What is Device: Definition and 530 Discussions

CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems. It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system's DOS BIOS (typically residing in IBMBIO.COM or IO.SYS) during boot. CONFIG.SYS was introduced with DOS 2.0.

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  1. L

    Optimal amount of CO2 to purge air in a device

    <Moderator's note: Moved from a homework forum.> Dear team, I wish to use CO2 to de-air a device by exploiting the physical properties of CO2 as a heavier, more dense gas to air and therefore displace air in a very thin tube that has a nozzle at the end where both air and CO2 can escape. I wish...
  2. J

    What device can produce magnetic fields Iooking to buy

    I’m looking for a device to produce electromagnetic fields and how can u control the frequency emitted looking to build or purchase looking to experiment any information either reply publicly or inbox me
  3. D

    How much power/Electrical energy would this device produce?

    Hey, i don't know much about physics but i have heard that gravitational energy is non efficient since it needs a lot of power. So this is what i had in plan.. Average household has 2 to 3 members with each waiting average 50 kilos. You would use their combined weight force to pull up a 1000...
  4. F

    How does a metering device on an A/C lower the pressure?

    Preface: Some people call the metering device on an air-conditioner the "expansion device". When I refer to the metering device in this post, metering device is synonymous with expansion device. ______________________________________________________________________________________ I'm a...
  5. E

    Slowly Rotating Device For a Camera Pan Timelapse

    Hello all! I just discovered PF as I have been searching about a project I have been pondering for a day. The idea is to have a device that I can set my 3lb camera and have the device rotate left-to-right && || right-to-left over the duration of 2 hours for use in a sunset/cloud timelapse...
  6. G

    I Send the measurement device through a double slit

    Hi. Double slit experiments are being performed successfully with increasingly large molecules. Some physicists (e.g. Anton Zeilinger) believe it might work with viruses as well. Assuming it works with a system that qualifies as a measurement device (be it a virus or something else complex...
  7. T

    Can You Build a Simple Signaling Device for Equipment Management?

    I'm not sure I'm posting in the right category or even on the right forum but I need some guidance on building a simple signaling device. I want to make or buy a device that when installed on a piece of rental equipment a person can push a button and it sends a signal back to my office and...
  8. TechTree

    Computer What device would I need to send data over power lines?

    Hello, I'm trying to send binary data over the power lines to a microcontroller, which triggers a relay turning on a light. I was wondering what kind of device would I need to use to achieve this? And how would I connect it up to the microcontroller? I'm fairly new to this, so if someone could...
  9. GoodPost

    Help me make my first electronic device

    Hello all. I'm a guy with big interest into electronics. I have multiple ideas that want to realize in real devices but yet I have only my introduction course in electronics I studied in college as a background. As a first step I want to make an easy electronic device but I have no idea where...
  10. T

    Fesability of a micro LoJack type device.

    Hi All, I would like to make a glove with a small transmitter antenna on the index finger. A small receiver similar to a LoJack device would track the finger. The device would need to be extremely accurate to follow small movement (1 mm?) of the transmitter. I’ve made a device that uses an IR...
  11. A

    Resistance of a non-ohmic device from its I/V graph

    What is the resistance of Device Q when a current of 200mA flows through it? Wouldn't the resistance of the device be approaching 0 Ω as its characteristic resembles one of a diode (gradient = 1/R)? Apparently, the answer is just using V = I R, and solving for the resistance. Is there...
  12. smallville2010

    Electrical Device for Electric Scooter, to get the speed?

    I want to do an application that can connect to my Electric scooter (the kind you stand on) and can get a speed and engine temperature readings, i'm looking into a device i can attach to the wheel or a temperature gauge i can attach to the engine and get a reading from both of them something i...
  13. YoungPhysicist

    Plumbing Build a Buoyancy Device: Ideas for Suspending in Water

    I want to make a device that can suspend in water via manipulating its density to as close to 1 as possible. I just thought that it will be cool to have a device that can stay in whatever position that I place it in the water. Any idea of how this could actually be done? I was thinking about an...
  14. TheQuestionGuy14

    Time related story plot device question

    Hi. So I have a story idea and my main plot device has something to do with time. I want it to be a more science fiction than fantasy so I was hoping someone could help me. The general idea is, a man falls asleep only to wake up 20 years in the future, in one night, he cannot remember the last...
  15. W

    Windows 10 Not recognizing Device (Android ZTE)

    Hi All, I am trying to transfer files from my ZTE971 Android into my Windows 10 PC. Problem is computer is not recognizing the Android when I plug it into the USB port. Strange, since it used to recognizing it without any problem just a few months back. I have checked in device manager...
  16. SilverJW

    Bicep curling spring device questions

    Dear Forum, Please advice. I have a project where I'll be implementing a device that helps with Bicep Curls, adding resistance to it. So I have an idea with 2 pieces of guards, one on the forearm and one on the biceps, it will be conjoined through a latch in the middle which will rest in...
  17. A

    Is the source in parallel or series with the resistor?

    Thank you for your time and effort. It is much appreciated. 1. Homework Statement I have attached the problem with the solution to this thread. Basically, the problem asks to construct the circuit model for a generic device by using the data of terminal current and voltage measurements. From...
  18. D

    What is the maximum capacitance of the device?

    Homework Statement [/B] The figure [attached] below shows a variable "air gap" capacitor for manual tuning. Alternate plates are connected together; one group of plates is fixed in position, and the other group is capable of rotation. Consider a capacitor of n = 4 plates of alternating...
  19. Kaura

    Designing a Disc Golf Launcher: Feasible & Accurate?

    For my Engineering class I have to work with three other people to design a device that launchers a disc golf. So far we have a basic design plan but we are unsure if it is actually viable. Essentially there will be a platform that holds the disc in place and will be propelled by 2 to 4...
  20. TheComet

    Series diode and a low power device

    I'm designing a device that consumes 450nA in idle (up to 2mA peak) and the maximum allowed voltage is 3.3V. The power is supplied by a battery with a voltage of 3.6V. One of the problems I've run into is: All LDOs I could find have a quiescent current consumption (Iq) greater than 450nA. The...
  21. JeffCyr

    A theoretical flotation device using a vacuum (for a novel)

    I'm writing a serialized Steampunk-fantasy story in which the cities float high in the planet's atmosphere using a combination of Magic and technology (sci-fi-ish steampunk technology) Though I want to bring it as close to real science as I can. From some google searches it seems that a vacuum...
  22. bbbl67

    I Is Negative Mass Possible? Exploring the Latest Research and Controversy

    Was reading this article: https://phys.org/news/2018-01-device-negative-massand-lasers.html#jCp The article claims that these guys have created negative mass? If that's true, isn't that ground breaking? It's one of those extraordinary claims that needs extraordinary proof, doesn't it? Or is...
  23. S

    Device with which I can measure the frequency of light

    Does anybody know where i can buy a device with which i can measure the frequency of light from various sources such as bulb light?
  24. C

    Can someone please tell me the name of this motor-like device

    Can some please tell me the name of this ? this is just the shaft the part above is meant to spin this came out of a lyman case prep xpress for making gun gun cartridges someone bought it to me it is 120v but they pluged it into 240v and of course burnt it out there is no writing on it and i...
  25. EastWindBreaks

    Pressure of a piston cylinder device after heated

    Homework Statement I am confused on when will pressure of two states be the same for a piston cylinder device. Below are two problems where one's final pressure equals the initial pressure and one is not. Homework EquationsThe Attempt at a Solution Initially, I thought a piston-cylinder...
  26. EastWindBreaks

    Heated piston & cylinder device with saturated water and vapor states

    [Mentor note: Thread title changed to describe actual problem being presented] 1. Homework Statement Homework Equations The Attempt at a Solution I understand you have to interpolate temperature and pressure of the saturated vapor from the table, since there is no matched final specific...
  27. S

    Artificial Gravity Technology: Creating an Implosion Effect

    I ran across an earlier thread, no longer open for comment, regarding the science fictional 'implosion grenade' & what might produce a similar effect. One theoretical technology might have a possibility of producing such an effect, at least to some extent. It could be an outgrowth of the...
  28. J

    Assessing the Feasibility of JaycubL's Device Concept: A Preliminary Analysis

    This is a plan for a device that is going to be made a user called "JaycubL" he has no confirmation but I would like to know if the concept is in the right direction. I am not the one making it
  29. J

    Self Contained Egg Moving Device

    Homework Statement I have a project for physics that requires me to construct a self-contained egg moving device. It must move itself 0.5m, then pick up an egg (in an egg cup holder), then move another meter and drop the egg off onto a platform 1.0m high, then continue moving after dropping it...
  30. T

    Device to measure different spectrum of UVs (UVA and UVB)

    Hi all, I'd like to know if there's a reliable tool that can measure UVA and UVB concurrently at regular interval and record it. Or if can't record, then at least can be connected to a computer or network and will send the readings at regular interval. or perhaps anybody can point me to a...
  31. BillTre

    Device That Would Be Useful on Dune

    Researchers from Berkeley and MIT have made a clever solar powered device that can extract water from low humidity desert air. Good for arid places, like Dune!
  32. asherraph

    Silicone sealant for medical device

    i want to ask...is it any type of silicone sealant is suitable for medical application?? i need to find the sealant that are biocompatibility for pvc tubing and dialysate with body temperature. how about acetoxy and elastomer is it suitable??
  33. R

    Can 2 slave devices be connected to one bluetooth device?

    2 slave devices to one system?? (3 TOTAL devices)
  34. D

    Natural frequency of an Oscillating water column device

    Homework Statement Assuming that an OWC device is floating/moored in monochromatic waves. When there isn't air pressure distribution inside (atmospheric condition) the device behaves as an undambed body (with the oscillating chamber open to the atmosphere). When there is air pressure...
  35. J

    Self-contained Egg-moving Device

    Homework Statement I have a project for physics that requires me to construct a self-contained egg moving device, that must use falling masses to power it. It must move itself 1.5m, then pick up an egg (in an egg cup holder) off of a standard sized paint can, then move another meter and drop...
  36. L

    I Determining Coordinate Transformations for Cloaking Device

    I was reading this article: https://arxiv.org/ftp/arxiv/papers/1005/1005.5206.pdf , regarding the mathematical description of a diamond-shaped cloaking device, and am struggling to understand how the authors found the coordinate transformations in equations (1) and (5). What is the process for...
  37. srinaath

    Electrical DIY wireless power transfer device concept

    i am planning to do a small diy wireless power transfer device. The circuit of the transmitter is receiver has just the coil and load arrangement. my query is, (please correct me if am wrong) -->to induce a voltage in the secondary coil, there must be a varying magnetic field right? -->but...
  38. J

    MATLAB Matlab to r-pi to I2C device issue

    I have a 3-Axis Digital Compass IC HMC5883L I2C chip, I just want to use it to learn how to talk to sensors via a Matlab to raspberry-pie to I2C chip link. The set up from Matlab to the pi is straight forward and simple, the issue I'm having seems to be the address I'm being returned when...
  39. G

    I What is the Role of Space in this Apparatus?

    Here is the picture of my apparatus.
  40. M

    Theory/construction of conductance measuring device (films)?

    Hi, So I have this situation, I'm totally inexperienced with anything electricity. But as faith has it sometimes, suddenly I need a device that would be able to measure the electrical conductivity of a thin film. Is there anyone who could guide me what would be the essential parts of a system...
  41. James Kent

    How can a device prevent twisting of USB cables when rotating?

    This is a thought experiment: My PC is mounted on my ceiling. I want to run a USB peripheral through a cylindrical retraction device (like a dog leash). The device is going to mount to the ceiling also and rotate about it's vertical axis. This will allow me to pull down the mouse from the...
  42. M

    What is the uncertainty in 5.00mm measured by analog device?

    Homework Statement What is the uncertainty in 5.00mm measured by an analog device? Homework Equations No equations, Uncertainty and error analysis question The Attempt at a Solution I know that the uncertainty is half the smallest division but i can't figure out what is the uncertainty and...
  43. FallenApple

    Rotational Vectors not merely a bookkeeping device?

    I was told that the direction of the cross product is an arbitary convention to give rotation a "direction" + for one direction and - for the other. That it is simply a book keeping device to make sure different rotation directions are given different signs. It seemed to be the case as I am...
  44. tjvv

    How to detect that my device is underwater?

    Hi, I have a waterproof smartphone with sensors like barometer, gyro, accelerometer, microphone). I want to do an app that 1) detects that the phone is underwater: I though in using some reading from touch panel as water is electro conductive and it may provide me some reading to indicate...
  45. nothing909

    Switching device for switched reluctance motor

    I have to choose four switching devices for a switched reluctance motor. I have chosen a MOSFET, transistor and relay, what other device can be used?
  46. E

    Unknown device / Physics equipment. Please identifiy....

    I'm stumped by this one... Any idea what it is? Inside there is a focusable optical target with 3 green lines. The white "pens" dip in ink and mark something. Any ideas?
  47. J

    Building a computing device for COMSOL and ABAQUS

    Hello to everyone, I've just started my PhD in Mechanical Engineering. And we've to buy a computing machine of high end to use ABAQUS and COMSOL software. Can anybody recommend the machines which can run these both software. P.S: We have to use Windows because there seems to be some graphics...
  48. M

    Understading control mechanics of a surgical device

    Hello everyone, This Moslem fathy, I am a heart surgeon, This is a video of a surgical device, I would like to understand its mechanism in some Aspects http://psdl.engin.umich.edu/pdf/Awtar_JMedDev_FlexDex.pdf this is a pdf that expalins the concept I would like to know how the movment is...
  49. aladinlamp

    A Can a Ring Laser Interferometer Measure Earth's Spin and Determine Latitude?

    Hi is there any device or experiment, which could measure Earth spin vector and magnitude, centrifugal/centripetal forces, so i could derive from it, where is west and east , what's the vector of Earth rotation and what's my lattitude. Im assuming these forces and effects has to be...
  50. baby_1

    Autocorrelation function of the output of the nonlinear device

    Hello for an input signal with a noise we have and for obtain Power spectural density we use autocorrelation function where hkm is but I need to know what is autocorrelation function for different inputs with different frequencies? such as Any help will appericate
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