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Metal detector is a high performance metal detector designed for security, working Voltage: DC3-5V, Detecting Distance: <60mm.
Simple circuits are easy to assemble and train your skills during assembly. for beginners is really an interesting practice(Board Size:about 8.6*6cm).
It can apply to game entertainment, security check, search for metal product, car detection, traffic statistics, elevator floor control, production equipment position detection, production equipment development and design, electronic product design, play equipment development, metal proximity switch, metal detection in human body.
AA Battery Type: 3 aa battery holder with switch, 3x 1.5V aa battery holder with cover; Voltage Output of One 3 AA Battery Holder: 4.5V, 3x 1.5v aa battery= 4.5 volt aa battery holder.
Wire : 3aa battery holder with wire , wire end; Wire Length: 5.7"/14.5cm; Cable Diameter(count in the PVC isolation around the wire): 0.0393"/1mm; Cable Color: red and black.

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Metal Detector DIY Kit
Operating Voltage: DC 3-5V
Operating Current: 40mA
Standby Current: 5mA
Detection Distance: 60mm
Alarm mode: Sound/Light
Difficulty: Easy
PCB Size : 86*61mm

Installation Steps:
Step 1:Install Metal Film Resistor R1=200K;R2=2K;R3=470ohm.
Step 2: Install Capacitor:C1,C4=104pF;C2,C3=222pF;C5=100uF.
Step 3:Install 2pcs S9012 on Q2,Q3;1pcs S9018 on Q1;1pcs potentiometer on VR1.
Step 4:Install the LED with the long leg as the positive pole, corresponding to the square pad mounted on the board.
Step 5:Install Buzzer and Power socket.

AA Battery Holder
AA Battery Holder Switch Function: ON/OFF switch on 3 aa battery holder
AA Battery Holder Wire : 3 aa battery holder with tinned wire end
Wire Length of 3 AA Battery Holder : 5.7""/14.5cm
Cable Diameter(count in the PVC isolation around the wire): 0.0393""/1mm
Battery Holder Cable Color: red and black

Package include:
2 X Metal fetector DIY kit

2 X 3 AA battery holder switch

About debugging:
The machine is powered by 3 to 5V DC power. Turn on the power and turn on the power switch.
At this time, the buzzer will sound.

The LED is bright, slowly adjust the VR1 potentiometer, so that the buzzer just does not ring.
To adjust the potentiometer to affect the detection distance, the detection distance of the machine is less than 6 cm, affected by the size of the detected object and the environment.

Tools required for assembly testing:
Electric iron, universal meter, tweezers, diagonal pliers, charging treasure

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