the lights on the house flashing and gingerbread people moving. https://youtu.be/nPNxkKRDKsc
Here's the circuit board. The 16 pin micro to the left is the MSP430 which controls 2 strips of LEDs and 2 servo motors using four PN2222 transistors.
Here's the gingerbread house assembled with the 2 LED strips and and gingerbread people on the servo motors. The LEDs are all hooked up in series (6 * 1.8v gives approximately 10.8v forward voltage) running off 12v with a 47ohm resistor. A PN2222 transistor is used to allow the 3.3v MSP430 control the 12v strip of LED's. The two servos are running at 5v and also use PN2222 transistors on the signal line.
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