Today we have the first version of the hybrid metal detector with great depth
What does the device consist of:
This metal detector consists of two parts:
The first part: It consists of the transmitter, which is the transmitter used in previous metal detectors, especially the sufficient detector, which in turn consists of two oscillators for transmission, where the first oscillator with the first coil sends a radio frequency of the same value as the frequency that the second oscillator sends with the second coil, and they unite in the third oscillator, which is called the mixer To send the unified signal to the amplifier, and here we control the frequency through a variable capacitor or several variable capacitors on both the first and second coils.
The second part of the device: It is the receiver, which is the receiver of the Russian pirate circuit, where the amplifier, which itself is the receiver of the frequency, receives from the synthesizer transistor, and amplifies the frequency via the AISI lm358, so the sound comes out clearly in the device’s speaker.
Device work:
When the coil passes over a metal, a difference occurs in frequency as a result of this passage. Thus, the frequency of the first coil located close to the ground differs from the second coil located in a box in the device, or the two coils are close to the ground. By passing over the metal, a difference in frequency occurs between the coil passing over the metal and the other coil, and as a result This difference creates sound and is the sum of the frequency difference between the two coils.
Files: With experience, it was found that the following files achieve the best range for the device
The first coil: 15 cm in diameter, with 11 coils, knowing that the wire used is 0.5 mm, but other coils can be tried and they will work, God willing, but the range will be different, and here we are talking about personal experience for the best depth of coils.
The second coil: a circular coil with a diameter of 30 cm and the number of its coils here is 7 coils
The third coil: a semi-rectangular coil, its width is 30 cm and its length is 60 cm, and its number of coils is 5 coils, and the tested wire is 0.5 mm.
The fourth file: a square file with a diameter of 60 cm. We can try several types of wires to get the best result.
device depth:
The depth is according to the file used. It is known that the greater the file size, the greater the depth and depth of the files as follows:
The coil is 15 cm deep and approximately 15 cm deep for the coin
The file is 30 cm in diameter, circular, approximately 25 cm deep on coins, and for large metal, approximately 75 cm, depending on the workmanship of the circle and the file.
The file is 30 * 60, its approximate depth is one and a quarter meters
The coil is 60 squares, its approximate depth is one and a half meters, within the condition of perfecting the circuit and the coil
Clarification and explanation video:
ic alternatives
lm 358 هي tl072 .... tl082 ..... ne5532 ..... lf412
When the coil passes over metal, a difference in frequency occurs as a result of this passage, and therefore the frequency of the first coil located near the ground differs from the second coil located in a box in the device, or the two coils are close to the ground and by passing over the metal, a difference in frequency occurs between the coil passing over the metal and the other coil as a result
Comments