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Offline xavier
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« Reply #70 on: November 23, 2010, 03:17:40 am »
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Hi guys

Well I'm still having graphics problems with thunting and that makes this site a hole new ball game (not funny) Mudflap I saved the link to that calculator should come in quite handy.
GD I'm going to make a coil today see what this baby will do. Lets just hope that it will be all systems GO LOL

Regards Xavier

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So many questions so little time
Offline Mudflap
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« Reply #71 on: November 28, 2010, 11:42:08 am »
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"A 2" piece of ferrite rod with approx 40 turns of 22awg copper wire
Ideally the coil inductance should be approx 350uH, other values work but try not to go above 500uH."  per silverdog

I have 40 turns of #22 on a 10 mm diameter ferrite from an old am radio and only up to about 60uh. At this rate going to be way over 40 turns......

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Offline xavier
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« Reply #72 on: November 28, 2010, 02:16:31 pm »
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OK well did that wound wire on a ferrite rod till I had 350uH but it only picks up a coin at 1in  Angry could it be the ferrite rod that I'm using dimensions are L=100 mm D=6 mm.

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Offline seanengman
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« Reply #73 on: December 03, 2010, 07:11:45 am »
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Got the PCB kit a couple of days ago... I am stunned. I thought this was gonna be a simple, cheap PCB and this thing is top notch. Well worth every penny. This guy is legit and great to business with.

Cheers

Sean

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Offline xavier
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« Reply #74 on: December 03, 2010, 10:53:11 am »
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Just be sure to get the components in the right place and you should be good to detect with it in a few day Have fun mate.

Regards Xavier

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Offline nickel_n
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« Reply #75 on: December 06, 2010, 05:07:45 am »
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Gday every one
My surf pi pcb just arrived. Took 21 days for the good old snail mail. But its here!!!. Thank you silverdog.
I better get busy so the PI it can be ready for the Christmas holidays.
pls guys keep feeding info about it. It?s so handy.
Nickel_n

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« Reply #76 on: December 07, 2010, 06:27:35 pm »
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I think I'd like to try this one I pm'd you silverdog.

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« Reply #77 on: December 12, 2010, 05:37:44 pm »
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Quote:Posted by GoldDigger1950
Good question. It's been attached to a good number of posts in a variety of incarnations. Let me gather the most up to date info to zip into an archive and I'll upload it into the Downloads area. To keep you going for now, here is the latest and best schematic and the component list for the board you have in your hand.Be aware that there is some errata for you to deal with. Look up the pin data on the transistors to be sure you have them aligned right. Certain types have to be reversed on the board while others drop in as pictured.Also, not shown on the schematic are two jumpers that have to be installed. They are marked on the silk screen as white lines.Linkback:

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                  Attachments
             SurfPi_v_12.pdf (67.67 KB - downloaded 28 times.) SurfPi_v_12_component_list.txt (2.51 KB - downloaded 22 times.)


GD. Just a FYI >>
Found this component list and scheme varies a bit from the one Silverdog sends. Silverdog uses 10K pot for P2 and the one you posted shows 100K.


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Offline GoldDigger1950
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« Reply #78 on: December 13, 2010, 02:40:15 am »
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Quote:Posted by Mudflap
GD. Just a FYI >>
Found this component list and scheme varies a bit from the one Silverdog sends. Silverdog uses 10K pot for P2 and the one you posted shows 100K.


That's a significant difference. The parts list matches the schematic. It's hard to tell which is correct at this juncture. One of the pitfalls of building from scratch.

I'll look into it.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
Offline xavier
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« Reply #79 on: December 13, 2010, 10:19:19 am »
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And so will I. There is something that is wrong I'm only getting about 15cm in air for a pair of side cutters.(this cannot be)

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