Transcript Theremin.... YA!

Theremin.... YA!
Kyle Swanson
Daniel Hamilton
Laurel Hardiman
The Hand
The Antenna
NPN-Transistor
C
B
E
Waves
Products
Sin(kx) + Sin(lx)
= ⅟₂∙x
[ Cos(k + l) + Cos(k – l) ]
20Hz-20,000Hz
A little bit o’ fact…
Leon!
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Born in Russia in 1896
Began playing with electricity at the age of 
7 and had his own laboratory at the age of
17
He was pretty much a genius…
He was tasked with developing a proximity
censor, and voila!
Created the “etherphone” in 1920 and gave
his first performance to a handful of
collegues
Was termed the “Termenvox” in the Soviet
Union, “Thereminvox” in Germany, and
“theremin” in the USA.
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Even this guy liked it!
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Lenin was very impressed byClick
Theremin’s
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Believed Leon’s electronic skills could be used for
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the good of Communism
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He even took lessons
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The original form of Electronic Music
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The theremin was patented in 1928 in the USA
Though not a huge hit, Clara Rockmore helped
popularize the instrument
In 1930, Leon gave a concert at Carnegie Hall with
10 other thereminists. It all fell apart.
In 1932, Leon conducted the first ever electronic
orchestra
Theremin began to lose popularity until the 1950’s
The RCA Theremin
Theremin Extravaganza!
Enter Moog!
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Robert Moog began building theremins while in
high school
He started selling kits so people could make their
own and now Moog Music sells top-quality
theremins
Another burst in popularity occurred when in 1994,
a film was made called “Theremin: An Electronic
Odyssey”
Famous Performers
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Clara Rockmore
Lydia Kavina
Pamelia Kurstin
Armen Ra
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Similar Instrument
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In Good Vibrations (the Beach
Boys)
They
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Similar, but has a slide and the keys
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Where you may have heard one
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Monster House
Ed Wood
The Day The Earth Stood Still
Jimmy Page used a variation of the theremin for
“Whole Lotta Love” and “No Quarter”
The Process
The Trials, The Errors,
The Advancements,
and what turned out
to be setbacks
disguised as
Advancments.
Inductance
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How does one measure inductance?
One way is to use a multimeter that has ability
to measure inductance. EASY PEASY BRAIN
DEAD WAY!!!
However with out a special multimeter, that allows
the user to be brain dead, there is a method
involving network analysis to measure
inductance.
(This is not to say that one should not use or
obtain a multimeter with the ability to measure
inductance. Quite frankly being brain dead once
and while doing repetitive work is not such a
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The non-Zombie Way
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Step 1: Look for a really god awful looking
equation, that looks to be over ones head.
V2
i ˙ L˙
=[
V1
R i ˙ L˙
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− i ˙ L˙ 1/2
]
R− i ˙ L˙
Step 2: Go to take a break, soccer anyone?
Step 3: Widdle it down from a gross equation to
an understandable, efficient, useable, easily
applicable, beautifully widdled equation.
Otherwise known as U.E.U.E.A.B equations.
DUhhhhhh.
The U.E.U.E.A.B equation
of the gross equation.
R
L=
2 ˙ F˙ ˙3
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Now that we have this U.E.U.E.A.B equation.
Our next step is to construct ta circuit that we
can take advantage of with this formula.
Network Analysis
R
L=
2 ˙ F˙ ˙3
This circuits needs:
1. A resistor of known value.
2. A function generator to push a frequency
through the circuit.
3. A bunch of inductors to test. For with out these
this whole set up would be in vane!
≫
Our Findings
Using a resistor of 480 Ohms, we calculated the
Henries for several of the hundred or so
nameless inductors we were searching through.
R
L=
2 ˙ F˙ ˙3
44.1
L=
f