Recent content by _Bd_

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    Max Tolerance stack-up

    My main concern is when the pin drops down how well aligned it will be with the hole on the PCB. I can start from the pin and work my way back, assuming the Pin's axis is the main daturm.
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    Max Tolerance stack-up

    Hi, I've been reading about stacking up tolerances. It's the first time in working with them. I understand the gist of it and I've seen a few simple examples however when I move onto my project I keep getting lost as I dont know what and where do they stack and if I should just add them up or...
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    Solidworks thermal simulation: is this logical?

    Hey Guys, I'ma bump this thread with another question regarding the same model (or a very similar one). In the OP you can see the two chunks of metal (named heat spreader) Those pieces are 6"x6"x1", with a whopping volume of around 35 cubic inches For experiment's sake I decided to change...
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    Solidworks thermal simulation: is this logical?

    That makes perfect sense! thank you. I completely forgot to think in terms of volume rather than mass. . .for some reason I assumed the same mass since it was the same piece. . Thanks!
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    Solidworks thermal simulation: is this logical?

    I just ran 2 simulations on Solidworks, same assembly, same initial conditions on all pieces, pretty much I "Cloned" the thermal study and just changed one piece So, from the assembly above you can see the materials for most pieces, the 2 grey pieces in the center are 2 aluminum plates with a...
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    Thermal Conductivity of Springs

    Yeah, that might be it, I appreciate the quick analysis. The thing about this particular application and why we came up with this debate is because when you press down on it the temperature drops (counter-intuitively) you would assume the temperature should increase when you press down on it but...
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    Thermal Conductivity of Springs

    I agree with Akin's law of spacecraft however I am looking for EDUCATED OPINIONS, based on heat transfer laws we've learned. If you want some more details that could help do a more educated guess. Please note I am not looking for exact numbers, I am looking if there is an obvious answer or not...
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    Thermal Conductivity of Springs

    I have a question that I've been debating with some co-workers. We are using conical springs (tapered) that most of the time in our application fully compress once engaged. We are measuring minute changes in temperature and I was wondering if a spring diffuses more heat compressed or relaxed...
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    Maximizing insulation (conduction, convection and radiation)

    Hi, Its been a while since I had my thermal heat transfer classes and Im a little skeptical on what I remember. Im trying to insulate a copper block, the sides are covered by an insulating material which has a low thermal conductivity (they are touching). Howver there is a surface on the top...
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    Increasing Flow rate through system

    Hi, I'm building an experimental set-up for some heat exchanger I'm trying to analyze, I want to maximize the flow through this little piece. I have a stable temperature bath, (see picture) that has an evacuation valve on the bottom. I only took introduction to Fluid Dynamics (found it amazing...
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    Small Machined springs

    Hi, I usually buy off-the-shelf springs, however I am working on a design that requires some very specific features on each side of the spring (if possible), however this is a very small device, (its a probe). Anyways, I was thinking of getting a machined screw, as I've seen some very good...
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    Designing with Thermal expansion in mind

    Hi, Im trying to design a tubular probe thats made of stainless steel (304), from what I've read it has a Thermal expansion coefficient of around 9.6 x10^-6 in/in/F give or take on the quality. I want to fill this tube halfway with an Epoxy, however from what I've read this epoxy has a thermal...
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    How to read lots of inputs

    I dont really understand that link very well, from what I gather its a whole device in itself right? The thing is that I am trying to make a probe for a meter I already have. I already have the meter with a very good processor that can measure up to .002 C. the problem however is the actual...
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    How to read lots of inputs

    Well, the EEPRROM has a single in/out wire, a Vcc and a GND. I am still researching to see if I can share ground with the resistor, if thats the case I will only use 4 pins: 1- GND 2- Resistor 3- Vcc 4- Data In/out if its not possible I will use all 5 pins: 1 - GND 2 - Resistor 1 3 - Resistor...
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    How to read lots of inputs

    Ok, thank you for the reply. The sensors are a set of values: Each sensor has a 5 pin-interface (Only 4 pins used): Pin 1 and 2 go to a temperature-dependant resistor (so an analog device) Pin 3,4 go to an EEPROM, that stores the calibration values of the resistor in place (it contains the...
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