Voodoo Main Discussion

[MartyJ1963]

Thanks George. I don't know if the LCD's I have from a previous project have their own backlight but what I wanted to do was contain all the LCD wires and the Menu Button wires inside one cable so I may buy a 1 metre strip of 26 way ribbon cable and place a 24 way plug socket on the front of the Voodoo enclosure then I'm hoping I can 'Roll' the ribbon circular, like a tube, so it can travel up through my handle to the LCD Enclosure,,,I have a few ideas to try. Thanks again. Regards, Marty.

[MartyJ1963]

Hiya George. Could you give us a little more insight into the 'Jumper pin' settings please and how to set them up and the other settings they may be used for ? Thanks, Regards, Marty.

[6666]

Hi Marty,
[ATTACH]53681[/ATTACH]

this is the first one Ive built, in the picture everything is over wrapped a few turns.
Final #s are 30 awg 40/46 wire 27 turns 4" I.D
Tx 385uh Rx 2.04nH. 30 awg magnet wire. 8" I.D
Bucking coil ended up 6and about 34 turns with a final null at 0 to 800uV.

One down .

Hi GD, is this basicly how you wound it ?

[Qiaozhi]

Hiya George. Could you give us a little more insight into the 'Jumper pin' settings please and how to set them up and the other settings they may be used for ? Thanks, Regards, Marty.

Jumpers J1-J3 are there for future experimentation. They are unused in the current software version.
If you're referring to the polarity jumpers PL7 & PL8, their use is explained on page 19.

[MartyJ1963]

Thanks George. The first coil I'm building is based on the 'Small' coil in the book wth the same Inductances. Would I use these same jumper settings on PL7 and PL8 as the Troy coil please? Having trouble understanding this 'Inverting' and 'Non-inverting' term,,,still learning,,Lol. Thanks, Regards, Marty.

[lamoiz]

update on your achievements, where are you?
I weld the components that arrive at the units in my postal mailbox ... and you?

[MartyJ1963]

Hiya Lamoiz, I won't be starting just yet. I only recieved my 79L05's and PIC IC Sockets today. I'm planning to build in stages and take my time as I want to make a record of my build so I will be taking my first photos and notes tonight. Tomorrow I will make a start by installing the IC Sockets first then building the Power supply. Are you building yours in steps? I wouldn't just install your components as they arrive or you may run into problems. As George said, You should build the Power supply first, then the Transmitter circuit then the LCD circuit so you are able to check your voltages before you move on. I hope you have a successful build Lamoiz. Regards, Marty.

[6666]

My book has arrived only took a month, was printed and shipped from USA, boo to amazon Australia.
but hit a blocker , still waiting for parts and missus is in hospital after mild heart attack so that will be a distraction for a while

[MartyJ1963]

@6666,,,Sorry to hear the bad news about your wife. I hope she recovers quickly and is ok. Regards, Marty.

[MartyJ1963]

Hi All,,,I took a couple of pics tonight. V1: Components. V2: All IC Sockets installed, checked for bridges and de-fluxed/cleaned. Ready, and looking forward to starting 'Step 1' tomorrow which will be installing the 'Power supply'. Regards, Marty.

[lamoiz]

Hiya Lamoiz, I won't be starting just yet. I only recieved my 79L05's and PIC IC Sockets today. I'm planning to build in stages and take my time as I want to make a record of my build so I will be taking my first photos and notes tonight. Tomorrow I will make a start by installing the IC Sockets first then building the Power supply. Are you building yours in steps? I wouldn't just install your components as they arrive or you may run into problems. As George said, You should build the Power supply first, then the Transmitter circuit then the LCD circuit so you are able to check your voltages before you move on. I hope you have a successful build Lamoiz. Regards, Marty.

no I have all the components, and I'm going to do everything at once .. this evening I soldered all the resistors .. tomorrow after ...

[lamoiz]

the circuit is well done !!! I trust ! and I'm not at my beginnings ..

[6666]

@6666,,,Sorry to hear the bad news about your wife. I hope she recovers quickly and is ok. Regards, Marty.

For those making this project, just be carefull when installing the crystal, dont push the case down hard against the pcb, leave a small gap between the case and pcb
the solder from the hole can protrude slightly high from the hole on a commercially made pcb, if you push down too hard the metal case can short the crystal legs.
Just something to watch out for.

Thanks Marty, this is her 2nd attack so not a good sign.

[lamoiz]

My book has arrived only took a month, was printed and shipped from USA, boo to amazon Australia.
but hit a blocker , still waiting for parts and missus is in hospital after mild heart attack so that will be a distraction for a while

take care of yourself, health is important.

[Qiaozhi]

Thanks George. The first coil I'm building is based on the 'Small' coil in the book wth the same Inductances. Would I use these same jumper settings on PL7 and PL8 as the Troy coil please? Having trouble understanding this 'Inverting' and 'Non-inverting' term,,,still learning,,Lol. Thanks, Regards, Marty.

Yes, use the Troy coil jumper settings. The PI and DISC channels must have the same polarity output. If not, then you may have to flip the coil connections on the inner loop, and/or adjust the DISC sample delay. Since you're building your own coil, you will have to adjust the delay to get the correct settings.

PL7 & PL8 are only there for experimental purposes. If you change them from the Troy settings you'll need to change the source code to invert the channel outputs.