[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 ... 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 ... 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 wil
Copper Member
*

Join Date: Feb, 2010
Thank you2

Activity
0%

United States
Posts: 48
Referrals: 0

310.00 Gold
View Inventory

Awards

homebuilt
« Reply #230 on: March 01, 2010, 10:39:56 am »
Go Up Go Down

Any chance you could share the PCB artwork of the two sided board?

Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76717.html#msg76717




Logged
Offline steaua581
Copper Member
*

Join Date: Feb, 2010
Thank you1

Activity
0%

Romania
Posts: 57
Referrals: 0

335.00 Gold
View Inventory

Awards

radio shack
« Reply #231 on: March 01, 2010, 02:35:49 pm »
Go Up Go Down

hello
i was trying to find the STTH1210D diode.....my question is can i use BYT12P-1000 instead? Sorry meaby you have mentioned that somewherre but i guess i missed it....
Are therre any mods i should be aware of besides the actual complete project posted by Eugene? If any can you please point those to me ?
thanx
regards
Marius

Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76759.html#msg76759




Logged
Offline Hobbyist
Silver Member
*

Join Date: May, 2008
Thank you4

Activity
0%

Malaysia
Posts: 1084
Referrals: 0

4220.00 Gold
View Inventory

Awards
« Reply #232 on: March 01, 2010, 07:28:38 pm »
Go Up Go Down

Quote:Posted by NIKOS
i like the part [no return] 

That's the part i don't like.

Quote:Posted by mafarid
NO NO ?159.00 is wasting money for ?15 circuit !!!!

The price is not just for the circuit, but I know what you mean. I'm sure you save a lot by building it yourself. What depth do you get on your machine?

Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76829.html#msg76829




Logged

"Gold rides an iron horse." (Old prospector Homefire)

Offline mafarid
Pull Tab
*

Join Date: Dec, 2009
Thank you1

Activity
0%
Male
Iran, Islamic Republic of
Posts: 16
Referrals: 0

90.00 Gold
View Inventory

Awards

stuart I
« Reply #233 on: March 02, 2010, 02:34:06 am »
Go Up Go Down

If I can complete my DP, its performance is same whit economic one.

What make a circuit? Schematic, Circuit board and some electronic part. If tow circuit board have same schematic and same electronic component they should have same result.  In addition, one other viewpoint with my own experience demonstrates that something in kit format has weak performance than the completed one.  So DIY


dear steaua581

you can replace STTH1210D with BYW29 without any problem.



Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76907.html#msg76907




Logged
Offline Hobbyist
Silver Member
*

Join Date: May, 2008
Thank you4

Activity
0%

Malaysia
Posts: 1084
Referrals: 0

4220.00 Gold
View Inventory

Awards
« Reply #234 on: March 02, 2010, 02:35:20 am »
Go Up Go Down

Quote:Posted by mafarid
If I can complete my DP, its performance is same whit economic one.

What make a circuit? Schematic, Circuit board and some electronic part. If tow circuit board have same schematic and same electronic component they should have same result.  In addition, one other viewpoint with my own experience demonstrates that something in kit format has weak performance than the completed one.  So DIY


I see. If you ever get your detector to work, do post the test results. Which kit format did you find to be weaker than the "completed detector"? I assume by "complete detector", you are referring to one which you buy the individual components and then assemble it yourself from scratch. Is the stronger performance of the "completed detector" due to better quality components or better build quality or some other reason?

Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76908.html#msg76908




Logged

"Gold rides an iron horse." (Old prospector Homefire)

Offline mafarid
Pull Tab
*

Join Date: Dec, 2009
Thank you1

Activity
0%
Male
Iran, Islamic Republic of
Posts: 16
Referrals: 0

90.00 Gold
View Inventory

Awards

stuart I
« Reply #235 on: March 02, 2010, 04:11:41 am »
Go Up Go Down

 Dear Hobbyist

As my knowledge if you find one circuit that sold in kit format (not only PCB), it is just for educational purpose because if you are not a beginner you construct your circuit yourself and do not waste your time(=money ) just for soldering a PCB. Soldering price for circuit like DP is very low in manufacturing line less than 0.5$.

If you buy a kit, you should assemble it and then tune it. It looks easy but it is not.
In assembling, you should know electronic parts, its values, passable polarity and finally good soldering.
If one is wrong all circuit in optimistic condition do not work.
Tuning is another problem. A good tuner should have one or both of these conditions:
1) Experiment:  it is valuable part of all works
2) Measurement instruments: they usually are expensive and you should know how use them.

Somebody says DP can detect a coin at last in 45 cm but I know one who achieve 65 cm with a little modified DP, a full normal construct DP in here cost 120 $ but this gay?s DP sold in 250 $.

Another example is stuart I, it is designed in 198? You can buy its kit and if you adjust it nice, you can reach at last a coin in 18 cm but my modified stuart I detect a coin in 28 cm. (but take 2 week)
In commercial ready detectors manufacturer try to final produces have maximum passable performance with minimum passable price but in a kit they usually try to final produces have easy as passable for assembling for user because of educational purpose then minimum passable price and at final acceptable performance.
If you do not have enough experience in electronic, especially in metal detectors do not waste your time and money for a kit Buy completed one.


Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76912.html#msg76912




« Last Edit: March 02, 2010, 04:14:57 am by mafarid »
Logged
Offline Hobbyist
Silver Member
*

Join Date: May, 2008
Thank you4

Activity
0%

Malaysia
Posts: 1084
Referrals: 0

4220.00 Gold
View Inventory

Awards
« Reply #236 on: March 02, 2010, 04:32:57 am »
Go Up Go Down

Dear Mafarid,

Thank you for your very detailed explanation and depth data. I now know what you mean: your advise is for me to buy a ready-made detector.That is what I had intended to do (and I still intend to buy a completed PI detector), and I saw the attractive low prices of those PI designs. I am not a mechanical engineer...so I do not make my own car. I am also not an electronics expert, so I know it will be a real waste of time and money to make my own detector because I don't know how to do so Smiley
 
My friend runs an electronics school and 2 tv/stereo repair shops. I have seen oscilloscopes and many other types of calibration/testing machines in his school, and I'll ask him if he's capable of making and tuning a PI detector for me. The cost of the parts is very cheap, and if he succeeds, the machine can be used as a spare. I will still buy a commercial ready-made PI detector for serious uses. Thank you again and good luck on your PI detector!

Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76913.html#msg76913




Logged

"Gold rides an iron horse." (Old prospector Homefire)

Offline mafarid
Pull Tab
*

Join Date: Dec, 2009
Thank you1

Activity
0%
Male
Iran, Islamic Republic of
Posts: 16
Referrals: 0

90.00 Gold
View Inventory

Awards

stuart I
« Reply #237 on: March 02, 2010, 09:40:13 am »
Go Up Go Down

Hi

My friends I captured this signals from pin 2 of LF357.those signal show that coil sense metal parts but in output of LF357 (pin 6), I could not find anything useful.
What is mean of these signals?
It is impassable that LF357 was ill because I changed all active components (transistor, IC and diode) of circuit.

Can anyone paste shape of DP?s LF357 output signal?

Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76953.html#msg76953



There are 2 attachment(s) in this post which you can not view or download

Please register for viewing them.

with metal.jpg
without metal.jpg


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 #238 on: March 02, 2010, 10:26:57 am »
Go Up Go Down

in my failed previous DP circuit, I find the LF357 little warm, are you find it warm, also?
if I could get the good result from the new circuit, I will post critical signals for all.

Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg76962.html#msg76962




Logged
Offline mafarid
Pull Tab
*

Join Date: Dec, 2009
Thank you1

Activity
0%
Male
Iran, Islamic Republic of
Posts: 16
Referrals: 0

90.00 Gold
View Inventory

Awards

stuart I
« Reply #239 on: March 03, 2010, 02:59:30 am »
Go Up Go Down

Yes, LF357 was warm a little! But why?  Shocked Shocked Shocked
I think warming of LF357 is not normal. Huh?
 I do not have another LF357 to replace, so is it passable for anyone who has ready DP test this problem?


Linkback:

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

http://www.thunting.com/smf/index.php/topic,2887.msg77125.html#msg77125




Logged
Print
Pages:  1 ... 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 ... 89   Go Up
Jump to:  

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