[x] Welcome at THunting.com!

A fun place to talk about Metal Detecting, Treasure Hunting & Prospecting. Here you can share finds and experience with thousands of members from all over the world

Join us and Register Now - Its FREE & EASY

THunting.com
Treasure Hunting & Metal Detecting Community
   
Advanced Search
*
Welcome, Guest! Please login or register HERE - It is FREE and easy.
Only registered users can post and view images on our message boards.
Did you miss your activation email?

Login with email, password and session length
Or Login Using Social Network Account
News:
Pages:  1 ... 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 ... 89   Go Down
Print
Share this topic on FacebookShare this topic on Del.icio.usShare this topic on DiggShare this topic on RedditShare this topic on Twitter
Tags:
0 Members and 2 Guests are viewing this topic.
Offline hesamavr
Copper Member
*

Join Date: Aug, 2009
Thank you10

Activity
0%

Iran, Islamic Republic of
Posts: 56
Referrals: 0

310.00 Gold
View Inventory

Awards
« Reply #130 on: February 02, 2010, 12:42:15 am »
Go Up Go Down
I found one mistake in my PCB, but it is not designing mistake. I had placed one BC557 instead of BC546. I changed it and now some situation changed.

Now, when I power ON the circuit, the speaker sounds and meter acts, but after 1-2 seconds, the speaker become silent and meter goes to zero, is it correct?
I push the Zero(Reset) button, the meter goes to half, but I can't return it to zero by Treshold.

if you see the machine is working correctly, Now, how can I detect a metal?

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg70639.html#msg70639

Logged
Offline GoldDigger1950
The Old Man and the Soil
Global Moderator
Platin Member
*****

Just call me GD.
The Old Man and the Soil
Join Date: Jun, 2009
Thank you226

Activity
1%
Male
United States
Posts: 11221
Referrals: 12

47848.00 Gold
View Inventory

Awards

Garrett Groundhog ADS, Garrett Sea Hunter, Bounty Hunter Tracker IV, Bounty Hunter Pioneer 505,Minelab Eldorado Mk II, Tesoro Compadre, Tesoro Tiger Shark & A Few Home Brew Detectors
« Reply #131 on: February 02, 2010, 05:50:44 am »
Go Up Go Down
Quote:Posted by hesamavr
I found one mistake in my PCB, but it is not designing mistake. I had placed one BC557 instead of BC546. I changed it and now some situation changed.

Now, when I power ON the circuit, the speaker sounds and meter acts, but after 1-2 seconds, the speaker become silent and meter goes to zero, is it correct?
I push the Zero(Reset) button, the meter goes to half, but I can't return it to zero by Treshold.

if you see the machine is working correctly, Now, how can I detect a metal?


That may be correct operation. Some detectors do that as a battery test. Brief sound and meter deflection means the batteries are good.

Have you tried placing metal under the coil to see if there is any reaction?

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg70665.html#msg70665

Logged
It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
Offline hesamavr
Copper Member
*

Join Date: Aug, 2009
Thank you10

Activity
0%

Iran, Islamic Republic of
Posts: 56
Referrals: 0

310.00 Gold
View Inventory

Awards
« Reply #132 on: February 02, 2010, 05:56:12 am »
Go Up Go Down
Quote:Posted by GoldDigger1950
That may be correct operation. Some detectors do that as a battery test. Brief sound and meter deflection means the batteries are good.

Have you tried placing metal under the coil to see if there is any reaction?


Yes, but it doesn't react to metal. I mean no action in front of metal. it needs some adjustment?, or it has problem again?

Successful constructors can help us by mentioning some critical circuit voltages.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg70670.html#msg70670

« Last Edit: February 02, 2010, 06:06:12 am by hesamavr » 		Logged
Offline GoldDigger1950
The Old Man and the Soil
Global Moderator
Platin Member
*****

Just call me GD.
The Old Man and the Soil
Join Date: Jun, 2009
Thank you226

Activity
1%
Male
United States
Posts: 11221
Referrals: 12

47848.00 Gold
View Inventory

Awards

Garrett Groundhog ADS, Garrett Sea Hunter, Bounty Hunter Tracker IV, Bounty Hunter Pioneer 505,Minelab Eldorado Mk II, Tesoro Compadre, Tesoro Tiger Shark & A Few Home Brew Detectors
« Reply #133 on: February 02, 2010, 06:06:52 am »
Go Up Go Down
Quote:Posted by hesamavr
Yes, but it doesn't react to metal. I mean no action in front of metal. it needs some adjustment?, or it has problem again?


It does sound like there's still something incorrect. May I assume you have done a good visual inspection to be sure all parts are correct?

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg70671.html#msg70671

Logged
It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
Offline hesamavr
Copper Member
*

Join Date: Aug, 2009
Thank you10

Activity
0%

Iran, Islamic Republic of
Posts: 56
Referrals: 0

310.00 Gold
View Inventory

Awards
« Reply #134 on: February 02, 2010, 10:40:07 am »
Go Up Go Down
Quote:Posted by GoldDigger1950
It does sound like there's still something incorrect. May I assume you have done a good visual inspection to be sure all parts are correct?


OK, I will check it again, but I think this schematic has differences with the introduced PCB in the forum. please help me also with critical circuit voltages. Cool



I checked it. no problem.

the only thing that you can help me is the voltages in your successful circuit. thanks

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg70708.html#msg70708

« Last Edit: February 02, 2010, 10:42:38 am by hesamavr » 		Logged
Offline GoldDigger1950
The Old Man and the Soil
Global Moderator
Platin Member
*****

Just call me GD.
The Old Man and the Soil
Join Date: Jun, 2009
Thank you226

Activity
1%
Male
United States
Posts: 11221
Referrals: 12

47848.00 Gold
View Inventory

Awards

Garrett Groundhog ADS, Garrett Sea Hunter, Bounty Hunter Tracker IV, Bounty Hunter Pioneer 505,Minelab Eldorado Mk II, Tesoro Compadre, Tesoro Tiger Shark & A Few Home Brew Detectors
« Reply #135 on: February 02, 2010, 01:54:48 pm »
Go Up Go Down
Quote:Posted by hesamavr
OK, I will check it again, but I think this schematic has differences with the introduced PCB in the forum. please help me also with critical circuit voltages. Cool



I checked it. no problem.

the only thing that you can help me is the voltages in your successful circuit. thanks


I've never built one. Would you post your circuit diagrams and PC board here? Post exactly what you are working with and I'll have a look at it.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg70742.html#msg70742

Logged
It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
Offline hesamavr
Copper Member
*

Join Date: Aug, 2009
Thank you10

Activity
0%

Iran, Islamic Republic of
Posts: 56
Referrals: 0

310.00 Gold
View Inventory

Awards
« Reply #136 on: February 05, 2010, 10:35:03 am »
Go Up Go Down
Quote:Posted by GoldDigger1950
I've never built one. Would you post your circuit diagrams and PC board here? Post exactly what you are working with and I'll have a look at it.


I've attached them. Thank you for your help, my dear friend.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg71141.html#msg71141


There are 3 attachment(s) in this post which you can not view or download

Please register for viewing them.

P1.pdf
P2.pdf
PCB.pdf

Logged
Offline GoldDigger1950
The Old Man and the Soil
Global Moderator
Platin Member
*****

Just call me GD.
The Old Man and the Soil
Join Date: Jun, 2009
Thank you226

Activity
1%
Male
United States
Posts: 11221
Referrals: 12

47848.00 Gold
View Inventory

Awards

Garrett Groundhog ADS, Garrett Sea Hunter, Bounty Hunter Tracker IV, Bounty Hunter Pioneer 505,Minelab Eldorado Mk II, Tesoro Compadre, Tesoro Tiger Shark & A Few Home Brew Detectors
« Reply #137 on: February 05, 2010, 02:53:48 pm »
Go Up Go Down
Quote:Posted by hesamavr
I've attached them. Thank you for your help, my dear friend.


The one labeled PCB.pdf is actually the parts placement. Do you have the PCB itself?

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg71185.html#msg71185

Logged
It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
Offline Mr_Fixit
Pull Tab
*

Sanity is relative.... just none of mine.
Join Date: Feb, 2010
Thank you0

Activity
0%
Male
United States
Posts: 8
Referrals: 0

20.00 Gold
View Inventory

Awards

None
« Reply #138 on: February 05, 2010, 03:06:25 pm »
Go Up Go Down
All,

Where do we find these downloads? Perhaps that is a stupid question, but I see many references to a download section, but never see a link or any way to get to this area.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg71187.html#msg71187

Logged
Offline hesamavr
Copper Member
*

Join Date: Aug, 2009
Thank you10

Activity
0%

Iran, Islamic Republic of
Posts: 56
Referrals: 0

310.00 Gold
View Inventory

Awards
« Reply #139 on: February 05, 2010, 03:20:23 pm »
Go Up Go Down
Quote:Posted by GoldDigger1950
The one labeled PCB.pdf is actually the parts placement. Do you have the PCB itself?


PCB is from Protel DXP. PCB was created with Auto Routing system, I mean no error in it, because the software will track the PCB itself, then you can modify it. I'm wondering because I can't find any mistake in schematic, why circuit has problem?

Please tell me, if you have protel DXP, I will upload the PCB here.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,2887.msg71194.html#msg71194


There are 1 attachment(s) in this post which you can not view or download

Please register for viewing them.

PCB.jpg

« Last Edit: February 05, 2010, 03:26:10 pm by hesamavr » 		Logged
Print
Pages:  1 ... 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 ... 89   Go Up
Jump to:  

Powered by SMF 1.1.19 | SMF © 2005, Simple Machines | Sitemap
Copyright THunting.com