Voodoo Main Discussion

[6666]

@6666,,Hope it arrives for you soon. Did Trev contact you about obtaining a board from you? Can't wait tll the thread starts getting 'Busy' with building this project! Regards, Marty

Hi Marty, yes Trev has his pcb and book

[Qiaozhi]

I don't know if I'm making a concentric, or an omega or a super D (mini) ... voila .. the concentrics are not easy to humbucking coil.

As you see from Chapter 6, all the coils were of the concentric type except one. The exception was the Fisher F75 DD coil, which had a slight disadvantage when the detector was switched into PI mode.

[Qiaozhi]

I'm just having a bit of trouble reading the schematics in the book with them being so small but I'm also a little confused as to which terminals are '+' or '-' on some of the 'PL' (2-Pin) connectors and the speaker connector. Really don't want to start building till I know what's what. @Qiaozhi,,Could you look at the pic I posted and tell me which is which please as I'm a littl confused? Both diagrams say 'Rear view'. Regards, Marty.

Both diagrams are the "rear view". The top one is for the socket, and the bottom one is for the plug.

[MartyJ1963]

@Lamoiz,,,I don't think the Voodoo coil has a ' Bucking' coil. I believe it just consists of an outer loop, the TX, and the inner loop, which is just the RX. The TX Coil has a parallel Damping resistor and the RX Coil has a parallel Capacitor. Someone can correct me if I'm wrong or mistaken,,,Regards, Marty.

[MartyJ1963]

@6666,,Hope it arrives for you soon. Did Trev contact you about obtaining a board from you? Can't wait tll the thread starts getting 'Busy' with building this project! Regards, Marty

[MartyJ1963]

I'm just having a bit of trouble reading the schematics in the book with them being so small but I'm also a little confused as to which terminals are '+' or '-' on some of the 'PL' (2-Pin) connectors and the speaker connector. Really don't want to start building till I know what's what. @Qiaozhi,,Could you look at the pic I posted and tell me which is which please as I'm a littl confused? Both diagrams say 'Rear view'. Regards, Marty.

[6666]

Hi all,,,Has anyone started to build the Voodoo yet? Thanks, Marty.

Still waiting for book ordered Oct 14

[lamoiz]

I don't know if I'm making a concentric, or an omega or a super D (mini) ... voila .. the concentrics are not easy to humbucking coil.

[lamoiz]

Hi all,,,Has anyone started to build the Voodoo yet? Thanks, Marty.

I'm just starting ... especially the coil. but I have not had the answers to my questions. I'm also waiting for some components. I programmed the microcontroller

[MartyJ1963]

Hi all,,,Has anyone started to build the Voodoo yet? Thanks, Marty.

[lamoiz]

question for everyone, do you think it's a good idea to make an omega? even if it's just for testing? or is it certain that I will fail ..? your opinions please

[lamoiz]

It was handmade, and the results were disappointing. Perhaps I did a bad job with the construction.

no i don't think you made a bad construction, you are a specialist. but what can explain that an omega works badly while the concentric one works well .. it's almost the same thing isn't it?

[MartyJ1963]

Thank you Qiaozhi,,,Much appreciated. Regards, Marty

[Qiaozhi]

Could you let us know what the pinout numbering of 'PL9' is please on the Silk?

PL9 is the 5-pin ICSP connector. Pin #1 is on the right-hand side.

The pin names are:
1 = VPP (Programming voltage - connects to pin #1 of the PIC U2)
2 = VDD (Connects to 0V)
3 = GND (Connects to -5V)
4 = PGD (Program Data pin #40 U2)
5 = PGC (Program Control pin #39 U2)

[Qiaozhi]

you mean it's not good? but was it a commercial coil or a handmade one?

It was handmade, and the results were disappointing. Perhaps I did a bad job with the construction.