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Offline ram
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« Reply #20 on: June 03, 2011, 10:36:51 pm »
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yup eugene 52, thanks,  how about the cat5 ethernet cable used for the search coil, you have some data for it? and the performance of cat5 for search coil?

i tried 1x1mtr coil using cat5 1turn but when i test the resisitance is to high. the cat5 have 4pairs of twisted cu wire each pair.

what's your idea to use the cat5.

ram,

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Offline dr.jare
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« Reply #21 on: June 04, 2011, 04:25:58 am »
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Quote:Posted by ram
bulgarian pi by sascho. 20x20cm metal at 1mtr air test coil 1x1 mtr=1mm 12turns.

with schematic and pcb.

ram,
   Hi ram. Thank-you for posting the PI schematics and PCB file but it has nothing to do with my issue. Well I know the all Sascho projects,except this last SBG-PI. The scheme you set does not contain crystal 32kHz.

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Offline WM6
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« Reply #22 on: June 05, 2011, 10:09:26 am »
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Quote:Posted by dr.jare
Hi fff. I have one question: that perhaps should not be a crystal of 32Mhz instead of 32kHz? Perhaps the mistake is on the scheme? Crystal of 32kHz can not find, other than small for installation in hour.


Hi dr Jare,
it is 32kHz, like in schematic, not MHz.
If you cannot find such Qartz, I am glad to sent you one - give me your post address at PM.

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Offline dr.jare
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« Reply #23 on: June 05, 2011, 10:58:56 am »
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Thanks WM6. I am going to put this topic on the Serbian forum (Hobi Detektori), for easier communication.

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Offline WM6
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« Reply #24 on: June 06, 2011, 03:44:30 am »
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Hi Sasho,

congratulation for new construction.

One question:

In schematic we can read of regulating delay from 150 to 33 microsecond.

It is not clear to me, how can we set such different delay and where in SBG-PI schematic?

Can you explain? Thank you!

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« Reply #25 on: June 06, 2011, 11:27:23 pm »
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 Delay 30-60 micro sec.-variant.Quartz -32 Khz .

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Offline genebads
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« Reply #26 on: June 07, 2011, 12:24:57 am »
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what a design...

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« Reply #27 on: June 07, 2011, 03:03:02 am »
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Quote:Posted by fff
Delay 30-60 micro sec.-variant. Quartz -> 32 Khz .


Thanks "fff" for tip on how to get other delay too. Nice solution.

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Offline dr.jare
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« Reply #28 on: June 07, 2011, 06:48:25 am »
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Quote:Posted by fff
Delay 30-60 micro sec.-variant.Quartz -32 Khz .
Hi fff, thanks for your reply.
A question for C3, C4 :
In schematic is Gnd and on PCB is -V ?
I think I'll option the discrimination performed using "delay".

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Offline fffTopic starter
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« Reply #29 on: June 07, 2011, 12:46:40 pm »
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C3 and the C4- correct connection

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