Little help :D

[homefire]

This board is labled.

[eessoo]

PCB

[eessoo]

what are these components (marked on the pic)?

[eessoo]

please have a look at this circuit and tell me if it works

Parts list:

Resistors:

R1, R10, R22, R35: 100kΩ
R2: 3.3kΩ
R3, R7, R8, R13, R14, R21, R33: 1kΩ
R4, R5: 100Ω
R6: 220Ω 1/2 W
R9: 1MΩ
R11, R20, R23, R32: 22kΩ
R12, R27: 10kΩ
R15, R16, R17: 220kΩ
R18: 47kΩ
R26, R29: 51kΩ
R28: 210kΩ
R34: 150Ω
R25: 50kΩ trim potentiometer
R10: 100kΩ trim potentiometer
R33: 1kΩ trim pot. (volume control)
P1: 10kΩ potentiometer (THRESH)
P2: 100kΩ potentiometer (DISC)
Coil:

Note: It's best to use the original Surfmaster coil for optimal performance, but you can experiment with different turns, wire gauge and coil diameters, shielding...
A reasonable depth and sensitivity can be obtained with a 23cm diameter coil, 20 turns made with 0.5mm (24 gauge) standard copper enamel coated wire.
Capacitors:

C1: 22nF
C2: 1000uF/25V electrolytic
C3, C4, C8, C16: 100nF
C5, C6, C7: 470nF
C9, C10, C11, C12: 1nF
C13, C14, C15: 220uF/10V electrolytic
Transistors:

Q1: 2N3906 (PNP silicon transistor)
Q2: TIP32C (PNP silicon power transistor)
Q6: MPSA13 (NPN Darlington transistor)
Diodes:

D1, D2, D3: 1N4148 (Switching diodes)
D6: 1N4001 (Rectifier diode)
D7: 1N5819 (Schottky Barrier Rectifier)
D5: 1N755 (7.5V Zener diode)
Integrated circuits:

U1: TLC555 (LinCMOS timer IC)
U2: NE5534 (Single Low Noise Op Amp)
U3: LM358 (Low Power Dual Op Amp)
U4: MC14093B (Quad Schmitt trigger)
U5: 78L05 (5V Positive Voltage Regulator)
U6: ICL7660 (CMOS switched-capacitor voltage converter)
U7: CD4066 (Quad Bilateral Switch)

[jap]

read

Hi eessoo
There is enough information about each**** you must**** read before you start.
1-Surf PI. pcb in page 11.
2-BARACUDA .pcb in page 2.
best time
j.

[eessoo]

can u send me the PCB design ?

[jap]

Hi eessoo
****any metal detector can detect metal 10cmx3 cube at 20cm**** .
simple:-two they could detect the 1Liter spray to approximately 60cm.
1-Surf PI.
2-BARACUDA .
There is enough information about each I hope read before you start.
best time
j.

[eessoo]

i need a simple metal detector that can detect metal cube (10cm*10cm*10cm) buried 20cm underground
any ideas ?!