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Pinpointer KB_V3_VCO

Pinpointer KB_V3_VCO

This Pinpointer KB_V3_VCO is a simple precision target location device that can be manufactured at home. It has one integrated circuit which is available in all stores and has many alternatives that can be found easily. It has a range of detection about 5 cm for a coin which is very suitable for searching on dust and sand. The device has dynamic search mode, and when you approach the target the mode becomes static.

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Schematic  Pinpointer KB_V3_VCO

Below is a pinpointer schematic for home manufacturing as well as a printed circuit board PCB which can be downloaded at the end of this post.

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microcontroller pi detectors pi metal detector schematic felezjoo pi оригинальный шестнадцатеричный файл hammerhead pi simple metal detector pi metal skema metal detector layout felezjoo пи проект pirate metal detector pirate metal detector şema

microcontroller pi detectors pi metal detector schematic felezjoo pi оригинальный шестнадцатеричный файл hammerhead pi simple metal detector pi metal skema metal detector layout felezjoo пи проект pirate metal detector pirate metal detector şema

The following board helps to put the pieces correctly:

microcontroller pi detectors pi metal detector schematic felezjoo pi оригинальный шестнадцатеричный файл hammerhead pi simple metal detector pi metal skema metal detector layout felezjoo пи проект pirate metal detector pirate metal detector şemaThe PCB can be home-made which is very simple can follow the method in the following post:

microcontroller pi detectors pi metal detector schematic felezjoo pi оригинальный шестнадцатеричный файл hammerhead pi simple metal detector pi metal skema metal detector layout felezjoo пи проект pirate metal detector pirate metal detector şemaThe following table can be used to assemble the necessary parts of the device.

ID Name
kind Full name
Quantity
Regulator LM78L05 1
U1 O Amp LM324 1
T1 Transistor KT3102 2
T2 Trans KP303A 1
C1 ، C5 Capacitor 0.1 uF 2
C2 Capacitor 0.033 uF
1
C3 Capacitor 0.068 uF
1
C6 Capacitor 1000 pF 1
C7 Capacitor 0.2 uF
1
C9 ، C10 Chemical capacitor 10 uF
2
C11 Chemical capacitor 100 uF
1
C12 Capacitor 0.01 uF
1
R1 Variable resistor 4.7 KOhm
1
R1 resistor 2.2 KOhm
1
R2 ، R8 resistor 4.3 KOhm
2
R3 ، R3 resistor 680 Ohm 2
R4 ، R13 ، R14 resistor 1 ميجا أوم 3
R5 ، R6 ، R11 resistor 10 KOhm
3
R7 ، R16 ، R17 resistor 100 KOhm
3
R9 resistor 1 KOhm 1
R10 ، R12 resistor 22 KOhm
2
R15 Variable resistor 47 KOhm
1
L Search coil 1
Speaker 1

The value of the R3 is selected according to the maximum sensitivity for the search coil made from 5 cm ferrite rod, 8 mm of diameter and 320 turns using a 0.3 mm insulated copper wire.
An additional coil can be made on a 40 turns  with an insulated copper wire of diameter  0.14 mm  and 150 turns and the resulting frequency is about 20 kHz.
The device Consumes about 5.5 mA and with the sound and light signal is around 10.5 mA.
After installing the device it will look exactly like the one in the following picture:

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Using this detector, different types of coils and different sizes have been tested (when changing the coil, the variable resistance R1 must be tuned), the coil (200 mm diameter, 80 turns with wire diameter 0.5mm), the pinponter detect a  PCB board at a distance of 300 mm. Generally the device works with any coil and the frequency can be adjusted from 15kHz to 20kHz.

microcontroller pi detectors pi metal detector schematic felezjoo pi оригинальный шестнадцатеричный файл hammerhead pi simple metal detector pi metal skema metal detector layout felezjoo пи проект pirate metal detector pirate metal detector şemaIn order to search for small targets, the coil can be made smaller as appropriate for the hand:

microcontroller pi detectors pi metal detector schematic felezjoo pi оригинальный шестнадцатеричный файл hammerhead pi simple metal detector pi metal skema metal detector layout felezjoo пи проект pirate metal detector pirate metal detector şemaThe device can be placed in any plastic box suitable for carrying manually:

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