Voodoo Main Discussion

[Qiaozhi]

Getting all the bits together On page 40 of the book there is a pix of the display with buttons a housing on a goose neck were can buy this or is there a STL file to print it up?

The display housing was from a White's MXT, but there is a 3D printed panel below the display to hold the buttons.
I've attached the FreeCAD design file, the STL file, plus the gcode and gco files for the switch panel.
However, I suspect you're really asking for the STL file for the complete housing. That (of course) does not exist, as it's a housing from White's.


Switch_Panel.zip

[Gunghouk]

Hi all, as mentioned in a previous post here's an updated software for the Voodoo should anyone be curious. Details are in the previous post. I've included some scope screenshot showing pulse and hybrid modes.

Yellow trace is Tx pulse at the junction of the anode of the diode and 470 ohm dummy load resistor.

Cyan trace is the main sample pulse at TP10.

Magenta is the EFE sample pulse at TP6.

Blue is the Disc sample pulse at TP11.

I've also included a thermal image of the board with dummy load. No surprises that the 75L09 regulator is getting pretty hot with almost 100mA total current draw from my PSU.

You can see the alternate disc pulses appearing in hybrid mode from the scope pics.

[Qiaozhi]

Looks good.

[Gunghouk]

Thanks George, I'm really pleased with the resultant super stable pulse trains and faster loop time in the software. Hopefully someone with a working detector can give some feedback on the performance vs 2.02. Sampling should be super smooth too.

[phred01]

Hi all, as mentioned in a previous post here's an updated software for the Voodoo should anyone be curious. Details are in the previous post. I've included some scope screenshot showing pulse and hybrid modes.

Yellow trace is Tx pulse at the junction of the anode of the diode and 470 ohm dummy load resistor.

Cyan trace is the main sample pulse at TP10.

Magenta is the EFE sample pulse at TP6.

Blue is the Disc sample pulse at TP11.

I've also included a thermal image of the board with dummy load. No surprises that the 75L09 regulator is getting pretty hot with almost 100mA total current draw from my PSU.

You can see the alternate disc pulses appearing in hybrid mode from the scope pics.

Since I am just starting out haven't organized a compiler yet any change for a copy of the hex file please

[Qiaozhi]

Since I am just starting out haven't organized a compiler yet any change for a copy of the hex file please

I think the hex file in the Voodoo.XC3.00.X.zip under dist/default/production.

[phred01]

Found some reject metal boxes that require the board to be a little wider and slightly shorter has anyone got a pcb file from there gerber? Secondly to drive the lcd via 16 pin ribbon is a nightmare It would be more logical to use IIC/I2C/TWI/SPI as in the Arduino Has anyone done software update to do this?

[GeoMax]

Hi Phred01,

to make a PCB wider is no problem... You can make it maybe 1 meter wider without problems. But to make it smaller it might be a problem. Maybe to make it 2..3 mm smaller it is possible. But not really much more. To get the PCB size you want you need probably completly redesign the whole PCB new.

[Qiaozhi]

Found some reject metal boxes that require the board to be a little wider and slightly shorter has anyone got a pcb file from there gerber? Secondly to drive the lcd via 16 pin ribbon is a nightmare It would be more logical to use IIC/I2C/TWI/SPI as in the Arduino Has anyone done software update to do this?

It would be less hassle to purchase an enclosure of the correct size.
Driving the LCD with a parallel interface provides the fastest connection. Using one of the serial interfaces may be too slow, and would also require a different LCD.

[Levin]

Hello
I want to build a voodo metall detector, but I can´t find the gerber file. Where is it? please help me.
thanks for answers

[Qiaozhi]

Hello
I want to build a voodo metall detector, but I can´t find the gerber file. Where is it? please help me.
thanks for answers

The Gerber files are here -> The Voodoo Project - Published October 2020

It's located under this link -> https://www.geotech1.com/forums/foru...and-literature

[Levin]

oh thank you so much

[Levin]

Hello I have two questions about building a voodo detector
FQT7N10 mosfets (Q11, Q13) arent availible good, with which popular mosfet i can replace it ? whats the name from the 5 pin connector that is used in voodo and commercial coils
thanks for answers
LG Levin

[Qiaozhi]

Hello I have two questions about building a voodo detector
FQT7N10 mosfets (Q11, Q13) arent availible good, with which popular mosfet i can replace it ? whats the name from the 5 pin connector that is used in voodo and commercial coils
thanks for answers
LG Levin

The two MOSFETs are there to prevent damage from connecting the battery pack the wrong round. If you're careful with the battery connections you can simply short out this section in the design by connecting the drain of Q13 to the drain of Q11.

The 5-pin connector is a 16mm aviation connector. Here's an example on Amazon -> https://www.amazon.co.uk/Aiqeer-Avia...ps%2C66&sr=8-3

[Levin]

thank you