To encounter an electric cable when drilling a hole in a wall can have
catastrophic consequences. Likewise to drill into water pipes or central heating
pipes can cause major problems. That is to say nothing of course if one has the
misfortune to drill into a gas pipe.
Now with a handy metal detector it
is possible to check for metal objects in and behind walls, floors and ceilings.
An LED turns on if the detector comes into the vicinity of metal objects.
Technical Specifications:
Proximity range, adjustable up to 8cm. Battery supply : 9 volts Power
consumption : 30mA max. LED indicator (buzzer as option) Dimensions: 56 x
64mm
Parts List:
Label
Reference
Qty.
Description
C1
C3N3
1
3.3nF CERAMIC CAPACITOR
C2
C47N0
1
47nF CERAMIC CAPACITOR
D1
1N4148
1
1N4148 (1N914)
L1,L2
ROD8X50
1
AERIAL ROD 8 X 50mm , TWO WINDINGS
LD1
LED5RL
1
LED 5mm RED TD UNIVERSAL
R1
RA330E0
1
RESISTOR 1/4W 330E
R2,R3
RA470E0
2
RESISTOR 1/4W 470E
R4
RA2K7
1
RESISTOR 1/4W 2K7
R5
RA10K0
1
RESISTOR 1/4W 10K
RV1
K002SH
1
PIHER TRIM 2K2 SMALL HOR
RV2
E100LH
1
PIHER TRIM 100E LARGE HOR
SW1
S500
1
KEY SWITCH 500
T1...T3
BC547B
3
BC547B SI-NPN UN 50V-0.2A
ZD1
ZA3V9
1
ZENER DIODE 3V9-500mW
AXE
AXE
1
AXE 19mm FOR PIHER PT15
H7102B'1
H7102B'1
1
ASSEMBLING MANUAL
H7102P'1
H7102P'1
1
PARTSLIST
S509/BK
S509/BK
1
LOOSE KNOB S509/NE (BLACK)
SNAP9V
SNAP9V
1
BATTERY SNAP 9V "I" TYPE/LEADS 150mm
VK7102
VK7102
1
SUBKIT K7102 WINDING WIRE +
PCB
Options:
For those wanting an audible signal, space is provided on the print for
connecting a buzzer type SV4/12. The small PCB has been specially designed to
be incorporated into the separately available casing type G407.