Need this circuit printed circuit board

[yhl]

Need this board size. How many centimeters in length and width.

Need this board size. How many centimeters in length and width.

[WM6]

Need this board size. How many centimeters in length and width.

122mm x 66mm or 12.2cm x 6.6cm or 4.8" x 2.6"

[silverdog]

mmm, nice single sided design
Anyone interested if I get some boards made ?

IC7 looks ok
IC8 depends on manufacturer - been caught by that before !
Anyone care to translate the pdf ?

[WM6]

mmm, nice single sided design
Anyone interested if I get some boards made ?

IC7 looks ok
IC8 depends on manufacturer - been caught by that before !
Anyone care to translate the pdf ?

Fot quality boards as yours I am permanently interested.

Here some Google translation (editing of native Eng. speakers welcome):

Projects

Metal Detector Long-range

That is something for seekers of the past missing memorabilia

Pulse detectors are a number of advantages over with detectors working in different way. You can access them primarily include large coverage of almost the same in the air and on land, very good sensitivity and complete insensitivity to changes in soil mineralization. The disadvantage is the lack of distinguish between ferro metals and diamagnetic.

Testimonials: excellent project to do on vacation. It is able to integrate the whole family around a treasure hunt.

Schematic diagram of the detector are shown in Figure 1 The detector operates on the principle of electromagnetic pulse emission-tion into the soil. The presence of metal objects-here close to the probe, due to changes in the inductance coil of the detector, causes deformation of the tension on the coil. The signal from the coil is subjected to strengthen-Niu and after excision of the fragment is of interest to us, has again reinforced-ny and the merger. That trimmed the generator controls the VCO, whose output signal is heard in the speaker or headphones.

The detector consists of a number of basic blocks. Description of the action we start from the principle of generation and sta-stabilization voltages. It uses a unique way of analog power: weight combined with a positive current-voltage detector gunem. For-this also for a positive voltage for the analog involves the use of booster power converter, which in the described arrangement ZRE-Cooperation involves using IC5 (NE555).

The inverter does not feed too much current, so it works in the configura guracji pump load. In the first cycle through the diode D4 of the capacitor C15 is charged to the supply voltage, and then be (in the second cycle) energy in the Assembly appointed, through the diode D2 is transferred to the capacitor C18.

This causes the charging capacitor C18 voltage great-know equal to twice the supply voltage detector. "Almost" because it is in-mniejszone ospadki tensions in the diodes D2, D4. Layout of the diodes D3, D5 and capacitor C19 operates similarly to the one described earlier with the only difference being that the input voltage is equal to the voltage on the capacitor C18. The entire converter reproduces the value of a voltage detector, nearly three times the power.

Operational amplifiers are powered symmetric value of ± 5 V. The mass to stabilize the analog and correspond to the stabilizers IC7 IC8.
Capacitors C4, C14, C24, C16, C19, C20, C25 filter the supply voltages. Re-run the rectangular power generating coil-tion by the second circuit NE555 (IC4). Determine the signal frequency components C2, R1, PR2. It should be equal to about 100 Hz, and a negative pulse at the output of IC4 should have a length of about 150 ms.

Signal from the output of IC4 through resistor R 4 is controlled by transistor T2, which turns him on stage. Then, through a resistor R6 drives the power transistor T1 coil L1 probe. Resistor R8 is intended to limit the voltage-self-induction coil L1. The signal from the probe, through a resistor R9 and a capacitor C9, goes to the inverting input of operational amplifier IC1. Zener diode D1 is a secured-care input surge.

To enable sampling of demar-reinforced signal from the coil when it passes through zero, the use of two monostable generators built on NAND gates in circuit IC2 (CD4011). Both generators are connected in cascade. The first, built on the goals and IC2B IC2A, generates a pulse with a length of 60 ms and triggers the second, built-in gates ny IC2D and IC2E, and generating a pulse length of 85 MS. Construction of the two power packs monostable, ignoring the values of elements R and C, is identical, so the following describes the principle of only one.

At the time of the initial capacitor C5 is discharged. Falling edge of the collector voltage of transistor T2 causes with the immediate change in the starting gate IC2A a logical "0" to "1 ". Until discharged capacitor C5 starts charging-wac through resistor R11. Current charging the capacitor C5-tion forces the gateway entrances IC2B high, which causes changes-mixture of its output to low, and thus maintain low state at the inputs of gate IC2A until the con-charge capacitor C5. Falling edge at the output of the first flip-flop causes the liberation that the second flip-flop. The positive pulse from the output of the second flip-flop has the task is not to open the transistor T5 and transferred through R17 and C10 viewable signal on inverting input the amplifier IC3 Integral.

For this amplifier inverting input voltage is fixed by means of potentiometers adjustable coarse and fine tune the detector. As a result of summing these two voltages, on removing the amplifier IC3 receive a sawtooth signal having an adjustable constant component, whose value also indicates the presence of metal objects within range of the coil L1. The signal from the output of an integrating amplifier IC3 is fed further via the transistor T3 in the generator voltage controlled (VCO), made on the basis of IC6. The negative pulses from the output 3 of the voltage follower IC6 transistor T4 feed the speaker SP1. In addition, it is possible to adjust the volume using the potentiometer P3 allows adjustment of Figure 2 Installation diagram of the detector plate voltage follower input.

Installation and commissioning of the detector

Installation diagram is shown in Figure 2 Commissioning of the detector to ini-Panama to validate the work-ing part of the supply. To this end, the board layouts only solder IC5, IC7, IC8, capacitors C4, C14, C24, C18, C19, C20, C25, C16, C21, C22 and resistors R31 and R30. Then turn power the detector and check the presence of voltage ± 5 V to 7 feet and 4 circuits IC1 and IC3. Measurement of supply plus we respect you detectorist.

After finding the correct values fit the remaining components of the generator voltage signal of the coil (IC4, T1, T2, C1, C2, R1, R4, R5, R6, R7, R8 and potentiometer assembly PR2). Connect the probe to the points marked-destined to, a printed circuit board as "COIL1, COIL2" and turn on the power - we should hear the quiet hum of the probe. If we are in position dyspo frequency meter or oscilloscope loskopem is set on a stem 3 of IC4 100th .. the frequency of 110 Hz. Once these factors stances on PCB mount other elements.

For points marked on the plate as P3.1, P3.2, P3.3 using a piece of tri wire cable connect the potentiometer regulating the volume, while the points of P1.1, P1.2, P1.3 tuning potentiometers. The next step will be the maximum rotation of su-waka volume knob in the direction of the output of IC6 wall. The probe detector placed so as to be barred from any metal objects at a distance of at least 1 m. We set the coarse tuning potentiometers on the panel and the exact position of the detector in the middle and gently twists-ing assembly potentiometer PR1. Set the frequency of volume-carrier clatter for about 0.5 ... 2 Hz.

After this check-tion reaction to the approximation of the detector to the coil of metal objects. Properly constructed of a material detector clearly indicates the presence of input voltage follower.

Tech data:

• Board sided with dimensions 122 × 66 mm
• Power supply: 12 VDC lead battery / 1.3 Ah, the power consumption of 100 mA, power 12 VDC external power
• The construction of analog-digital systems that require no programming
• Large coverage: virtually the same in the air as the earth
• High Sensitivity

[bernte_one]

i´ve made a board last weekend
the files i have direct by marius from polen
contact himself he is the author he can say you the right part values
by him it is working look for his youtube video he is ok

@ silverdog please contact for surf pi pcb
want to have some
have no time to etch got a baby

[yhl]

The LF357 op amp IC1, what can replace it?

The LF357 op amp IC1, what can replace it?

[WM6]

The LF357 op amp IC1, what can replace it?

uA709 etc.

[yhl]

This circuit, and Gary pulse 1 Who is the best?

This circuit, and Gary pulse 1 Who is the best?

[yhl]

Hello my friend

Gary Pulse 1 I've done, testing the depth of fine. I now want to Poland this circuit. This circuit can use spiral coil it? Gary pulse circuit Poland 1 please?

[WM6]

This circuit can use spiral coil it? Gary pulse circuit Poland 1 please?

All PI detectors can use spiral coil. If you build one for Garry PI you can use it with Poland PI too.

I do not understand what you mean by: "Gary pulse circuit Poland 1 please?"? You have all schematic and board data. I translate instruction in English too.

[yhl]

Hi mw6

I mean, GARY PI1 and Poland Circuit, who is the best? Poland circuits can increase the meter?

[yhl]

mw6

Poland detector you build it?

[cristi71]

poland detector

We built this detector and does not work. Does anyone coil data? number of turns and coil diameter. all units running but does not feel anything to the coil. thanks

[cristi71]

poland detector

mention, when approaching a metal coil that vibrates, so the oscillator transistor and the final work but sound does not change anything. the tuning and it works. all voltages are ok. lf357 have changed but are equivalent to 356 lf. and still not working. can someone help me? Thanks.

[silverdog]

I have a Polish .pdf doc about this detector - it states the coil is made from 16 meters of 0.5mm wire on a 30-40cm former