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Treasure Hunting & Metal Detecting Forum Message Boards - Detector Hunter Whites Minelab Tesoro XP > Tech Talk > Metal Detectors > PI Designs & Deepseekers (Moderators: Eugene52, Cornelius) >

HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS

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supergold

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #250 on: September 29, 2012, 01:54:52 pm »

check the signal R/W in the display side if it is ground , it must be, if not connected make a sintom like yours.
good luck

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #251 on: September 29, 2012, 02:15:27 pm »

Hi,

pin 5 on LCD (R/W) goes to Pin 5 on Chance Baord. Pin 5 on Chance Board is GND.

So R/W Pin on LCD ist linked to Ground .... Waveing

regards

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supergold

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #252 on: September 29, 2012, 02:22:24 pm »

the keypad works? you can raise volume? if it works ,better try another display .

just an opinion.

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #253 on: September 29, 2012, 02:35:51 pm »

all buttons are give a signal when i press it. when i press the button in the middle of keypad i can hear the volume are louder or quieter ...

The S2 button, turn the LCD backlight on ... hit it again, backlight are off...

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #254 on: September 29, 2012, 02:45:10 pm »

that means the atmega is working, it can be the display itself not working. good luck

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #255 on: September 29, 2012, 02:49:13 pm »

ok, so i try a other display now .... hope it works

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #256 on: September 30, 2012, 04:50:35 pm »

Hi Supergold!

you were right! the display was faulty! I took another one and the Chance works now!

Great job! Thanks Supergold Pray

Here some pictures from MY Chance with Monocoil ....

regards Firebox

EDIT: other question. When I change values in the Menue of the chance and turn power off and on the values are permanent in the Memory. Only the Light Value is always in Position "OFF"..... so every time I turn it on I have to readjust this value. Is it possible to set the light "on" in the permanent memory Huh?

?

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supergold

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #257 on: September 30, 2012, 06:22:45 pm »

hello , you are welcome , glad that you have solved your problem, the light issue is: it was not considered on the progamming code of the atmel to store the light status . nothing to do with that , but you can put a switch an switch it manually.

i am disapointed with this project , is very poor in sensivity and very instable descrimination, can the autor share the source code of the atmel for us try to improve it ,
guys i think that we can make it better than it is. Idea

good luck to all

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	Re: HOW TO MAKE FULL DISCRIM. PULSE INDUCTION MACHINE UNDER 50 BUCKS « Reply #258 on: October 02, 2012, 04:40:42 am »

Hi, do you know where I need to install the switch to turn on the Backlight manually ?

and can you explain the function of the barrier and raise volume switch? what exactly do they do?

I've tried a lot with the iron mask value, but I could not reach a good iron suppression.

The Value of my Monocoil: 1,9 Ohm resistor, 0,475 uH Inductivity, Diameter: 9.85 " inches (25 cm)

I set the guard intervall to 24. The chance runs after ZERO quiet !! ....

My testobjects are some german coins:

Coin: Depth:
1 Euro 23-24 cm (9 inches)
50 Cent 18-19 cm (7 inches)
20 Cent: 17 cm (6,6 inches)
10 Cent 16 cm (6,2 inches)
1 Cent: 14 cm (5,5 inches)

but sometimes I also get a lot of erroneous signals. After i press the ZERO Button, the detektor runs quiet again.

By the way, which value for the L1 resistor on chance board is recommended? I would like to replace the resistor against a choke coil.

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