Anatomy of the TC1

kasper,ted and james

January 26, 2016

Milne’s lamp post seismometer (1910)

Scientific American, 1979

Ted Channel’s TC1 (2007)

Anatomic Lesson

Anatomic Lesson of the TC1

Parts to the TC1

1. Slinky:

when an earthquake shakesthe ground, a magnet attached

to a Slinky toy moves

2. Coil: a moving magnet creates

an induced current in this coil

3. A/D Conversion:

an Arduino Uno receives the induced current, and convertsthis analog signal to a digital one 4. USB:

Finally, the digital signal from the Arduino goes to the computer

connected to this screen

Slinky

Slinky

Slinky as the spring in a harmonic oscillator

Converting a bouncing magnet to a measurable voltage

Magnetic induction is the interplay between changing magneticfields and currents

Damping an harmonic oscillator

Damping with a magnet

Damping with Lenz’s Law

Lenz’s Law is the electromagnetic version of Newton’s third Law:For every action, there is an equal and opposite reaction.

AD conversion and filtering

1. Slinky:

when an earthquake shakesthe ground, a magnet attached

to a Slinky toy moves

2. Coil: a moving magnet creates

an induced current in this coil

3. A/D Conversion:

an Arduino Uno receives the induced current, and convertsthis analog signal to a digital one 4. USB:

Finally, the digital signal from the Arduino goes to the computer

connected to this screen

Let’s put the TC1 together, and then Martin will tell us about theAD conversion and filtering of our signals.