What is the A=BCD mean in this page, http://mathworld.wolfram.com/EulerAngles.html and how do they get the value of a11 , a12 , a13...a33, i thought it is just multiplication of matrices
lets say if i have a Z-axis which perpendicularly point into the screen, X-axis which point to its right side and Y-axis which point upward and a point with coordinate ( 0 , 0 , 5 ).
then i rotate the point's y-axis 30 degree in clockwise direction.
so the rotation operation matrix should be...
using the point (0,0,5) , i make a rotation of 30 degree in clockwise direction about y axis,
so i should get the rotation matrix of
| cos 30 0 -sin 30 | |x| | cos 30 0 sin 30 | |x|
| 0 1 0 | |y| or | 0...
If i have a point at (0,0,5) in x,y,z system, then i make 2 rotation on the point with center at origin.
i)the first rotation is on y-axis with angle P in clockwise direction.
ii) the second rotation is on the point's new x-axis rotate in angle Q in clockwise direction.
How can i find the...
http://www.circuit-fantasia.com/collections/tools/pnfb-builder.html
I am trying to understand how the V to I convertor work. In that example, I a, not very clear what does this I to V convertor do in this circuit, why would we want to change the I back to V as we want to change the V to I ?
My knowledge about transistor is too low, i have no idea what is FET or MOSFET yet, and i found this http://www.williamson-labs.com/images/e-spring.gif animation interesting, what does the spring mean? Does it mean the resistance increase when it is stretched longer?