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Post by hades72 on Jan 3, 2017 15:27:36 GMT -8
hi to all members im new here i find how to make pin pointer in this link : chemelec.com/Projects/Metal-Pin-3/Pin-3.htmI tried to make one and finally here is the result    It lacks a little precision because I was obliged to replace some pieces big thanks Gary farouk from Algeria |
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Post by Gary Lecomte on Jan 4, 2017 6:37:41 GMT -8
I Can't see What your Distance Marking Are?
But you should be able to get More Distance on that Coin.
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Post by hades72 on Jan 4, 2017 15:59:10 GMT -8
hi  he can detect this coin max at 2 or 3 cm (0.8 or 1.2 inches) i use 10k pot (coarse)  and 250 k i used 500 ohms  and transistor i use c1815GR greeting |
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Post by Gary Lecomte on Jan 5, 2017 9:18:54 GMT -8
The c1815 is OK for replacing the 2N3904.
I will work, But it not a good replacement for the 2N5088.
That 10K Trimpot is OK for Coarse Tuning, But you should also have a 250 or 500 Ohm one for Finer Tuning.
Especially for detecting Tiny Objects.
Take Care....Gary
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Post by hades72 on Jan 6, 2017 1:32:32 GMT -8
thanks Gary
I will try to find the pieces who is missing
greeting
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Post by Hal on Dec 28, 2018 14:28:27 GMT -8
Just found this site. The pin point probe sounds pretty interesting to build.
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hal
New Member
Gold prospector since 1960 in Alaska and California.
Posts: 1
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Post by hal on Dec 29, 2018 6:06:15 GMT -8
I am building the Pin Pointer and asked Gary for what type of IC555 he uses. This might help someone else with the same question. Gary's reply was, "MC555, Ua555, Ca555 or Many Others in an 8 Pin Dip Package.
It is Probably the Most Common Part in the World."
Thank you, Gary, for your fast reply to my question and for your selfless sharing of your knowledge!
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Post by lamazoid on Jan 3, 2019 8:55:41 GMT -8
I have built Gary's pinpointer with SMD parts. you can read about it here: chemelec.proboards.com/thread/357/pin-pointer-2014i say, the critical thing about this project is the analog part. i have used BC847 instead of specified ones, and that resulted in very "narrow" tuning , with almost no gap between self-oscillation and high-sensitivity detection. |
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Post by Bones on Aug 6, 2019 15:38:25 GMT -8
Very cool project guys.
Long time guys. I've been on the sidelines for a while due to family obligations. I've got a bit of time for my hobbies lately.
I hope everyone is doing well.
I'm sad to see your site is going down Garry.
I was wondering if lamazoid had any of his old plans from his old websites?
Getting back into winding coils and i never did complete the T@$ER project or the updated smd version with the rm6 core
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