Recent content by smn

By condition monitoring are you referring to vibration & speed monitoring? We measure various vibrations along gas / steam turbines. We have what we call a relative shaft probe (commonly known as a stinger) which is basically a proximity probe. The probes are gapped electrically to the...

How about a resistor / zener diode configuration?

For 1. - just think, you need to count from binary 0000 to 1001. After this count sequence the counter should reset. Couldn't the two outputs that are high (that represent decimal 9) be used to reset the count?

Hi, Have you no ideas what so ever? Do you have to use d-types for the assignment? Are the counters synchronous or asynnchronous (do they need a clock input) ? Try researching D Type and JK counter circuits online, there's plenty of examples out there.

Yes, i worked out that s=1 and t= -1. I then sub'd these values into the 3rd equation and it satisfied this also ( 4=4). Thanks for all your help Regards Sam

Thanks for the prompt replys. I realize that you have to solve for s and t and these values should equal if the lines intersect. I was unsure what to do next with the 3 equations in order to solve for s and t. I'm now going to try using simultaneous equations, as mentioned, to try and...

Hi, I'm currently revising for a maths exam and I'm stuck on the following question: Show that the lines: r = (i+j+k) + s(i+2j+3k) r = (4i+6j+5k) + t(2i+3j+k) Intersect. My work so far: Let (i+j+k) + s(i+2j+3k) = (4i+6j+5k) + t(2i+3j+k) So (i) 1+s = 4+2t (j) 1+2s =...

Hello, i have a revision question that I'm only part-able to answer. The question is: Explain why an LED operating at a fixed current would be more stable than one operating at a fixed voltage.Consider the effect of the device heating on the IV characteristics.Explain under which condition...

Thanks for your reply, You're correct, it should read: dF/dx = 2/3x^2+2y+2, which i wrote down in my notes!Typo error. When you say, solve them together, do you mean like you do with simultaneous equations? I tried that route but I'm getting confused with what to do with the term...

Hello, I'm trying to complete the question below: Consider F(x,y)=1/3x^3+y^2+2xy+2x+2y+1 Find the 2 stationary points of F and show that one of them is a minimum of F. I've got as far as getting: dF/dx = 2/3x+2y+2 dF/dy = 2x+2y+2 I would like to know what i need to do next (do i have to...

Thanks for your reply Berkemen, Yes, i do have that equation, i think i was looking at the problem a little too deep! The tasks that I've been set are from an old exam paper. They're not 'official homeworks' but in future i will post any questions of this type in the homework forum...

Hello all, I've been tasked with drawing the I-V characteristics of a silicon p-n junction diode and I've managed to do that fine. Now, I've been tasked with showing how this curve will vary with temperature (200-400 deg.c) and by illumination with light of photon energy greater than the...

Hello there, I've been working on the following question: A thin prism with a refraction index of n=1.41 has a top angle of 5.7 degrees. Find the angle of deflection for a light ray that falls on the prism surface : (a) normally (b) At an angle of 4 degrees I have worked out the second...