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Offline Eugene52Topic starter
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« Reply #290 on: March 30, 2010, 10:09:29 am »
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Quote:Posted by hesamavr
Dear Eugene52

Your uploaded PCB board has one mistake, I demonstrated it by the below photo. I think we can't find one metal detector circuit, without problem unfortunately. Angry




The problem was fixed a long time ago !!! Please look for the latest schematics by date !!!!
The newer members have missed a lot of information by not reading previous posts , especially end of last year !!!!
Regards.........Eugene

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Delta Sniffer xr71 single side pcb ready to build FINAL 11-19-09.zip

« Last Edit: December 31, 1969, 06:00:00 pm by Eugene52 » 		Logged
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Offline fataiat
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« Reply #291 on: March 30, 2010, 04:55:36 pm »
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thank you

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Offline hesamavr
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« Reply #292 on: March 31, 2010, 06:15:24 am »
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I check DP in two sections,

first with 2.6ohm,45cm diameter coil. it detected one 2cm coin at 20cm. its stability was medium.

second, 4.2ohm, 45cm coil. it's very poor in detecting and very bad stability.

I don't know this bad stability is because of the coil or anything else, when you make it silent, after one second, it makes sound again. you can't make it silent for long period.

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Offline BR*simonn
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« Reply #293 on: March 31, 2010, 09:56:10 am »
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Hello Eugene.
Are there other substitutes for the LF357 in Delta Pulse / Sniffer ?
Thank you.
Claudio

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Offline Eugene52Topic starter
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« Reply #294 on: March 31, 2010, 10:53:37 am »
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Quote:Posted by BR*simonn
Hello Eugene.
Are there other substitutes for the LF357 in Delta Pulse / Sniffer ?
Thank you.
Claudio


Hello .
Yes !!

See attachments:

Regards.........Eugene

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« Reply #295 on: March 31, 2010, 03:34:52 pm »
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Thank you again, Eugene.
Best regards.
Claudio

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« Reply #296 on: April 01, 2010, 02:44:18 am »
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Thank you very much eugene52

I want to ask you about the coil1 * 1 m

 Clapp

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Offline steaua581
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« Reply #297 on: April 01, 2010, 11:28:01 am »
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Hello Eugene and forum,
Here is what i read with osciloscope ...is freqvency allright what do you sugest...do i have anything wrong?
What do you think...

Regards
Marius

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Offline Eugene52Topic starter
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« Reply #298 on: April 01, 2010, 12:12:53 pm »
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Quote:Posted by steaua581
Hello Eugene and forum,
Here is what i read with osciloscope ...is freqvency allright what do you sugest...do i have anything wrong?
What do you think...

Regards
Marius


Hello . Check potentiometer P3[20k] and resistor R4[5.6k] going to pin 13 of LM556[D1,IC1] timer . 300 pps is to high , should be 100 to 120 pps .
Regards.............Eugene

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Offline steaua581
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« Reply #299 on: April 01, 2010, 12:38:49 pm »
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Thanx Eugene,
I think i have it at 100 PPS..... I am using this soft for first time im having trouble setting it right.Can you please point to me what im doing wrong?

Regards
Marius

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