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.