Author Archive

Muhnah MuhBot!

Posted in 7. A Mechanical Automaton on October 18, 2009 by danrapoport



Check this out – I couldn’t figure out how to embed Vimeo so please take the time to click the link – it’s appreciated.

Thanks, Dan.

Muhnah MuhBot! from Dan Rapoport on Vimeo.

I used an erector set to animate the mouth of my Muppet. The design is fairly simple and incorporates an rotating motion converted into an up-down motion via an off-center wheel on an axis and a rod.



Walk the Walker

Posted in 6 Form & Motion, Uncategorized on October 9, 2009 by danrapoport

I built a simple one-legged walking robot using a servo motor, an arduino board, and an erector set. The robot gets “tired” and one must nudge it along via a touch sensing switch on its leg.

6_1_schemArduino Sketch: Asst6_1

Scavenger Hunt!

Posted in 5. Treasure Hunt on October 1, 2009 by danrapoport

Flex Sensor

Stretch Sensor


Alcohol Sensor
$4.75 (x100)


Linear Actuator

Fiber Optic Cable

Tiny Potentiometer
$.08 (x500-999)

Conductive Fabric
$4.95 (per foot)

Thermochromic Paint

$1.22 (3 feet)

Conductive Paint

Neodymium Magnets

Copper Foil

Tilt Sensor

Peltier Junction

Strangest Arduino Component:


Posted in 4. Analog Input-Output on September 25, 2009 by danrapoport

My post is especially non-spectacular, yay archie + crew schedule!





Arduino Sketch: Asst4_4

Arduino Sketch: Asst4_3

Arduino Sketch: Asst4_2

Arduino Sketch: Asst4_1

Thumbdrive Switch

Posted in 3. Digital Input-Output on September 17, 2009 by danrapoport

I chose to make my switch out of a modified thumbdrive.

Arduino Sketch: DanRapoport_Asst3_4

Arduino Sketch: DanRapoport_Asst3_3

Arduino Sketch: DanRapoport_Asst3_2




The Roaming Clock

Posted in 2. Buttonless Clock on September 10, 2009 by danrapoport
Roaming Clock

Roaming Clock

I designed a clock based on gravity.  It is approximately 2 feet in diameter and has one large hand.  In order set the clock, one must push it one notch counterclockwise. Gravity then drags the hand straight downward, and the user can roll the clock to whatever time it is based on one of twelve notches on the side of the clock.  To re-enter time mode, the user once again roles one notch conuterclockwise.  When the clock is set, it rolls so that the hand always faces directly upright all day, and the number rotate.  The clock moves in a cricular pattern, and its location is predictable based on time of day.

Not recommended for small rooms.