Device Definition and 531 Threads

How is it possible to measure the second-order correlation function with a device that can only perform start and stop measurements, and for each measurement, it can only record 5 stops? I understand that experimentally it is necessary to measure the coincidences, the independent events in each...

I got this out of an old chemistry lab I cleaned out to use for experiments when I was in college in 1983. I kept it but never knew what it was for. Neat antique box specifically designed for this device. Some optic device with a pivoting mirror. Almost looks like it would be for a laser table...

There is an interesting video on the Wiki page for Hydrogen. A metal enclosure made of two funnels with a smaller hole at the top and a larger hole at the bottom is initially is filled with hydrogen gas. The covered holes are opened and the hydrogen escaping the top hole is lit. After a few...

I'm working on a school project and I have to find and/or make a circuit schematic to a car anti-theft system that will disconnect the car battery shortly after the car alarm goes off. I am new to the electronic engineering field but I can differentiate a few different components on a schematic...

A certain mechanical appliance or device is given a rating that says, a certain operation or a certain movement can be performed some specified thousand times. What does the rating really mean? Was that movement or operation performed until the piece failed? Does it mean some advanced test...

Planning a kitchen renovation. We've found a SIEMENS iQ700 glass downdraft extractor [model LD98WMM60B] that we'd love to use. It, of course, is only available in EUROPE. EAN code : 4242003907122 Connection rating : 300 W Fuse protection : 10 A Voltage : 220-240 V Frequency : 50; 60 Hz Plug...

This article https://www.bbc.com/news/science-environment-62321537 makes it sounds like quite a big deal and if the description is accurate then that seems like a reasonable characterization, however I have little to no knowledge to base any judgment on AND this is a pop-science type of...

Researchers at the Center of Excellence for Quantum Computation and Communication Technology released a study published by Nature describing a quantum device that models the motion of electrons in Polyacetylene. The device is not a general purpose quantum processor, but the methods they used...

I'm putting this here because the ideas just a result of hours in traffic, but I'm curious what people would say about it. It would be a device for drivers to communicate with each other to decide who should go first when it's ambiguous (e.g. merging, changing lanes in front of someone...

A while back a was messing around in the shop, and ended up making this water pump that uses only heat to pump. The two check valves are the only moving parts. Here is a drawing of what it looks like inside. Here is another drawing of what I believe it is doing in its cycle. The system...

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Attached are some Sliding doors images. Can they be operated with a remote control device? The remote control device will have buttons for opening & closing the left and right door. What will be the design & construction changes in the sliding doors so that they can be operated using a remote...

I am mystified. My number-combo door lock (one of two I have) is powered by 4 AA batteries. It has been working for so long I don't remember when I installed it - musta been ten years at least. The batteries have begun to run down - it labours to retract the dead bolt now - so it's time to...

Hello everyone !I am working on noise reduction and I wanted to do some experiments with an arduino. I took an arduino which get music (as an example) in input by jack. It also has a microphone and in a first try the goal is to get as an output the music - the noise around... To act like a kind...

Good day all:smile:! I've been researching on 'Atmospheric water harvester' (AWH) devices. As I researched many functioning mechanisms on such devices, the most workable mechanism to me seems to be the one illustrated in the picture attached to this thread. (i.e running hot...

In a plasma device, the plasma is generated by applying high voltage in a gas. What are the specifications for the power supply producing such plasma? The output must be AC or DC? Pulsed or not? What are the current, voltage, etc...?

Firstly hello everyone and sorry for my broke english, Maybe you can remember there was some kind of sound device in the fringe. Peter Bishop designed and we've seen the observes use it too. This device was able to reconstruct a sound of past using traces left by sound's interaction with the...

Hey all, I have a 5v IC that is triggered by a sensor to unlock the 12v lock, I am using a NPN transistor as a switch with the 5v VCC as the gate, I need it to sink back to the GND of the IC without blowing it, is this safe? If not what changes would you suggest, it has been years since I've had...

Is it possible to design & construct a Microscope (optical or Electron) which can take multiple slides samples instead of a single sample slide at a time?. Possible construction of the Sample Slides target is a circular disc holding say 5-10 sample slides. The Circular disc can be rotated...

Summary:: Hello I am a writer and presently working on treatment for a science-fiction story. So I am not a scientist, just a neophyte interested in science and wanting to write a fiction that would not be too far-fetched and that would make some sense for everyone, including the scientific...

I remember having a device in a previous job that you could plug into your TCP/IP network, and would allow you to communicate with several connected serial ports as if they were TCP/IP ports with their own addresses. (I know you could do this with a computer, but there was also a purpose-made...

We are working on new software for one of our measurement systems (written in Python). The new system is capable of measuring more devices simultaneously than before so keeping track of what we are doing is important; it will also be more automated. One of the things we want to implement is...

When I was looking at the list of related threads to my thread "How does metering device in an A/C cause flash gas", I noticed an interesting thread titled "How does low charge on an A/C cause the subcooling to be low". PeterDonis and fourthindiana had an interesting conversation on that...

When refrigerant enters the metering device of an air-conditioner, the refrigerant enters the metering device as 100% liquid. When the refrigerant in a straight air-conditioner goes through the metering device, the metering device lowers the pressure of the refrigerant a great deal. The...

Just need to see what the name of this device is. Model number would also be helpful.

How did you find PF?: Google search I would like to discuss a simple mechanical system for a project of mine. Here it is if anyone can solve it: Allow me to explain what is required. The circle needs to spin via a downward force represented by the black arrow. The red arrow is the direction...

I've got an electric toothbrush which is rechargeable, it had been regularly used and charged for years until one day it didn't charge. I immediately thought that the toothbrush was failing but at the end of the day I found that it was the charging stand failing, the toothbrush was fine. But I...

Problem: Tablet is not detectable by computers. Yet... it is noted as "Unknown USB Device (Device Descriptor Request Failed)" in the device manager under Universal Serial Bus controllers. I have already done the basic 30 articles reading and tried the standard suggestions including: Try a...

I almost always buy food from local market but recently I want to buy some rice (and probably other foods later) overseas which will be imported through our customs, so most likely the food will be scanned through x-ray or other high energy devices that I don't know, could rice grains or other...

This device, if it or something similar exists at all, needs to be completely mechanical without ANY electricity and be really precise and strong (to last a long time). Press a button in order to trigger the start of the delay time. It must start only when the button is fully pressed down (or...

I have a question in regards to a neuromuscular device. Can silicone be combined with hydrogel or the rubber silicone encased in hydrogel to form a wrist watch strap combined with a NMES device. If this is possible how would the hydrogel conduct the NMES device and what is the durability of...

The idea itself is to create in a toroidal chamber a spiral-shaped plasma filament with a singularity in the form of a ring of rotating plasma, in which the concentration of ions and the duration of nuclear interaction increase during electrostatic compression. For this, it is proposed to wind a...

Hi. This is an idea which I just happened to think of, and I was curious if it would be at all feasible. Here's a quick sketch I drew: The two curved mirrors should have a laser attached on one end and a video camera attached on the other. The laser would be tilted very slightly above...

Hi there! I bought a photovoltaic cell. I would like to learn its band gap at 300 K and 0 K. How can i measure band gap or calculate? I have already measured Temperature to Vmax values. I couldn't find any good information about this topic. Thanks.

Hi, I'm aware it is an odd question. Consider a ##k##-terminal electrical device as black-box. We know from KLC and KLV that just ##k-1## currents and ##k-1## voltages are actually independent (descriptive currents and voltages). Furthermore we generally expect there exist ##k-1## relations...

What is the scale of magnitude of gravity, that a modern Cavendish like laser detector of gravity pull between small daily size objects can detect in comparison to the magnitude of gravitational wave a LIGO like detector can detect? Will such a modern Cavendish like device measurements be...

Once again I'm looking at a project that is challenging my engineering limits! I have a type of metering device that has an electromagnetic coil that actuates it, it's designed to be relatively linear motion depending on amperage applied through it, and it has a variable resistor as a sensor for...

I am trying to build a device that will push up a small piece of wood (attached to a weight) from its’ base to support 10 pounds. I would only need to move 1 to 2 inches. My device would be about 1 - 2 feet wide. I would use perhaps this motor: Kohree 12V DC Gear Motor 30RPM Small High Torque...

I thought of using hydraulic Ram n actuators but was informed no power available on some site. I am thinking if we can use pulley mechanism from back that connects to top of overhead. I hv modified the container n attached screenshot of how it has to be. Please help if you know of a way to lift...

Hey everyone, I'm currently working on a 1D Poisson Solver for a MOS device (Al-Si-SiO2). Therefore, I programmed a Poisson Solver which is appling a boxintegration (Finite Volume Method) through the structure from φ(0) at the metal-oxide interface and φ(x_bulk = 20 nm) in in the silicon bulk...

Hello, I am sorry to raise this old subject concerning the device of R. Mallett, in particular, one is right to quote has violation of the condition on the weak energy which is not respected. Okay, let's give up this violation of the weak energy condition for now. In my opinion, the big...

Does a rubber mat on a device prevent static build up and discharge on a metal device well using it

What exactly is a measurement device and how does it carry out a measurement? For instance, in the double slit experiment, you always hear about particle/wave duality. When it's not being measured it behaves like a wave but when a measuring device is placed by the slits, it behaves like a...

Hello, I'm trying to make an electromagnetic shaker but I'm not sure if this is possible? Basically I want to wrap an iron core with a solenoid and use AC to shake a magnet at some distance away. I'm not certain on the approach at the moment but I'm kind of looking at the feasibility at the moment.

I am trying to come up with a design for a device that can generate very high and very brief waves of pressure directed at a 1 mm diameter target (shown as "E" in "Diagram.PNG") housed in a steel support structure "D". The idea is to accelerate hammer "A" towards anvil "B" in a vacuum tube. The...

I am in pharmacy school and my professor recently went over lung diseases with us. An important (and cheap) tool that many patients can use to detect whether their lung function is declining is a peak flow meter, which tells the patient how much air they are moving when they exhale with as much...

I am trying to solve the following problem. Let us take a bounded domain $S$ in which an explosive device is located. A team is deployed to locate and disable the device before a certain time T (when the device explodes). There are several criteria to be satisfied: 1. The domain $S$ is...

Hello, I'm working on a scintillation device to detect protons, I have a disagreement with one professor and I would like your opinion. There is one photodiode model we want to use to measure the light intensity from the scintillators, and we want to relate the signal of that photodiode with...

How do I build a device that creates An electrical discharge between wires? I can build an oscillator. Do I Connect an oscillator to a transformer and connect the transformer to a pair of wires?

Want a nuclear fusion reactor for your home or office? No problemo... https://physicsworld.com/a/physicists-spot-the-signatures-of-nuclear-fusion-in-a-table-top-device/