[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
2
News:
Pages:  1 2 3 4 5 6 7   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 3 Guests are viewing this topic.
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
0%
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 #40 on: June 13, 2012, 04:57:14 am »
Go Up Go Down
Quote:Posted by viswanathmarachi
I have found another interesting thing in my circuit not sure if its common.  In the attached image the two highlighted resistors are 120K the one in green measures 120 with a multimeter when in circuit, and the other which is highlighted in red measures 10 times less i.e 12k and measures correctly(120k) when taken out of circuit.

Resistors in parallel are like that. We do need a schematic of your project.

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225512.html#msg225512

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 6666
Bronze Member
*

Join Date: Mar, 2010
Thank you23

Activity
0%
Male
Australia
Posts: 200
Referrals: 0

1060.00 Gold
View Inventory

Awards

DIY, Whites 6000d, whites 2000 PI
« Reply #41 on: June 13, 2012, 05:10:10 am »
Go Up Go Down
Viswanath M

In your post #35 you have a picture of the top of your PCB
is that how it right now ?
or have you made some changes since you took that picture ?

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225514.html#msg225514

Logged
Offline viswanathmarachiTopic starter
Copper Member
*

Join Date: Mar, 2012
Thank you1

Activity
0%
Male
United States
Posts: 31
Referrals: 0

175.00 Gold
View Inventory

Awards
« Reply #42 on: June 13, 2012, 05:44:25 am »
Go Up Go Down
Hi 6666,

Thanks for the reply.  I have made only one change i have changed a capacitor which fits right below 556 and beside PR1 (220k preset).  Previously it was 10nf now I made it 1nF which is correct.

-Viswanath M

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225519.html#msg225519

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
0%
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 #43 on: June 13, 2012, 05:47:16 am »
Go Up Go Down
We really do need to see the schematic you are using for this project before anyone can advise you any further.

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225520.html#msg225520

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 viswanathmarachiTopic starter
Copper Member
*

Join Date: Mar, 2012
Thank you1

Activity
0%
Male
United States
Posts: 31
Referrals: 0

175.00 Gold
View Inventory

Awards
« Reply #44 on: June 13, 2012, 05:52:52 am »
Go Up Go Down
Hi GD,

The attached is the schematic that I am using for my project.

-Viswanath

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225521.html#msg225521


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

Please register for viewing them.

DP Correct Circuit_Ram.jpg

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
0%
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 #45 on: June 13, 2012, 05:57:57 am »
Go Up Go Down
Thank you. I'm going to a few meetings today (business) but it is raining cats and dogs here so this afternoon, I will review the circuit.

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225523.html#msg225523

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 viswanathmarachiTopic starter
Copper Member
*

Join Date: Mar, 2012
Thank you1

Activity
0%
Male
United States
Posts: 31
Referrals: 0

175.00 Gold
View Inventory

Awards
« Reply #46 on: June 13, 2012, 06:29:58 am »
Go Up Go Down
Thank you GD.  Your kind time is much appreciated always.

-Viswanath M

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225527.html#msg225527

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
0%
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 #47 on: June 13, 2012, 06:49:57 am »
Go Up Go Down
After a cursory review, your schematic is markedly different from the one we have in our downloads area and if you mixed the schematic and board layout with another version, it may be that you have accidentally induced your own problem. Eventually, we WILL work this out.

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225528.html#msg225528

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 viswanathmarachiTopic starter
Copper Member
*

Join Date: Mar, 2012
Thank you1

Activity
0%
Male
United States
Posts: 31
Referrals: 0

175.00 Gold
View Inventory

Awards
« Reply #48 on: June 13, 2012, 06:54:40 am »
Go Up Go Down
Thanks again GD for that courtesy...

-Viswanath

Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225530.html#msg225530

Logged
Offline 6666
Bronze Member
*

Join Date: Mar, 2010
Thank you23

Activity
0%
Male
Australia
Posts: 200
Referrals: 0

1060.00 Gold
View Inventory

Awards

DIY, Whites 6000d, whites 2000 PI
« Reply #49 on: June 13, 2012, 07:18:39 am »
Go Up Go Down
Hey GD in post #1 Viswanath M called this a DP2

in comparing what is supposed to be the latest DP2 layout with
the board layout in post #35 there are some small differences in board layout
he needs to supply his board layout documents to.

Leave you with it


Linkback:

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

http://www.thunting.com/smf/index.php/topic,36323.msg225538.html#msg225538


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

Please register for viewing them.

mergeVpcb.jpg

Logged
Print
Pages:  1 2 3 4 5 6 7   Go Up
Jump to:  

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