Hi folks. Here’s the problem: I’m working on simplifying the manufacture of some geophysical equipment which involves running an AC signal (typically around 300-500 Hz) through the ground. We typically see around 1A of current in the ground at voltages up to 300V. The circuit is composed of a...
Hello,
I've got two low-level audio-frequency analog signals -- we'll call them A and B. I'm designing a circuit to give me an output of either A, B, or A+B, with the simple logic being handled by two multiplexers and summing by an op amp inverting summing amplifier (e.g...
I've run into a problem in Pro/E Wildfire 4.0 that I can't seem to figure out. I'm making an assembly involving a shell part and then a head part which was modeled (top-down) from the assembly based on the shell outline. After putting in extensive work on the complex head part, I added a few...
I'm fairly new to Pro/E (SolidWorks user) and am having a repeating problem with the error listed in the subject line: "an object with that name already exists". Basically, I'll create a part, add it to the assembly, then decide I want to completely redesign the part, so I delete it from the...
I'm designing a portable geophysical instrument to be enclosed in a carbon fiber shell. This shell will have a cross-sectional shape and area similar to a 5" square, with a 1/8" wall, a 2' length, and will be closed on both ends. As the instrument will be used in hot desert conditions, and is...
I'm designing a portable geophysical instrument to be enclosed in a carbon fiber shell. This shell will have a cross-sectional shape and area similar to a 5" square, with a 1/8" wall, a 2' length, and will be closed on both ends. As the instrument will be used in hot desert conditions, and is...
I'm using Pro/E Wildfire 4.0. I have a shell part and am designing a head to snap to the top of the shell. Obviously I would like to reference a sketch in the head part to the shell, so that any slight changes in shell dimension are reflected in the head design. I figured out how to do this by...
