Recent content by thshen34

Right, the size can be anywhere around 1/4in or 6mm in diameter. I'm mainly using these as bearings and not to transmit torque, as part of a Stewart platform/hexapod motion platform.

Does anyone know a manufacturer or supplier of joints like the one shown here: https://grabcad.com/library/universal-joint-graphite-bushes The main feature I'm looking for is the counterbores at the ends that allow mounting to a flat plate. Almost all the ones I've found are made for...

Would it be possible to add a transistor in between the LED and the driver, as shown in the application photos, to PWM and fade the LED with 0-5V logic (Assume the LED has a forward voltage of 3V)...

Ok, thanks for your input. Would you be able to draw a small schematic on how to use a 5V power supply? I was using a smaller version of the Arduino so I figured less voltage would be better, but maybe I can do 5V. I'm only vaguely familiar with how a constant current driver works. Do you mean...

Hi all, I'm trying to PWM a high brightness LEDs in parallel (http://d114hh0cykhyb0.cloudfront.net/pdfs/spmwht5225d5waq0s0.pdf) and I was hoping to use an Arduino and a CAT4101 driver (http://www.onsemi.com/PowerSolutions/product.do?id=CAT4101). I was hoping that someone could tell me if this...

Hi, What would be the approach to getting a good estimate of the amount of force needed to stamp an American quarter? (This is assuming you have the blank already made) I'd like to get a good estimate, but more importantly an idea of what numbers go into this estimate, i.e yield strength...

Homework Statement f = x^2 + 4xy + y^2 + 6x + 8 Find minimum, maximum, or saddle point Homework Equations A = [f_xx, f_xy; f_yx, f_yy] The Attempt at a Solution Found the determinant to be zero ( i got [2 ,4; 4, 2] ) so i can't use the eigenvalues to determine the extrema. now...

Hi, Thanks for your input, but isn't this supposed to be done using the Navier Stokes equations? That is how it was done for one layer. Could you provide some equations with what you are saying? Thanks

Following this example, http://www.creatis.insa-lyon.fr/~dsarrut/bib/others/phys/www.jwave.vt.edu/crcd/batra/lectures/esmmse5984/node53.html I know you can solve for v by integrating the equations along with boundary conditions. How would you solve a problem where you have another...

Hi rude man, I appreciate your help, but that doesn't make any sense to me. I'm looking at this as a fluid going through a pipe bend problem, and it's a very easy one. The net force of the fluid on the pipe in the y direction is ρVQ - ρVQcosθ (up) and the force in the x direction is ρVQsinθ (to...

Hi rude man, Thanks for the reply. I understand what you are talking about, but from my understanding is that none of the forces from the fluid are normal to the axis. they point down and to the right, as I stated before. For angular momentum, the force would have to come either out of the...

Homework Statement Consider a steady flow of liquid with a density of 805 kg/m3 through a rotating tube as shown in the sketch. The flow speed is V = 5 m/s. If ω = 10 rad/s, find the torque necessary to rotate the pipe. Assume a uniform velocity distribution at the exit from the pipe, and...