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felezjoo PI(the best pulse induction metal detector that I made until now)

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  • Originally posted by LUPENGR29` View Post
    Any ferrite would work? if it is ok I have many

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    • Originally posted by pigeon View Post
      You are funny.... anyone else who want realy help?

      What type of ferrite?

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      • Originally posted by LUPENGR29` View Post
        You are funny.... anyone else who want realy help?

        What type of ferrite?
        It doesn't matter what type of ferrite. It's simply a 10uH RF choke in series with the power line.

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        • Click image for larger version

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          Hi guys can you tell me if this ic is good for project i mean copy or original

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          • Originally posted by salim View Post
            [ATTACH]55024[/ATTACH]

            Hi guys can you tell me if this ic is good for project i mean copy or original

            Cannot tell just by looking at it, you will have to test it, too many fakes.

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            • Originally posted by 6666 View Post
              Cannot tell just by looking at it, you will have to test it, too many fakes.

              I agree, need to test.
              They do not look good. The Motorola logo seems a bit blurred which can be an indicator of a fake.
              Also, the surface on the chips looks rough.

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              • Good evening, I made the felezjoo pi it works normally but the 7812 burned but I did not have another 7812 and I installed the 7809 and the pulse works fine. Should I leave it or will it create a problem in the circuit?

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                • Originally posted by Omerta 1312 View Post
                  Good evening, I made the felezjoo pi it works normally but the 7812 burned but I did not have another 7812 and I installed the 7809 and the pulse works fine. Should I leave it or will it create a problem in the circuit?
                  Check the negative of the cepacitors and you will find out why it became burned :P .... normaly no so burned....

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                  • I want to buy this LF357 but it does not ship to Latin America, will there be a friend who can send it to me?Click image for larger version

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                    • my answer is to help those who are building! the integrated lf 357 is false in all countries. to adjust the circuit to simply be operational it is necessary to put a 5k potentiometer in place of the resistor

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                      • Originally posted by folharin View Post
                        my answer is to help those who are building! the integrated lf 357 is false in all countries. to adjust the circuit to simply be operational it is necessary to put a 5k potentiometer in place of the resistor
                        Which resistor?

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                        • [QUOTE = LUPENGR29`; 287988] ?Qu? resistencia? [/ QUOTE]
                          It refers to this.Click image for larger version

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                          • alternatively you can replace R10 with a potentiometer or trimmer

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                            • exactly..I got success in the detector by replacing this resistor mentioned r10 by a potentiometer!

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                              • Hello, we have encountered a problem, this device is not stable on soil, does anyone have a solution to this problem?

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