Item 1 - Dancing Frog

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Main Function

The main function of the object that was frog was to sing and dance to the song "It's Five o'colck Somewhere". This was done by pressing a button located inside the foot of the toy.


The frog would need to properly respond when the activation button is pressed. It also needs to function in a way that is safe for anyone who is going to be using the toy.


Interactions with Humans

The only way that the toy is able to interact with humans is by the push button located inside of the foot of the frog. Pressing this button causes the frog to begin singing and dancing. Once the song has finished playing, the frog turns off and does nothing until the botton is pressed again.


Interactions with the World- Sensing

The toy has no real way to sense any changes in the outside world.


The mouth of the frog is able to open and close. The head can rock from side to side and one arm is able to move up and down. All of these motions are synced with the song playing so as to appear like the frog is singing and dancing to the song. This motion is accomplished by two small DC motors, one located in the head and one at the base of the frog.

Power Supply

3 AA batteries are used to power the two motors and the speaker that plays the song.


Power Conversion

Both motors have some sort of power conversion system attached to them. The motor in the head has an attached gear train the runs from the back of the head to the jaw of the frog. This slows down the speed of the motor and increases its torque.

The motor at the base is attached to a pulley that slows it down and helps to prevent the motor from being fried. Then it is taken through a gear train that slows down the motor even further. This is also done to move the rotating shaft up from the base to the middle of the frog.


Motion Conversion

The rotation of the motor at the base of the frog is turned into a tranlational motion by the use of a slider mechaism attached to a rotating wheel. The slider is attached to a link that forces the head of the frog to rock from side to side. This motion is coupled with the motion of the arm because the arm is fixed to the slider link.



The frog has a small circuit board that stores the song to be played as well as the instrucitons for matching the motion to the song.