Voodoo Main Discussion

[SilverSurfer17]

Yeah i checked the numbers on the package i didn't bust out a magnifying glass and look at the chip but from now on i sure will what a head ache thanks

[SilverSurfer17]

From what I've read on google most of the letters are company initials i think it said that come after the number and that TC is before it and i know the number is suppose to be correct and thats not so thats why im making sure before i order it

[Matt_Rowe]

Its says its a bilateral switch but its the wrong number and not what i ordered i started looking over my board with a magnifying glass after someone above mentioned checking parts before you install them and found it and the one thing i know with this already is you need all the right chips glad i installed all sockets

that was me that suggested checking parts, after surfdetector told me i should check all parts and numbers before even starting assembly and
then put the parts as to what they are designed to go in a envelope so we build these in steps, per say #1 is power, #2 is transmit, ect, and then test each step.

[SilverSurfer17]

Its says its a bilateral switch but its the wrong number and not what i ordered i started looking over my board with a magnifying glass after someone above mentioned checking parts before you install them and found it and the one thing i know with this already is you need all the right chips glad i installed all sockets

[Matt_Rowe]

Im pretty sure i found the problem 4016BE bilateral switch not 4066BP !

looking online i found a 4016 is analog only, and 4066 is bilateral, analog and digital
but im new also, thats why im here trying to learn about what numbers and letters mean so i dont order wrong parts

[SilverSurfer17]

Does the TC in TC4066BP make a difference ? It says quad

[SilverSurfer17]

Im pretty sure i found the problem 4016BE bilateral switch not 4066BP !

[SilverSurfer17]

I made a concentric 8 inch coil and im just using the outside coil on tx to get pi working with no capacitor and the resistor jig but my output signal looks backward before a coil is connected wrong when connected and stage 1 tp3 looks really off no where near tp5 does

[KingJL]

...
I'm considering one of these CS5361 as my ADC, 24bit, 114dB range and X2, x4, x8 switched gains for a total Dynamic range of 123dB. Should be interesting...

Sean, I don't know if you plan to use both channels... but if only need one output, you can add ch1 to ch2(result 25 bits) and achieve 3db improvement in SNR (you can always right shift to get back to your 24 bits if desired). This method is built in to newer generation Burr-Brown audio ADC's.

[MartyJ1963]

Hi Alec, Hi Matt,,,I thought I'd have a look with Sean mentioning this build video but I can't find anything new only yours Alec. Strange another build was mentioned but after an hour of searching I drew a blank. Regards, Marty

[Matt_Rowe]

@Sean_Goddard,,,Can't seem to find Goldfinders video on you tube,,any chance you could post a link please? Thanks, Regards, Marty.

the only person i know that has any build videos on youtube is surfdetector

[Matt_Rowe]

The first problem i had was i was using a ac to dc power supply hooked stuff up to 12 volts for 30 years never had a problem using any broadcasting equipment but not with voodoo but when i hooked up the ground i shorted it out fixed that the sine waves don't match the book mostly after i hook up a tx loop but it also looks mirrored or backwards before a coil is connected and i know its something stupid because its recognizing metal as i run it past the coil so i know im not far off

what coil are you using and are you hooking up tx and rx, or are you just using a mono coil

[SilverSurfer17]

The first problem i had was i was using a ac to dc power supply hooked stuff up to 12 volts for 30 years never had a problem using any broadcasting equipment but not with voodoo but when i hooked up the ground i shorted it out fixed that the sine waves don't match the book mostly after i hook up a tx loop but it also looks mirrored or backwards before a coil is connected and i know its something stupid because its recognizing metal as i run it past the coil so i know im not far off

[surfdetector]

@Sean_Goddard,,,Can't seem to find Goldfinders video on you tube,,any chance you could post a link please? Thanks, Regards, Marty.

As far as I know, Frederick Barnes (AKA "Goldfinder") has no videos on the making of the Voodoo.

[MartyJ1963]

@Sean_Goddard,,,Can't seem to find Goldfinders video on you tube,,any chance you could post a link please? Thanks, Regards, Marty.