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Offline danny475
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« Reply #50 on: December 04, 2010, 10:51:38 am »
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hi ispanyol2
i know i can find thats what i'm runing for
i wont the 25cm coil for a perpose
i have a 1*1m coil,so there is doubt when a target is detected by the 1*1m coil,it might be a tuna can on 10cm depth or it might be a 30*30 cm gold box at 150cm
so you have to know which on it is
and ther are two ways to know
1-you have to dig
2-a poor detecting coil such as my coil 25cm diamiter it can detect the tuna meet can at 25cm so you can know the target is neer to the surface or far
thats it all
thanks
danny 

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Offline ramTopic starter
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« Reply #51 on: December 04, 2010, 10:58:16 am »
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28 cm coil-awg #24 try 30turns just get the resistance 1.9-2ohm. remember dp is good for big deep targets. or try the xr71 schematic using dp pcb. my first proto is xr71 working freq at 400hz good for small targets.

regards, ram,

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Offline danny475
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« Reply #52 on: December 04, 2010, 11:13:06 am »
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thanks ram
i will do that
but i dont understand what you mean by xr71 arent they all the same
all the pcb's and scamatics arent the same
i thought that they dont defer
thanks ram for a second time



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« Last Edit: December 04, 2010, 11:39:52 am by seldom »
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Offline ramTopic starter
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« Reply #53 on: December 04, 2010, 12:31:25 pm »
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use dp pcb
schematic-xr71 working freq-400hz
just search here dp/xr71 schematic-it differs in parts but same pcb.

regards, ram,

Posted on: December 04, 2010, 12:24:08 PM
danny 475 click below,

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ram

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Offline danny475
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« Reply #54 on: December 04, 2010, 12:58:20 pm »
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ok ram thanks to you i'm realy thankfull
but which scamatics is the best one for the maximum depth ?
there are severel scamatics i guess
thank you realy
tc danny

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Offline ispanyol2
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« Reply #55 on: December 04, 2010, 02:44:10 pm »
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if you want to make a coil 42 cm in diameter. 0.55 lap around the spiral wire 27. Search coil cord, accompanied by the total should read 3.4 ohms. maximum value that the device will work best if made. damping resistance is 680 ohms.
one euro - 65cm
7 cm bronze money - 90cm
Copper plate 15cm - 150cm
Metal dish 22cm - 170cm
27 * 30 metal sheet - 260cm

regards

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« Reply #56 on: December 04, 2010, 11:07:32 pm »
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danny475, try the latest schematic it has a date on right side of the schematic.

best time,
ram,

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Offline haikel774
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« Reply #57 on: December 05, 2010, 09:59:02 am »
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i have buitl lcd for delta but it doesn't work only the green led works.help me please

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Offline danny475
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« Reply #58 on: December 05, 2010, 10:16:03 am »
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hi
are your parts ok
do yuo use the wright part list such as the transistors and the caps and cristal ....
do you check your micro if it has a program or no ?
dose the lcd gives out light ?
you have to check all thise
tc danny

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Offline haikel774
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« Reply #59 on: December 05, 2010, 11:48:49 am »
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hi
I use transistor L78M05CV instead 78LS05. i haven't programmed the mirco.
the lcd does't give light.

thanks

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