How to detect ghosts with metal hangers?
I have found water this way my self, never looked for anything else. when you do it you will know it is real that the rods are moving in your hands without effort on your part. Don't waist time trying to convince others, just teach them how to do it instead. Take thick gage wire or a metal coat hanger and bend it into an "L" shape (not in half). Now make another the same length so you have a pair. Grasp them loosely one in each hand by the shorter side. Have the longer side going up and over your hands. Concentrate on what you are seeking and follow the way the rods point. When you reach what you are looking for the rods will either cross in front of you, or swing apart pointing behind you.
How far down can a metal detector detect metal?
The short answer is from 6-10" depending on the soil for most good detectors and coin-sized objects. Larger objects can be detected as much as 14-16" in ideal conditions. Things that can impact depth include:Size of object being detected.Metal composition of object being detected.Proximity of target to other targets (especially iron.)Amount of discrimination you setFrequency of operation for your detectorSensitivity setting you setSize of coil you're using (larger = deeper) Composition of soil and moisture levels in soilLength of grass/scrub on top of the groundSpeed of swing / Smoothness of swing
How can I make a metal detector with only 2 copper coils, a power supply, an led and a buzzer?
Thanks for A2A.You can make a metal detector with your list of items. But, if you want to make something reliable of practical use, then you need to have calibrated set up. Questions you need to answer will be what range would you like to detect.If it helps, Texas instruments have a inductive sensor prototype with onboard micro controller, just check out if it helps, it costs about Rs. 3000/- . You may get it for less on eBay.
What type of metals can metal detectors detect?
Yes, they will detect all conductive metals, including pretty much any grade of steel. A metal detector basically uses an electric current driven through a coil to generate a magnetic field. Whenever a conductive material is brought close enough to the detector, it disturbs the shape of the field (because induced current is transported along the surface of the metallic object). The detector is able to sense this change of shape of the field (i.e. "change in flux"), and give off a signal. However, the ability to detect metals depends on: 1) The amount of metal present, 2) How close it is to the detector, and 3) How conductive the metal is. Gold, silver and copper are very conductive. Aluminum less... iron, zinc and lead less so. Also, heavily corroded or coated metal objects will have less of an "electromagnetic signature" than clean, fresh samples. If you properly set up the detector in advance, it should be able to detect any reasonably-sized conductive (i.e. metal) object down to a few feet, under normal soil. But having had some fun with detectors in the past, I'll tell you that you'll "kiss a lot of bottle caps, screws and nails" before you meet your first "silver mercury dime or walking liberty half-dollar". Your best bet is to search where lots of people used to hang out, especially if they spent money there. Old abandoned fair grounds, etc., are a nifty place to look. By contrast, farmers' fields will have steel nuts, bolts and washers strewn from farm equipment, but seldom anything of notable value.
Will aluminum block a metal detector?
You've obviously never seen "This is Spinal Tap."
Can a metal detector detect cell phone wrapped in carbon paper?
Well metal detectors work on the principle on electromagnetic induction so i guess the magnetic field generated by the mobile will penetrate the carbon paper and reach the detectors to turn on the alarm.so i guess metal detector will detect cell phone wrapped in carbon paper (Not entirely sure though)But it will surely get detected by an X-ray scanner.
How detectable is stainless steel in a metal detector and why?
Stainless steel is a metal and by definition is also a conductor of electricity and is detectable with a simple metal detector.One common characteristics of metals is the ability to conduct electricity. Conduction of electricity is a property that is required for detection by metal detectors.Most common metals have a molecular structure that is crystalline where the electrons of those atoms in the crystalline structure are shared in a cloud about the crystal and those electrons have the freedom to move somewhat more than those in a molecuar compound. The movement of electrons allows electricity to flow through the metal.One type of simple metal detector works by moving a magnet over a metallic material. The moving magnetic field induces an electric current in the metal nearby, (quite similar to the electricity generated in a power generator)This induced current produces another magnetic field near the metallic conductor ( quite similar to magnetic field produced in an electric motor by the field coil(s))This magnetic field is then detected in the metal detector by a secondary detection coil ( again by inducing an electric current) that results in activating a detection circuit alarm to activate a beeper of an analogue indicator.Ref: Single chip metal detector circuitThe electrical conductivity of stainless steel is lower than some other common metals; that induced magnetic field will be weaker and make the SS a bit more difficult to detect. The sensitivity of the detector will need to be adjusted to detect in this case of stainless steel.
How can I make a metal detector circuit for a long range?
One that you can make or buy for less than $100 will have very short range. It probably won’t distinguish between different metals. I have a friend who does a lot of detecting. His detector will detect a coin at more than 12 inches depth, as well as indicated the type of metal. He regularly finds gold and silver rings as well as coins. His detector cost around $3000. You get what you pay for.
How can I make a metal detector circuit without using inductance?
Capacitive sensor is from instrumentation, senses both metal and non-metal.But it is a close proximity sensor.
Why didn't they just send the strawberries through a metal detector, or make jam?
Why didn’t they send the strawberries through metal detector ?the needle is too tiny and it’s not enough to trigger the “high sensitive” hand held metal detector.Industrial level detectors are expensive (around USD $3,000 for a single process line). And unless you’ve already invested millions for hundreds of industrial detectors, you won’t be able to process tons of strawberries before they got rotten. And even if you did, you still can’t recover the faith of consumers in short time. It’s not something rational.The profit per unit of strawberries isn’t extraordinary high. If you queue in line to get them detected, the extra man power, transportation and maintanence fee of the machine will eat up all the profits.Therefore, you’d loose less if you just dump them.Why didn’t they make strawberries jams ?The market don’t need that many amount of jams.The factory can’t handle all the strawberries. It’s not free even if you just put something in the inventory.Even the jam factory willing to make all strawberry into jams, the jam market will just collapse and the price will drop to even lower then mineral water. And buy in price of strawberries per unit will drop to a level that is lower then it’s cost, thus you loose even more.Therefore, it’s better for all of us if you just dump them.Welcome to the world of Capitalism.