Ferrous and no-ferrous

[6666]

next pictures

[6666]

As all the attachments have fallen off this thread I will try and attach the ones I have kept.

[bernte_one]

hello alber gold,

did you have news news on this project

circuit board, project package for download ....

regards

[Pasha]

Hi,

This is my new design for metal disc. for pi detectors.

http://www.youtube.com/watch?v=RSJ1H_bG-sA

Regards

[6666]

Hi alber_gold

Are there any updates or improvements to your project ?

[6666]

Thanks Alberto.

[alber_gold]

Alberto just want to check with you that the new hex needs 20 Mhz crystal ?

The new PIC took the new hex OK.
Thanks

Yes, the new .hex run at 20 Mhz.

[6666]

Alberto just want to check with you that the new hex needs 20 Mhz crystal ?

The new PIC took the new hex OK.
Thanks

[6666]

Ordered another PIC16F873 - 20 to try new software


From Alberto in post #41 and ADC input, AN5 does not exist. Connect to AN4/RA5 --> pin 7

[alber_gold]

Hi alber_gold

Thanks for the information on new design.

Could you please tell us the new coil information Ltx/Lrx and what value is C1, thanks
6666

Hello, happy 2014.


I have tried many different coils and I can not pinpoint any particular.
You can try different coils and study their behavior.
You can also use a single coil.
56 ohm resistor. protects the transistor.
You can change to increase reach but not exceed the maximum voltage of a transistor CE.
I put C1 for options in the output signal. Different ways with different values.
Typically work without any capacitor.

[6666]

Hi alber_gold

Thanks for the information on new design.

Could you please tell us the new coil information Ltx/Lrx and what value is C1, thanks
6666

[alber_gold]

Hello, I 'm happy for the PIC . :-)


If you are interested in further testing will be interesting this other code.
Change the scheme, but has some advantages.




- Did not use the NE555 .
- The PIC generates a signal with an initial period of 98 uS and a pulse width of 10 uS.
- With the " d " key pulse width is increased.
- With the "f " key pulse width decreases.
- The minimum pulse width is 1.8 uS.


We use the two bytes of ADC capture . ADRESL and ADRESH .
By PORTB only see ADRESL .


We debbug output console. I use Hyperterminal but there are many others.


It should be set as follows: 9600 8n1 Xon / Xoff


In RB 873 pin 7 is RX and RB pin , 6 is TX .
I use a USB to TTL converter like CP2102 USB port.
MAX232 , MAX233 , serial ports etc for COMxx also available.


We see this in the console : " xxx + ADC and ( zzz * 400ns ) uS " + CR
where :
- . Xxx = ADRESL in dec
- . Y = ADRESH in dec
- . Zzz = VALOR_A in dec


Like this :








To upload VALOR_A press "a" key
To download VALOR_A keypress " s "


The minimum tripping time is 600ns ADC and the maximum time is 102 uS.
Keep in mind that the time of each catch is 19.2 uS with a 20 Mhz crystal .


With this code I learned a lot . I hope you serve .

[6666]

Pic took the hex ok

[6666]

Pic has arrived.

[alber_gold]

I agree with Joop
If in a really junky location Induction balance is the way to go, However you will still be digging junk but not quite so much unless your like me because I tend to dig almost everything hence the bad back

Joob right.
I'll ride one TGSL in a few weeks. Today I continue to study its performance.
I have not ridden before because I'm a bit poor ($ $ $ $ $ $ $).
When finished with the TGSL want TINKERER-model mount.
TINKERER seems like a great idea. It's a different concept.
And when finished with the TINKERER want to ride someone else.
Gradually I want to try several models.
Meanwhile I will continue with my tests. All my life I'll be doing tests.
Thanks Satdaveuk. My weary bones are grateful. :-)
Regards.