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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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METAL DETECTOR sa NAIL FINDER sa STUD FINDER x TREASURE FINDER xx ELECTRONICS xx METAL & METALWORKING Tips on hunting for buried treasure with a metal detector. Metal detector uses a unique detection coil that is wound directly on top of a printed circuit board. A portable AM radio is used to amplify the tone shifts caused by buried metal. Est. cost: $6 (kit). Electronic pipe and cable finder. Battery-powered metal detector. A beginner's project. Super-sensitive metal locator. Est. cost: $5. Circuit for a simple metal detector illustrates the principle. Used with a transistor radio to find metal. Houndog. Build your own electronic metal detector. Can detect a penny buried 3" to 5". Will operate for up to a year on a 9-volt battery. Estimated cost: $25. Tip: Locate studs (drywall screws) by using fine steel wool. This works if the screws were lightly magnetized by the magnetic tip of the drywall screwdriver during installation. Dowsing for underground pipes or conduits made of ferrous metals. Electronic stud finder detects the presence or proximity of magnetic (ferrous) metals. Metal detecting for fun and profit. How modern metal detectors work. Tips on purchasing. Tips on treasure hunting. Part 1. Metal detecting for fun and profit. Part 2. Includes a buying guide. Experimenting with Hall-effect devices, the principal solid-state sensors of magnetic fields. Tips on locating buried artifacts using a metal detector. Tips on selecting and using a metal detector. IC-67 metal locator. High performance unit using integrated circuits deeply penetrates the earth to locate large metal objects. Battery-powered. Est. cost: $40. Beachcomber. A simple, single-loop beat-frequency metal locator will detect objects at a depth of only about 2-ft. maximum (depending on size), powered with built-in speaker. Est. cost $15. Buried-metal locator uses the more efficient inductance bridge method of detection. Audio frequency coupling is used rather than radio frequency. Metal locator will determine the exact location of ferrous or non-ferrous metals at a distance up to 2". Useful for locating hidden nails in walls, boats, etc. Est. cost: $10. Underground survey meter and metal locator can locate such things as a water table 100 feet below the surface. Device uses the resistivity method. Treasure detectors for land use. What's available and what to look for in selecting a metal detector. A discussion of commercially available underwater treasure detectors and the unique problems of underwater work. Low-cost metal locator detects objects at depths of 6". Heterdyne unit uses a portable AM broadcast band receiver to pick up signal. Build a metal locator able to detect a nickel buried at a depth of 3". Estimated cost: $20. "Coinshooter" metal detector reacts to coins and other precious metal objects while ignoring iron and steel. Will detect coins buried from 1" to 3" deep. Est. cost: $35. Experimenter's metal detector. Use this student's model to learn how metal detectors work. Closed-loop tracer is designed to follow a closed-loop wire or cable system. Can also be used to trace the path of a copper or metal pipe. Simple metal detector (treasure finder) toy uses a portable AM radio as a receiver. Metal detector circuit uses only standard components and a simple hand-wound coil. Simple two-transistor metal detector circuit. Metal detector can locate coin-sized objects from a few inches, or larger objects at a distance of over two feet. The detector incorporates a VLF (very-low-frequency) transmitter and receiver. Metal-detector circuit. Circuit to detect large metal objects (such as a car) can be used to activite driveway lights, etc. Treasure hunting for fun and possible riches. Tips on using a metal detector, what is available and where to do your hunting. Diagram shows how an older 23-ft. Chris-Craft was outfitted for underwater treasure locating and salvage. Installation of an underwater window, a winch to lower a metal detector and a simple hoist for raising small sunken objects. Metal detector uses a silicon-controlled rectifier (SCR). Locates objects as small as a tin can at depths up to 5 feet in average soil. Est. cost: $30. Tricks the treasure hunters use. How to get the most from a metal detector. Treasure hunter's guide to metal detectors. All about metal detectors. What is available in commercial models and what are their capabilities. Metal-sensing IC's are viewed. Includes a circuit for a pocket-size stud detector for locating studs and joists in building walls and ceilings by means of the nails or screws ordinarily found in studs. Metal detector consists of a detection loop, an oscillator/amplifier, and earphones mounted on an aluminum and wood frame. Metal detector (treasure finder) is a super-sensitive solid-state instrument. Build this electronic metal detector. Can locate objects as small as a penny buried as deep as 3" to 5". Powered by a 9-volt battery. | |||||||||
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