Recent content by iflabs

Don't know which sub-forum this topic belongs to so I'm sticking it in here. I'm currently at a temp job testing hot melt machines that powers from a 240v 3 phase source. Electrical safety was never really emphasized in engineering school. Is there a standard list of safety protocols or 'do...

Did a little bit more reading on SMPS, complicated power electronics stuff which I haven't study too deeply in. Otherwise the small transformers they use is one of the neatest feature along with variable inputs. But it left me wondering, don't these use a chip for feedback control that requires...

Building a simple linear power supply for a project and need to spec out a transformer. I have no idea how they're built and used in the industry. I was instead handed a 120VAC input with a 24VAC output and 2A max step down transformer. I am content with it for the moment. But I'm looking to...

A sawtooth waveform is given in the time domain with a certain period. How does one go about converting the sawtooth to sinusoid with just resistors, capacitors, and inductors (simple RLC circuit)? We've recently covered filter circuits, so I'm betting we need to pass the signal through some...

Homework Statement I have a vector diagram attached below. Vector A is perpendicular to vector B. How do you figure out what angle to use in order to project vector A onto the x and y axis? Homework Equations A dot B = ABcos(angle) The Attempt at a Solution 180-30-90 = 60?

I can't muster my mind around this. Can you actually plot this vector on a graph at the point? The vector only specifies a length with no direction.

Does the frequency of a sinusoidal voltage or current attribute anything? Maybe more power? All I know so far is that you can filter certain frequencies out with filter circuits.

Hmmm, I missed that part. What does it mean when the gauge pressure is above 14.5psi? I forgot, but why can't you use the celsius scale to do the problem?

[SOLVED] Ideal Gas Law Application Homework Statement One Sunday morning a family takes an automobile trip to Grandma's. At the start of the trip, the temperature is 288K (15C), and the gauge pressure in the tires is 32lb/in^2 (psi). (The gauge pressure is the excess over 14.5 psi, the...

It's a nightmare whenever I see physics problems that involve the change of a variable with respect to another change in varible. Say for example, delta-P/delta-H. The pressure increases as the depth of the water increases. And you want to find the pressure at a certain depth. I see that...

1.) x(t) = a + b*t y(t) = c + d*t + e*t*t a= 70 cm, b=38 cm/s, c=78 cm, d=17 cm/s and e=-490 cm/s/s What is the initial velocity of this projectile? I approached it assuming that the angle is 45 degrees. So I used the pythagorean therom to solve for the hypotnuse given that we...