GOLDEN MASK 4 pro

GOLDEN MASK 4 pro

Welcome, dear readers , here we always try to collect more metal detectors that can be assembled at home, and publish useful information for metal detectors and exchange useful things. I found a new and good review to make a new modification of the metal detector called the Golden Mask Pro 4. We will publish here how this amazing device is assembled and how it is used.
جهاز الكشف عن المعادن GOLDEN MASK 4 proGolden Mask 4Pro is a very fast and powerful metal detector. The search coil works at a frequency of 18 kHz and thanks to this frequency, the device is very sensitive to small objects and low-conductivity metals such as small coins, jewelry, and gold nuggets. The detector has an ultra-fast recovery speed, which makes it the perfect choice for searching waste areas, especially if it is equipped with a small search coil. Thanks to manual ground balance, this detector penetrates deep into the ground, indicating the smallest metal objects under the coil search field.
Technical characteristics of the GOLDEN MASK 4 pro
The device is characterized by the following technical characteristics:
  •     Original brand: The Golden Mask
  •      Model: 4Pro
  •      Technology: VLF
  •      Frequency: 18 kHz
  •      Ground balance: manual and automatic
  •      Search Mode: Motion, Two Tones, One Tone with discrimination function
  •      Button Knobs: Sensitivity, Frequency, Discrimination, Threshold, Ground Balance
  •      Search coil:   DD coil
  •      Battery: 10x1000mAh AA NiMH or NiCd  batteries
  •      Battery life: 25 hours

GOLDEN MASK 4 pro circuit diagram
Manufacturing the device involves many complications that make  the device home impossible, but the most difficult step is the SMD components placement.

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Components list:

To assemble the device it is necessary to purchase the necessary parts. If the recommended details and features are observed, everything will immediately begin to work.
SMD resistors and capacitors of 0805 size are used in this project.
It is recommended to use resistors, with 1% accuracy. Before installing the pieces on the PCB, check for compatibility with the recommanded value.

List of resistors, accuracy class 1%:          

  • 10R     – 8 PCS. – 10R0
  • 68R     – 2 PCS. – 68R0
  • 1к0      – 4 PCS. – 1001
  • 2к2      – 4 PCS. – 2201
  • 2к7      – 1 PCS. – 2701
  • 3к3      – 1 PCS. – 3301
  • 4к7      – 1 PCS. – 4701
  • 5к1      – 6 PCS. – 5101
  • 5к6      – 1 PCS. – 5601
  • 6к8      – 5 PCS. – 6801
  • 10к      – 13 PCS.-1002
  • 12к      – 2 PCS. – 1202
  • 15к      – 1 PCS. – 1502
  • 16к      – 2 PCS. – 1602
  • 18к      – 2 PCS. – 1802
  • 22к      – 7 PCS. – 2202
  • 27к      – 2 PCS. – 2702
  • 39к      – 5 PCS. – 3902
  • 47к      – 4 PCS. – 4702
  • 68к      – 4 PCS. – 6802
  • 82к      – 2 PCS. – 8202
  • 100к    – 4 PCS. – 1003
  • 150к    – 1 PCS. – 1503
  • 220к    – 4 PCS. – 2203
  • 300к    – 2 PCS. – 3003
  • 390к    – 2 PCS. – 3903
  • 470к    – 4 PCS. – 4703
  • 750к    – 3 PCS. – 7503
  • 1м       – 1 PCS. – 1004
  • 1м5     – 2 PCS. – 1504

We also take 1 SMD resistors and capacitors, size 1206 of the 0R rating – it can be used if you make 2 or 3 chastotnik, it should be installed next to the GB toggle switch, slightly to the left of the lower and middle.

Variable resistors: we take with a rod 20mm. And more
5к - 1 PCS.- В5К  (Ground Balance) 
10к  - 1 PCS. – В10К   (Power Level) 
10к  - 1 PCS. – В10К   (Sound ON/OFF) 
50к - 2 PCS. – В50К –  (DISCRIM LEVEL  and AUDIO FREQ) 

Resistor trim 3296W-1-203 – 20K – 2 pieces (you can put 4) On 2 of them the nominal values of constant R are indicated – you just need to put them. SMD capacitors 5-10%, the higher the voltage, the better

22p  - 1 PCS. (NPO) 
220p - 1 PCS. (NPO) 
100n - 12 PCS. (X7R) can be put 1uF (X7R)

Electrolytic capacitors: choose better          
330uF*25V – 7 pcs. you can put and 220uF*25V

Film capacitors: 5-10%, the higher the voltage, the better, it is recommended WIMA, Epcos
1000p - 4 PCS. – 102
4700p - 1 PCS. – 472
0,01 - 3 PCS. – 103
0,015 - 5 PCS. – 153
0,022 - 1 PCS. – 103
0,047 - 2 PCS. – 473
0,1 - 11 PCS. – 104
0,47 - 2 PCS. – 474
1,0 - 2 PCS. – 105
Condenser tantalum - 106-107 (16V or more)
Film Capacitors: 5-10%, 250V (min 100V), recommended WIMA, Epcos
M1K250 - 1PCS. - 104  - 18 kHz
220n  250V - 1PCS. - 224 - 12 kHz
470n  250V - 1PCS. - 474 - 8 kHz
L1 - 100mH - 1 pc. - 101K - instead of it you can put a resistor - 0R
HEF4053BT (SO16)  - 2 PCS.
TL074C (SO14)         - 2 PCS.
LM358 (SO8)             - 2 PCS.
LM393 (SO8)             - 3 PCS.
PBSS4041SPN (SO8)- 1 PCS.
MC1458 (SO8)           - 1 PCS.
L78L05 (SOT89)        - 1PCS.
BCX53-16 (SOT89)   - 1PCS.  - AL
BCX56-16 (SOT89)   - 1PCS.  - BL
BC857C (SOT23)   -  3PCS.  – 3GW
BC847C (SOT23)   -   2PCS.  – 1GW
BC817-40 (SOT23)   - 1PCS.  – 6CW
Schottky Diode SS14 - 1 PCS.
Diode LL4148            - 5 PCS.
diode of Zene-BZV55-C5V1-5V1 - 1 PCS.
diode of Zener- BZV55-C3V6-3V6 (3,1…3,6V) - 1 PCS.
Optocoupler – PC817 (JC817) - 1 PCS.
Speaker – 8 or 50R Om - 1 PCS.
Socket for sensor 5 pin - 1 pc.

Printed circuit board PCB

The board can be ordered from the following website:

The device is running on  DD type search coil  (see how to make a DD coil)

3 comments

  1. Hi dear engineer, good time, i cant download the golden mask4 file, back and forth image, pcb file, please email me.
    Thanks

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  3. Dear engineer I can’t see the pictures and files of golden mask4pro.please send it to my mail.thanks a lot.

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