Khan Academy

Coulomb's Law (K-A)

Electric potential energy (K-A)

Proof: Field from infinite plate (part 1) (K-A)

Proof: Field from infinite plate (part 2) (K-A)

Finding Fourier coefficients for square wave (K-A)

First term in a Fourier series (K-A)

Fourier coefficients for cosine terms (K-A)

Fourier coefficients for sine terms (K-A)

Fourier Series introduction (K-A)

Integral of product of cosines (K-A)

3rd graders build robots at Santa Rita Elementary School (K-A)

Integral of product of sines (K-A)

SPDT switch (K-A)

Integral of sin(mt) and cos(mt) (K-A)

Spout battery configuration and polarization (K-A)

Integral of sine times cosine (K-A)

Spout lights (K-A)

Visualizing the Fourier expansion of a square wave (K-A)

Spout motor (K-A)

Spout's reversing circuit and final assembly (K-A)

Spout's sliding SPDT switch (K-A)

5 volt power distribution board (K-A)

Arduino connections (K-A)

Batteries/power (K-A)

Power connector for the Arduino (K-A)