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Gold Leaf Electroscope : It is a simple device to detect the presence of charge on any body. Construction : It consists of a metal rod which is fitted in an insulating box. Metal rod has a metal knob at its top. Two gold leaves are also attached at the bottom end of the rod. Working : Since electroscope is used to detect the presence of charge.
How the Lie Detector Circuit Works. The schematic circuit diagram of the Lie Detector is shown in the below figure. This entire system consists of three transistors TR1, TR2 and TR3, two LED lights L1 L2, a capacitor C, five resistors R1, R2, R3, R4 R5 and finally a variable resistor VR1. A small NPN transistor and other transistors like BC547, BC548 or BC549.
· 161 kHz Metal Detector Schematic only __ Designed by va3iul. 200 kHz Metal Detector Schematic only __ Designed by va3iul. 220v Live Wire Scanner This simple circuit lets you scan a 220V live wire. The clock input of the IC is connected to a wire, which acts as the sensor.
These can never be eliminated, but careful construction aims to keep them down to a few tens of pF. The signal from the antenna (perhaps a few tens of microvolts, or hundreds for a nearby transmitting station) is introduced to the LC circuit either through a small capacitance, or, as in this case, by means of a second coil L2 wound on top of L1, with its other end connected to earth.
gold and silver jewelry, coins, artifacts, weapons, ordnance, anchors, pipelines, cannons and cannon balls. These high performance Pulse Induction metal detectors detect both ferrous and nonferrous metal objects, while ignoring minerals in the environment. The .
· In simple ores, the amenability of the composite to the recovery influenced by the gold minerals distribution, gold particle size, degree of oxidation and occurrence. Sometimes, gold deposits are not exploited due to the mineral was not well understood and the process was not able to give high recoveries, or at least, expected recoveries.
DIY – Simple Proximity Detector. This is a simple proximity detector using IC CS209. The CS209A is a bipolar monolithic integrated circuit for use in metal detection/proximity sensing appliions. The CS209A contains an oscillator set up by an external parallel resonant tank and a feedback resistor connected between pin 2 3.
Metal detectors will detect ferrous (iron, steel, stainless steel) as well as nonfe rrous (coppe r, tin, gold, lead, silver, aluminium) as well as alloys (bra ss, cupronickel, pewter etc ...
· This metal detector is capable of detecting small metal objects at great distances. For example, a small metal coin or gold ring can be found at a distance of up to 25 cm. And the best part is that it is very simple and can be made by anyone who has basic knowledge in the field of electronics.
Slope detector 2: It consists of a detector diode D 2, that is identical to D 1. It also has filter capacitor C 2, load resistor R 2, and variable capacitor C T2. The tuning capacitor C T2 tunes the lower winding of the secondary winding of the input transformer T. The two slope detectors are balanced because C 1 = C 2, R 1 = R 2, and D 1 is ...
· Static Electricity Detector (Easy to make)... 12/13/2011. 81 Comments. For many people winter is approaching and the temperature is going down. But, it also is a time when the air will hold less moisture, and dry air breeds static electricity. Or, more accurately, dry air does not allow static electricity to dissipate as easily as moist air.
In this project, we will demonstrate how to build a simple metal detector circuit. The device we then build will function as a metal detector that can scout out metal objects, such as coins, nails, keys such as car keys you may not be able to find, and even gold if you're looking for in a beach (though this one may not have industrial strength).
Electroscopes are simple science instruments for measuring high voltage. Electroscopes have been in use for hundreds of years. This FET chargedetector circuit is based on a much earlier circuit called "electronic electrometer" made with a vacuum tube. As a kid I found the schematic in an old paperback book on ham radio projects from Pop.
Simple TwoTransistor Radio. Here is a simple radio that was designed to minimize unusual parts; there isn't even a detector diode! The sensitivity isn't as high as the onetransistor reflex but the simplicity is attractive. Strong stations will provide plenty of volume into a crystal earphone or an external amplifier.
· Schematic Diagram . Illustration . Creating a Simple Circuit. This is the simplest complete circuit in this collection of experiments: a battery and an incandescent lamp. Connect the lamp to the battery as shown in the illustration, and the lamp should light, ...
Most pulse induction metal detectors will therefore just skip this second stage and wait for the third stage to begin the detection and discrimination cycle. Our DSP based detector is different, in that it will detect the exact moment when the discharge curve goes from stage 2 to stage three.
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