TESORO GOLDEN SABRE

[Dennis the Mennis]

Hi DtM!

3. I would like to see some more graphs of your LF353 output at pin 1 (compared to TX signal on other trace) for different values of C9. What value of C9 makes the ringing completely disappear? Maybe go down to 50pf, 40pf, 30pf, etc.

Actually, it looked pretty good at 68pf from your graphs, I would choose that value to keep maybe. It would be interesting to see your sync pulse at max and min DISC pot setting with C9 = 68pf.

Cheers,

-SB

I've did a small test with different C9 values but is seems that within the range of 60 - 90 pF you the 'best' Disc signal/ shape output LM393 pin 1 ( varying of course from pcb to pcb ).


This a picture with 68pF for C9 : Output pin1 LF353 vs output pin1 LM393 DISC signal with Disc pot at minimum / 0% .
Still a little spike, only at the minimum of the disc potmeter



This 80 pF has also the same spike only at the minimum setting for the Disc pot
Only the complete signal at the output LF353 increases.




A 100 pF for C9 gives my pcb the best cards in terms of a Disc signal without any spikes over the complete range of the Disc potmeter ...



122 pF gives spikes again even at 50% of the Disc potmeter

0% :



50% :



and 168 pF : the ringing somewhat disappears



As said before : this part of the circuit is pretty forgiving and if someone has problems with the spikes a different value for C9 mightbe considered .


Kind regards ,

Dennis the Mennis

[Dennis the Mennis]

I also disc out iron in all disc pot settings.At min it makes cracks and chatters
I usually test with foil from this:http://www.balcan.net/files/images/orbit.jpg
I can disc out it at half of disc pot setting

When it is discriminated i get 30-35cm for my coins. I will try to find euro coin soon...

On equestion for you Dennis: How noch function is working? Can you disc pultabs and at same time detect Cu+Nickel alloy coins?

Hi Habitbraker ,

I think my Disc function is working finally, still experimenting with it to be sure ...

I haven't tried the notch function that much because I think it doesn't work at the moment.

I recently discovered some defective parts on my pcb causing a not working Disc function for a long so I didn't spend that much time on the Disc ...

Now I can Disc out a piece of chewing gum foil and still detect a coin at the same time.


kind regards ,

Dennis the Mennis

[08llyj]

bf 245c

THKS FOR ALL EDUARDO

[eduardo1979]

BF245C

http://cgi.ebay.es/20x-BF245C-SFET-N-Channel-J-FET-Depletion-BF245-C-/320689352109?pt=Bauteile&hash=item4aaa932dad

[eduardo1979]

Tgsl Edu

Look at that! The BF 245 no E, B, C. The pins are: G, S, D.

[08llyj]

bf 245 c

I MAKE MY TGSL EDUARDO1979 AND I DON T NO HOW PUT THE 2 BF 245 C ON THE PCB.
WHERE IS THE E-B-C
THANKS FOR ALL GUY

[satdaveuk]

Gimp image editor

Download the Gimp Image Editor (it's free) and import the PDF file. You can then flip the image either vertically or horizontally.

Many thanks its so easy to use, quite powerful considering its only small download and free.

Warm Regards

Dave

[Qiaozhi]

Can anyone here tell me how i can flip the board on the pdf format? because i dont know how to do it.
Or can someone post me a ordenary picture I can put onto office, because then its so easy.

Many thanks in advance

Dave

Download the Gimp Image Editor (it's free) and import the PDF file. You can then flip the image either vertically or horizontally.

[bernte_one]

Can anyone here tell me how i can flip the board on the pdf format? because i dont know how to do it.
Or can someone post me a ordenary picture I can put onto office, because then its so easy.

Many thanks in advance

Dave

install pdf creator
when printing choose instead of your standard printer pdf creator
the file goes redirected to pdf document instead of paper sheet from your printer
i put the pcb into word.doc they are easy to fit into right size so
but do it like you want

[satdaveuk]

pcb board

Can anyone here tell me how i can flip the board on the pdf format? because i dont know how to do it.
Or can someone post me a ordenary picture I can put onto office, because then its so easy.

Many thanks in advance

Dave

[habitbraker]

I also disc out iron in all disc pot settings.At min it makes cracks and chatters
I usually test with foil from this:http://www.balcan.net/files/images/orbit.jpg
I can disc out it at half of disc pot setting

When it is discriminated i get 30-35cm for my coins. I will try to find euro coin soon...

On equestion for you Dennis: How noch function is working? Can you disc pultabs and at same time detect Cu+Nickel alloy coins?

[Dennis the Mennis]

Hi Dtm:

I forgot you made TGS, not TGSL -- is that correct? Or do you have both?

For TGS, that changes my understanding of some of your issues. For example, it probably is a little more important to have the 100K DISC pot instead of 10K, because there is another 10K pot in parallel. Also, C9 probably not a problem because TX wave will be smooth and smaller voltage. Also, you would expect less air depth because smaller TX signal.

Next step is to get results of your DISC mode detection - what depth, what coins used? Also, which circuit (TGS or TGSL)?!

TGSL for dummies project is ambitious, and you end up teaching yourself how it all works! Some people may want permissions for exact design for example PCB layouts I would think. I hope someday I can make a significantly modified design and my own layout of some MD and publish a book/manual also. I use lulu.com for my publishing projects.

Cheers,

-SB

Hi ,

I made , or trying to make ... , the TGS .

I really don't know what to expect for DISC .

It seems to discriminate iron in all setting of the disc pot .

What can I use more for disc testing ?
A smallish piece of AL foil , US nickel ( seems similar as the inside of a 2euro coin ( have to dismantle a 2 euro coin ) ??
Any suggestions for the test and a what distances should it disc out ?

kind regards ,

Dennis the Mennis

[fmnotes]

Hello.
I request a question.
I have made tgsl 3.0 version.
detects 1 Euro in the 16 cm
it is well?
if exists problem,
say me what I correct.
I thank.

[simonbaker]

Tgsl complet.

Thanks eduardo.

(For some reason, the Window "unzipper" thinks the .lay file is password protected, but another unzipper worked fine.)

If anyone has complete schematic including changes, would be nice to have.

Regards,

-SB

[eduardo1979]

Tgsl Edu

Tgsl complet.