Data Sheet

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307. Susceptance
Replace the switch (62) with the press switch (61) in project #302. Press and
hold the press switch (61) and you will hear some medium volume sounds of a
police siren from the speaker (93). Also, you will see the star LED (70) is ashing
at the same time. Susceptance is the measure of how easily (or susceptible) a
circuit or input is to the ow of AC current due to inductance or capacitance.
308. Relation between Conductance, Susceptance,
and Admittance
Connect points C and D with a 4-wire (4) in project #307. Press and hold the
press switch (61) and you will hear gun shots in medium volume and the star
LED (70) will ash at the same time. Admittance is the ease to which all types
of current can ow, due to resistance, capacitance and inductance. So you can
think of admittance like the sum of conductance and susceptance.
309. Linear Circuits
Connect points A and B with a 4-wire (4) in project #307. Press and hold the press
switch (61) and you will hear a re siren in medium volume and the star LED (70)
will ash. A linear circuit is dened as one where for any sine wave input of any
frequency, the output of the circuit is also a sine wave with the same frequency.
310. Superposition Principle
Connect points E and F with a 4-wire (4) in project #307. Press and hold the
press switch (61) and the sounds of space battle will turn on in medium volume
with the star LED (70) will ash. Another way to dene a linear circuit is that it
has to meet the superposition principle. The superposition principle states that
any linear combination of input signals will lead to an output equal to the linear
combination of the output signals from the individual input signals.
311. Superposition Principle Equation
Connect points G and H with a 4-wire (4) in project #307. Press and hold
the press switch (61) and you will hear music in medium volume and the star
LED (70) will ash to the music. The superposition principle discussed in the
previous project can be stated in formula form, where the function F[ ] is linear
if and only if:
F[a*X
1
(t) + b*X
2
(t)] = a*F[X
1
(t)] + b*F[X
2
(t)]
Where a and b are constants, X
1
( ) and X
2
( ) are the input signals and t is time.
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