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  • Thanks for Your reply dear Walkman

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    • Hi all friends
      There is schematic V3 of S.M.W with some changes compared to version 2 of this detector in this link (http://www.hobbielektronika.hu/forum...=198055‎), and a video with great performance on YouTube. Is there any PCB for this version of S.M.W?

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      • Click image for larger version

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        Red rectangles is different than version 2

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        • smw 3,0 pcb
          Attached Files

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          • Thanks Mr Walkman. Is there any components placement for this PCB?

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            • Hi friends
              I made ​​two circuits of the SMW v2 metal detector
              But I had some problems:Click image for larger version

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              1) In both circuits a low continuous sound is heard from the detector in all time
              2) In both circuits when I touch the coils or some potentiometer the detector makes noise like when an object detected
              Please help how can I solve this problems?Click image for larger version

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              • And second boardClick image for larger version

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                • Originally posted by salih View Post
                  in my SMW I have problem There is an inverse relationship between sensitivity and volume key . When the sound is low Detecting coin in the air 40cm . When the sound is high Detecting coin in the air 29cm. I use BC517 Instead of MPSA13. help.
                  MPSA13 Is stronger than BC517

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                  • smw 3 pcb shematic and all data
                    Attached Files

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                    • Originally posted by walkman View Post
                      smw 3 pcb shematic and all data
                      Thank you dear Walkman

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                      • These are my drawings SMW3
                        Attached Files

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                        • Hi walkman. This circuit needs adjustment with oscilloscope?

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                          • Why was was rotary switch S2 added - i.e. what is it supposed to be accomplishing?

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                            • It influences recovery speed, but in full honesty, the influence of such solutions is not big, so you can freely put only the largest capacitors instead.

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                              • Hi everyone

                                I make version 3 of S.M.W

                                Can i replaced LM2937ET-10 with Lm317 or 7805 or LD1117DT33TR ?

                                Please help me

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