Surf PI Pro

[Mohamed Ghitas]

what a bad luck i don't have oscilloscope

and i checked the circuit more than one time and there is no short anywere

by the time i think i will made new one

thanks for replay

[Jons]

Read through all the pages of this thread first. It might take you a while but it's highly recommended. There are simply too many different potential errors, and false diagnoses. As far as I remember - take care of proper IC's (prefixes and suffixes do matter); transistor pinouts may differ depending on type you have; be sure you have connected the coil; all the way to checking for eventual overdone etching, or poorly cleaned (isopropanol) and dried PCB before use.

I wish you good luck acting Sherlock. My Surf PI worked flawlessly from the very beginning. And it's probably due to thorough preparation too.

[porkluvr]

don't worry bro iam in the 4th class of engineering and before i do that i measured the area polarity already and i found that its safe to do that
and when i inverse it nothing happens
iam still a life
and the required cap is 1u not 1000u which means 1000 nf and thats easy to find everywhere i got it from old power supply

You were talking about C7, did you not mean this C7?

It looks like a 1000uF/25V electrolytic, to me, but then I never stuck it out and stayed in engineering school for four years... so what would I know?

edit: Sorry if my tone sounds condescending or even insulting, but you were describing behavior that I thought not just unwise but also unsafe. It would have been irresponsible for me not to call your attention to the danger.

I have had an electrolytic explode and hit me in the face, missing my left eye by about 5cm. A reversed electrolytic is not a joke.

[Qiaozhi]

what a bad luck i don't have oscilloscope

and i checked the circuit more than one time and there is no short anywere

by the time i think i will made new one

thanks for replay

I would highly recommend getting access to an oscilloscope, otherwise you'll literally be probing in the dark.

[porkluvr]

Here is the Surf PI Pro schematic that Carl posted earlier (reduced to 50% and converted to pdf). I would like to call attention to note #3 (bottom right, next to the title block):

"CAPACITOR VALUES ARE IN MICROFARADS"
(that would make C7 to be 1000uF)

I hope we're talking about the same C7.

[Mohamed Ghitas]

Read through all the pages of this thread first. It might take you a while but it's highly recommended. There are simply too many different potential errors, and false diagnoses. As far as I remember - take care of proper IC's (prefixes and suffixes do matter); transistor pinouts may differ depending on type you have; be sure you have connected the coil; all the way to checking for eventual overdone etching, or poorly cleaned (isopropanol) and dried PCB before use.

I wish you good luck acting Sherlock. My Surf PI worked flawlessly from the very beginning. And it's probably due to thorough preparation too.

i did check the circuit more than one time and iam sure that there is no short circuit anywhere by the time iam going to make another PCB

You were talking about C7, did you not mean this C7?

It looks like a 1000uF/25V electrolytic, to me, but then I never stuck it out and stayed in engineering school for four years... so what would I know?

edit: Sorry if my tone sounds condescending or even insulting, but you were describing behavior that I thought not just unwise but also unsafe. It would have been irresponsible for me not to call your attention to the danger.

I have had an electrolytic explode and hit me in the face, missing my left eye by about 5cm. A reversed electrolytic is not a joke.

OMG and what happens to your face ?? is it okay ??
iam understanding that you`r talking about my safety i would do the same if i were you
thanks

I would highly recommend getting access to an oscilloscope, otherwise you'll literally be probing in the dark.

for sorry i dont have oscilloscope so by the time iam going to make another PCB and try

Here is the Surf PI Pro schematic that Carl posted earlier (reduced to 50% and converted to pdf). I would like to call attention to note #3 (bottom right, next to the title block):

"CAPACITOR VALUES ARE IN MICROFARADS"
(that would make C7 to be 1000uF)

I hope we're talking about the same C7.

no bro this is old schematic here is the new one

[Mohamed Ghitas]

please someone confirm me this image to be right
does anyone worked with this !!!

[chemelec]

Can't say for sure if your Image is Correct, But that C7 on your schematic is Basically Correct.
In the ORIGIONAL Surf Schematic Posted by Carl, it shows it a 1uF Electrolytic.


Problem is: There are NOW so Many PCB Variations and Different Schematics for the Surf, It is difficult to know Which Schematic belongs to Which PCB?

[Mohamed Ghitas]

Can't say for sure if your Image is Correct, But that C7 on your schematic is Basically Correct.
In the ORIGIONAL Surf Schematic Posted by Carl, it shows it a 1uF Electrolytic.


Problem is: There are NOW so Many PCB Variations and Different Schematics for the Surf, It is difficult to know Which Schematic belongs to Which PCB?

ummm that's big problem but is this PCB works fine ??

[mickstv]

Might be time to try and find someone who has an oscilloscope that you can borrow, or search for a cheap second hand one to buy.

[Mohamed Ghitas]

i made another one and it worked with coil 5.5 cm diameter ,0.4 ,32 turn "for testing" and it can detect medium object at about 2 cm

now i made another coil 22.5 cm diameter ,0.4 , 25 turn but detects nothing none !!

what is the problem ??

i think its heavy no. turns i will reduce it and try

[Mohamed Ghitas]

i reduced the no. of turns to 15 turn but still nothing

seems that the luck stops in my way

[Mohamed Ghitas]

pleas if any one has made this detector before please tell me that

measure Pin 6 in 5534 when there is no any metals around and when you put medium object on the coil with almost no distance

when i touch the sense pot it gives beeb and lol the sensitivity of sens pot is higher than the coil it starts to beeb with my hands at about 10cm away and the max i get with coil was 5 cm away detect

[Jose]

pleas if any one has made this detector before please tell me that

measure Pin 6 in 5534 when there is no any metals around and when you put medium object on the coil with almost no distance

when i touch the sense pot it gives beeb and lol the sensitivity of sens pot is higher than the coil it starts to beeb with my hands at about 10cm away and the max i get with coil was 5 cm away detect

See my post number 330 on page 14, maybe I can help.
Jose

[Mohamed Ghitas]

what coincidence i was doing that while you were typing this comment and you are so right it gives positive the detecting range increased to 5cm medium object with coil 55mm ,0.4 , 29 turn with delay max to right and tresh max to right and sense at middle

when i replaced it with coil 22cm ,0.4 , 15 turn it gives no any response with any position