Explorer This PI ...

[zenit52]

Hi okantex,

I must tell I no very know about samples etc...
I need your and everyone helps to next step...

Did you think is better I use 2 coil one for Tx another one for RX ... ?

with best regards... zenit52

[okantex]

I do not know anything about use of 2 coils for PIs.

[rajesh]

metal detector

Hi rajesh,

Yes GPR is better and more better ......... I know too
But it is difficult and expensive to build by us ... is it?
If you have a good idea to start building gpr system please share it ...?
with best regrads...
zenit52

hi zenit everything is possible you need a proper link you can consult germny's any technission i have many pi but not able to detect treasure at historical palace....

[okantex]

Zenith52 ,

I would like to program this chip with basic for PI detectors

would you like to teach us here ,how to write it?

regards
Okantex

[zenit52]

Hi okantex,
I sorry for my delay,
I sick these days...
If i better work on my design on PCB board and test it in real condition,
For writing program for micro you must learn basic language and then work with BASCOM-AVR sofware and then simulate your program and circuit with proteus software ...
If you want I have cracked and last version of these software ...!!!
and can give these software to you...

With best regards... zenit52

[okantex]

Hi Zenith ,
God bless you .I hope you will recover fast.
thanks for proteus offer ,I have it.maybe old version bbut I have one to do simulations.
once a time I did simulations of pıc 16f877 by picpro written software two years ago.
I am familiar to basic from childhood .just need to learn some new commands.
problem is that I do not know protocol (procedure ) of starting to program a chip.I do not know what to define at first about chip.
for example to program a chip again sometimes you need give special commands.
anyhow can you give me your algoritm written as command at basic for your simulation.

can you teach me how to program atmega in basics.
If I read something written in basics for PI , I am sure I can understand how to write others for different programs for same PI.
regards
Okan

[zenit52]

Hi Okan,

Thanks from you...
It is good that you are familiar and know basic language ...
For start programing Atmega micros you must work with
BASCOM-AVR sofware, I have last version 1.11.9.0 cracked version,
This software have and almost complete and good HELP for beginners...
After you learn how to use commands in BASCOM-AVR you ready to
your code to your idea,
For one PI we must produce with programming, pulse at a micro's pin, with a frequency and a pulse width that changeable by us... !!!
You start programming with BASCOM-AVR and I hope you can do, what you want...
with best regards... zenit52

[okantex]

Okay, I downloaded same version of bascom .but help menu doesnot work.
so what to do than.
is there any site shows how to use it by pictures.
and also with program samples.

[Mustafa]

Hi okantex,
If you don't know any programming language, Basic is a wrong start. Start learning C. Programming micros in C is better and I can help you.
Selamlar,
Mustafa

[Mustafa]

Last week I started to learning AVR assembler.
For training I am using the simplest detector with microcontroller, BT1 from böses Tier.
This is original assembler code

.include "tn12def.inc"
.equ      PulsDauer    = 4   ;1..20 ca 10..200 yS 
.equ      HalbZyklus    = 80  ;Gesamtzyklus ca 1,7 mS 2 mal 80+ yS 
.equ      Delay1    = 5    ;Sample-Delay 1 nach Pulsende 3-15 
.equ      Delay2    = 8    ;Sample-Delay 2 nach Delay 1 
;----------------------------------------------------------------------- 
      rjmp    main  ;$000 Power On Reset handler 
      reti                 
      reti                 
      reti                 
      reti                 
      reti                 
main:     nop 

      cbi    DDRB,0    ; PB0 IN OPV comperator 
      cbi    DDRB,1    ; PB1 IN poti comperator 
      sbi    DDRB,2    ; PB2 OUT SPEAKER 
      sbi    DDRB,3    ; PB3 OUT Endstufe 
      sbi    DDRB,4    ; PB4 OUT LED 
;----------------------------------------------------------------------- 
mainloop:    wdr 
      ldi    r16,HalbZyklus  ;wait ca. 800 yS  
wait801:    rcall   wait10 
      subi    r16,1 
      brcc    wait801    ;Warteschleife 
      ldi    r16,0b0001000  ;PB3=1 
      out    PORTB,r16    ;IMPULS ON  
      wdr 
      ldi    r16,PulsDauer  ;wait 150 yS IMPULS 
wait150:    rcall   wait10 
      subi    r16,1     ;Warteschleife 
      brcc    wait150 
      ldi    r16,0b0000000  ;PB3=0 
      out    PORTB,r16    ;IMPULS OFF 
      wdr 
      ldi    r16,Delay1    ; 1. sampledelay 
wait81:    rcall   wait10 
      subi    r16,1 
      brcc    wait81    ;Warteschleife 
      in    r24,ACSR    ;check COMPERATOR 
      ldi    r16,0b0000000  ;alles aus oder ... 
      sbrs    r24,5     ;wenn schwellwert skip next  
      ldi    r16,0b0000100  ;PB2=1 Speakerimpuls Ton1 
      out    PORTB,r16 
      ldi    r16,Delay2    ; 2. sampledelay 
wait82:    rcall   wait10 
      subi    r16,1 
      brcc    wait82    ;Warteschleife 
      in    r24,ACSR 
      ldi    r16,0b0000000  ;alles aus oder ... 
      sbrs    r24,5     ;wenn schwellwert skip next 
      ldi    r16,0b0010100 
      ;breiter Sekundärimpuls PB2=1 PB4=1 LED=ON und Ton2 
      out    PORTB,r16 
      wdr 
      ldi    r16,HalbZyklus  ; HI für LED und SPK 
wait802:    rcall   wait10 
      subi    r16,1 
      brcc    wait802 
      ldi    r16,0b0000000  ;alle Lichtel aus ;-) PB2-4 
      out    PORTB,r16    ;LO für LED und SPK 
skip:     rjmp    mainloop 
;------------------------------------------------------------------------- 
wait10:    ldi    r25,2     ;warte 10 yS bei 1,2MHz 
w10:      subi    r25,1 
      brcc    w10 
      ret 
;-------------------------------------------------------------------------

Now I am using mikroC for AVR

const int PulsDauer    = 4;    // 1..20 ca 10..200 yS
const int HalbZyklus = 80;  // Gesamtzyklus ca 1,7 mS 2 mal 80+ yS
const int Delay1 = 5;       // Sample-Delay 1 nach Pulsende 3-15
const int Delay2 = 8;       // Sample-Delay 2 nach Delay 1

void DelayX10(unsigned int count) {
    do {
        Delay_10us();
    } while(--count);
}

void main() {
// PB0 IN OPV comperator
// PB1 IN poti comperator
// PB2 OUT SPEAKER
// PB3 OUT Endstufe
// PB4 OUT LED
    DDRB = 0b00011100;
    for(;;) {
        asm wdr;
        DelayX10(HalbZyklus);   // wait ca. 800 yS
        PORTB = 0b00001000;     // PB3=1    IMPULS ON

        asm wdr;
        DelayX10(PulsDauer);    // wait 150 yS IMPULS
        PORTB = 0b00000000;     // PB3=0    IMPULS OFF

        asm wdr;
        DelayX10(Delay1);       // 1. sampledelay

        if(ACO_bit)             // check COMPERATOR // ACSR.B5
            PORTB = 0b00000000; // alles aus oder ... wenn schwellwert
        else
           PORTB = 0b00000100; // PB2=1 Speakerimpuls Ton1

        DelayX10(Delay2);       // 2. sampledelay

        if(ACO_bit)             // check COMPERATOR // ACSR.B5
            PORTB = 0b00000000; // alles aus oder ... wenn schwellwert
        else
            PORTB = 0b00010100; // breiter Sekundärimpuls PB2=1 PB4=1 LED=ON und Ton2

        asm wdr;

        DelayX10(HalbZyklus);       // HI für LED und SPK

        PORTB = 0b00000000; // alle Lichtel aus ;-) PB2-4   LO für LED und SPK
    }
}

[Mustafa]

This is machine translation from German document:
The Pulsdetektor BT-1 (BT stands for evil animal GRINS * *) is for two reasons
emerged. First, from the intense preoccupation with the possibilities
The fully digital signal processing with AVR processors and the other from the
Pulsdetektoren idea into a robust body with standard tube
Diameter (eg 40mm KG pipe from the hardware store) for subscription. The installation
in a tube is, moreover, for the construction of an underwater detector very
useful ;-) This circuit was actually only for experimental purposes
but thought I liked so much that it I've built a detector. Planned
is the part of me first as a hand digging around the detector and the
Digging holes to browse, because this task for a large detector
unwieldy, and a large coil for positioning the Fund to play imprecise
is. For this task, I have even a rudimentary metal differentiation (LED)
installed.

The component cost and the size should be limited. That
was achieved by the abandonment of the tone and the difference amplifier
by the processor over. As the processor was chosen ATtiny12
because it has the necessary Comperator a small design (8Pin DIP) and a
internal clock, and hence the circuitry required for the
Processor clock lapses. In addition, should do everything as cheaply as possible
fail? and obtainable at a vendor's (hence also a IRF9640
as the MTP is not so good is available).

At this point I would like to refer explicitly to www.pulsdetektor.de, there
lurks the contagious virus detector. And I have Silent Water and Chris thank.
Without the two, I would have a bloody amateur must throw in the towel. If
in this document contains errors (which is quite likely), please use this
pulsdetektor.de in the forum of discussion.

Technical Data

Operating voltage: 7 - 15V / DC
Operating current: 60 - 120 mA (software / Voltage Dependent)
Frequency: 300-500 Hz (software dependent)
Pulse duration: 10 - 200 yS (software setting)
Battery / Battery: 6-12 Nc / Ni-MH, 9Volt block, 5-10 Alcaline
Range: up to 70cm (object-dependent and coils)

Functioning
Amplifier
OPV
Drivers
Processor
Drivers
In Pulsdetektor BT-1 is the control of one of the ATtiny12 microcontroller
Atmel company over. The whole timing can be adjusted in the program
are (pulse duration, HalbZyklus, Delay1, Delay2). The processor generates a
Distance of approximately 1.7 - 3.5 mS (2xHalbZyklus + Pulse + Delay1 + Delay2) a
Pulse 10 to 200 yS width (pulse duration = 1 .20). The pulse is located on PB3
(PIN2 ATtiny12) and is controlled via a driver stage (BC547, CNY17) to the
Power transistor IRF9640 given. The driver stage is necessary because the
Outputs of the ATtiny12 with max 3mA (active HI) may be charged. The output
transistor switches the primary of the pulse from a 4700 to 10,000 YF Elko
is fed. The coil creating a electromagnetic pulse. After
the disconnection of the pulse occurring secondary signal (for metal coils in close
changed the course of the falling edge) is taken from the operational amplifiers
(LF357) and reinforces the Comperatoreingang PB1 (PIN6 ATtiny12) of
Microcontroller where. The Comperator works continuously and compares the
Tension between PB0 and PB1 (PIN5 / 6 ATtiny12). The reference voltage is
on the switch with potentiometer (voltage divider on the mass and +5 V, Abgreifpunkt to
PIN5) led to PB0. The evaluation of the software is Comperators
a break (Delay1) performed. If this Austastzeitpunkt to send a signal to
PB1 on the reference voltage at PB0, an impulse to the Speaker (PB2)
where. The speaker is powered by a transistor (BC547) driven. After a
another break (Delay2), the Comperatorstatus re queried. If the level
PB1 to still greater than the reference voltage at PB0, is a very broad
Secondary signal as it is only in the case of iron or very large objects occurs, and the
Speaker pulse is extended to a different sound to produce then the LED
switched on. See the pictures from Oszi. So you can on the LED and
the tone of size or metal close. The LED, it is with
high probability of iron or a huge lump of gold ;-)

Waveform without metal in the search for a euro and in the search.
Yellow, the reference voltage from the potentiometer and the two of Austastzeitpunkte
Comperators. Red by the operational amplifiers processed signal.

Waveform with a small screwdriver (iron) and a larger
Brass object.

Apparently, the shortening of the sample 1, a delay path to higher
Sensitivity but also a shift in the critical area of steep
falling curve which is practically not so good results. The timing is in
each concrete case to the coil (inductance) and the supply voltage (7-15V)
adapt. The brutal Improve the supply voltage to 15V brings less
as too is suspect. With a 9V block just to get good results in
less space and weight.

The Halbzykluszeit the main loop can be changed. It is
However, please note that the change in the throughput of a main loop
Tonveränderung means.
For the driver stage (BC547 max. 100mA load) of the Speakers (8Ohm) where
Using a headphone (32Ohm) of 50 ohms resistance at 22 ohms
reduced.

The power supply may not be less than 7V is because otherwise the voltage
78L05 no longer clean 5V power supplies.

Special circuitry technical measures for a trouble-free Power On
Reset to ensure that are not necessary since the ATtiny12 on a delayed
Power On Reset cycle.

Handling
At startup must be no metal in the search of his coil. On Poti with
Switch and turn the knob fully. Then the pot slowly
back to regulate LED and speaker are all (here is the art of the most sensitive
Area to meet). Ready!

Typical behavior:
When you find metal speaks first to the Speaker. When iron shortly thereafter, when
further approximation, the LED and the tone is changing. At
Non-ferrous metals, the LED does not speak or only much later.

Very small or very large objects:
For very large objects also speaks to the LED. Over the whole
Annäherungsweg is but one more time, switching the LED on iron and
Connect a rather late to include precious metals.
For very small ferrous objects can also be from the LED will remain is the
But slow beep when removing the coil quickly away again.

Coil (Planarspule)

- Cover with foil backing
- A form of inner diameter (100mm x 5mm high) fix
(screwed here).
- Gap between the core document form seal (eg silicone).
- Approx. 5cm to the ring around with tough glue evenly prepared.
For example, with UHU glue einpinseln Force 3-5 minutes and can be tough.
- Coil wire from the inside out with gentle pressure, spirals and closely
24 adjacent coils wrap around the nucleus
(the tenacious glue holds the wire in position).
- In 5mm distance to the coil around a 5 mm high draw bead of silicone.
- Coil with epoxy pourout.
- In a piece of pipe body about 7-8 cm long connecting piece of
Epoxy cast. Thus the coil can fit into the tube to be driven
and this close.
- After curing both parts with 2 component glue stick.

Housing

- 0.5 m sewage pipe with diameter 40mm bevelled cut
- Electrical 40mm diameter tube as the carrier halved lengthwise
- Makers glue flap closure
- Battery Holder, Speaker (35mm max), LED and potentiometer with switch
wiring and install (see picture)
- PCB and connect the carrier lock
- Stocked carriers to introduce into the tube
- Coil connected with the coil and the other side of the sealed tube
- Dismantling in reverse order ;-)

[Unregistered]

attiny12 ---> attiny15