IDX-PRO+VDI

[ampirate]

Have not tried since I got back from Europe this summer (had to dissassemble it before I left there - to skip customs worries).
I had built it in europe this past year.

Trying to reassemble it.
Not much spare time.
No BUZZ yet.

[golfnut]

put it back on and have a look

[ampirate]

My guess is that this Buzzer was also feeding back and creating the VDI noise ...

[ampirate]

okay !
Finally realized what was causing the random chirping in my Metal Detector;
- I used an Automated Buzzer instead of a Piezo.
So any strong DC would create a Buzz, not an Oscillation.
Stupid mistake.
Fixed.

[Koala]

I get better results with epoxy. Can take several days to fully harden this cold weather so once semi cured I but it in the oven at 50C goes rock hard.

Polyester also works and is cheaper but not as hard and I find the null alters as it cures

Both make usable coils.

[golfnut]

polyester resin is very hard, fast and cheap. Often used on glass fibre

eg

http://www.halfords.com/motoring/paints-body-repairs/car-body-fillers/davids-fastglas-resin-250ml

fill in stages, as volume cure gets too hot

[jlsilicon]

Well, I tried using Polyurethane instead of Epoxy for the Coil.
But, its flexible like stiff rubber - like tire rubber.

So, I would not suggest using Polyurethane as a solution for the Coil.

To fix this, I will am going back over it with Epoxy to solidify it.

[jlsilicon]

Yes,
thanks.

[Gwil]

Hi jlsilicon

"Metallised" and "Polypropylene" refer to two different aspects of capacitor construction. A capacitor consists internally of two conducting layers separated by a dielectric (insulating) layer. The dielectric layer can be a plastic such as polyester, polystyrene, or polypropylene, or any one of a number of other materials such as ceramic or mica. In capacitors using plastic film as the dielectric the conducting layers can be either metal foil or a thin layer of metal deposited directly onto the film, in a process known as metallisation. There are no hard and fast rules, although usually polyester capacitors are metallised and polystyrene use foil. A capacitor simply described as "metallised" will almost certainly be polyester. Polypropylene types can be metallised or foil - in low power/low voltage situations such as the guts of a metal detector, either is OK. Polypropylene caps have somewhat superior properties to polyester so can be used without a problem, assuming they physically fit on the pcb OK. (Wikipedia has entries on capacitors in general and film caps in particular.)

Hope this helps.

Gwil

[calebsone]

Holyuser thank you very much I just don't yet know much about the whole programming process but I am learning and I just wanted to not mess this up thanks again very much. when I have stuff ready I will show pictures.

[jlsilicon]

I noticed that SilverDog uses METALIZED Caps for his IDX PRO Kit.

Can these Caps be replaced by POLYPROPYLENE Caps without quality loss ?

[holyuser]

All fuse settings are included in .hex file.
Oscillator mode is INTIO2 (PIC16F88 ) or INTOSCIO (PIC16F690).
Reset is internally tied to Vdd, reset pin is an input.
The watch dog timer and brown out both are off.

[calebsone]

its ok about the vdi i just want it to be complete when finished. anyone who did finish the vdi what setting for the oscillator 4 , 8 , or 10 mhz is the reset used as a reset and should the watch dog timer and brown out both be off?

[golfnut]

I have a deus and I dont use the vdi on it.

I dont trust them, making a descision to not dig a specific number is not always correct

[Koala]

hey i am getting ready to start this project just needed some info has any thing changed from the posted info on page 7 post 316 its a file that has the hex for the vdi and the lays. if anyone knows of anything major can you let me know. and the two tone mod is that working and good to go? thanks in advance.

Can't help you as I did not build the two tone or VDI

Detector is very usable without either. The quality of the beep and loudness of the beep gives quite a lot of feed back on what's under the ground and how deep it is with out building the VDI and/or two tone.

Personally if it beeps I dig. Don't use much disc so large iron sometimes breaks through especially if it's ring shaped.


Would like to here from anyone who built the VDI as to whether it was worth the effort