thread404-411498
Just to follow up on an old thread I posted. I determined the issue was a change of how elongation is measured. The requirement I was referencing tested using a 2in gage length. This is the standard default gage length defined by ASTM E8. This is what is generally listed...
Main Question: Is the elongation value of any objective use if the part is designed to operate below yield strength?
I understand that in sheet metal bending or interference fits knowing how much strain a material can tolerate before breaking could be valuable. I have also had it explained...
What is the best and/or standard method for removing a welded electrical connection. Specifically the connection on an automotive alternator rectifier diode stem and the connector assembly is welded. A little glob of copper sitting on the tip of the stem joins the copper runner of the...
I am trying to calculate the force imparted on a rotor bearing when the rotor is at speed and the vehicle takes a hard turn. I can find the rotor moment of inertia and its angular momentum, but not sure how to find the force due to gyroscopic action. Most of the information I have found...
I recently saw something on an oscilloscope that made me wonder how an oscilloscope works. It was a step function, with each step boxed off, having 4 sides. Plus there was a diagonal line inside each box.
The way I understand it, a digital O-scope would sample the probe and should only find...
I was trying to explain how a capacitor works to someone who considered themselves a "mechanical". I used the hydraulic model of a hollow metal sphere with a rubber bladder separating it in half and a port connected to each half, both halves filled with water.
Voltage is pressure
Current is...
I want a part to be white. When I open the appearance property manage and select white color for the part, I get a slightly lighter shade of gray (the default color). In 2008, this usually meant I had a color set for the feature or surface as well. This isn't the case here. Least not that I...
I want to learn how to design a low noise, low current, high temperature, DC-DC HV power supply. Anybody have design notes or books they would recomend? Things like noise compensation and transformer selection/design.
My regards circuit jockeys,
I have a sensor device that is lowered into a well. Its power cable also serves as its data transmission line. The voltage supplied to the circuit is regulated by two zeners in series. This creates two voltage rails, one to power the sensor, the other lower...
I have a long assembly that I want to do an exploded view of. I was making a multiple exploded views for each section of it, and was going to make each section its own sheet in the drawing. The problem is I didn't want the rest of the part just running off the edges of the sheet, so I used a...
What is the differential input voltage parameter on an opamp mean? Does +/- 10V mean I can have a 20V difference between the two inputs not exceeding +10 or -10. Or that any one input as a reference the other can't go beyond 10V from it? What happens if you exceed this number? Does it snub...
I have an amplifier circuit I am tryin to get more gain out of. I increse Rf and the signal is attenuated. I don't understand why. I first thought that if Rf gets to be too much bigger than Ri, then the capacitor can't discharge fast enough for the input to register the next pulse. I tried...
I really like this app. I has a surprising variety of circuits. Good visualization to help you understand what is going wrong. And you can create your own circuits. I don't know how good it is for design purposes, but it is a great learning tool.
http://www.falstad.com/circuit/index.html
I have a input signal of randomly spaced negative sawtooth-like pulses of varying amplitude a few microseconds in duration. This is fed to a differentiator. I understand the capacitor and feedback resistor of the differentiator select the corner frequency of the amplifier circuit. What I am...
This really has me at a loss. I am reading a voltage across diodes when the diode isn't connected to anything. I am testing a circuit, measuring the voltage from the back side of the diode to ground (AC input). I switch off the power and the diode still has around 150mV across it. I unplug...
