IDX-PRO+VDI

[Davor]

BTW, anyone interested in analogue "VDI" with dial instrument? A Toltec schematic gave me an idea. My reasoning is that it would use very little current and a dial is a dial regardless of sunlight.

How much current does the VDI use on average?

[dfbowers]

Strange.. For example here is some info about XLT concetric works at 6.5kHz too, and it is 180 degree(sorry it`s not in english) but just look at photos:http://taktykpulse.com.pl/misc/Modyf...0XLT%20cz1.pdf I have 180 and everything: BG,Discrimination works fine,maybe it is the same.. anyway could you show yours Rx oscillator circut? Is this circut will by ok?, what about corect values of all elments [ATTACH]22267[/ATTACH]

THe schematic you have attached should work just fine for testing resonance of the RX coil.tI double checked my phasing. I scoped the hot end of the Tx coil for Channel 1 and Pin 6 of U1 for Channel 2. Mine definitely looks like 90 degrees. Maybe someone else can offer an option as well?

Don

[dfbowers]

I used the basic oscillator section for the TGSL below, except I changed the capacitor values to determine resonant frequency of the RX coil.

[Orbit]

idx

[reiv]

Ok, thanks and what was yours values of C1 and C2 ? First You have to measure inductance and insert to this pattern?

[6666]

anyone interested in analogue "VDI"

What have you got in mind Davor ?

[Davor]

I'm thinking of a simple and frugal analogue divider (tangent of the target angle) and after some signal conditioning connect it to a dial instrument.
It would not make much sense if a digital VDI unit uses less than 10mA.

[Qiaozhi]

I'm thinking of a simple and frugal analogue divider (tangent of the target angle) and after some signal conditioning connect it to a dial instrument.
It would not make much sense if a digital VDI unit uses less than 10mA.

Are you planning something like this?

[kt315]

Are you planning something like this?

no. he is planning something like that

[Davor]

Are you planning something like this?

Yes. I've tried some UXO detectors in bright sunlight and learned that their leds and other indicators worth a squat when our local star is in zenith. True, a dial can be banged out of it's bearings, but it either works or it doesn't, and you can always tell.
The whole difference is in analogue vs digital division of the X and Y signal, and a whole bunch of milliamperes.

I stood aghast when I learned that Raspberry PI draws over 300mA at any given moment. That was only a moment after I learned that it is also crippled on I/O, and a few moments before I started comparing these basic parameters of other popular platforms with micros. Analogue rules!

[Leshka]

[IMG]<a href="http://www.imageup.ru/img216/1146225/2-tone.jpg.html" target="_blank"><img src="http://www.imageup.ru/img216/1146225/2-tone.jpg" border="0" alt="Хостинг картинок"></a>[/IMG]
Correctly or not. Please.: Помощь:

[Leshka]

[IMG]<a href="http://www.imageup.ru/img216/1146225/2-tone.jpg.html" target="_blank"><img src="http://www.imageup.ru/img216/1146225/2-tone.jpg" border="0" alt="Хостинг картинок"></a>[/IMG]

Help!

[Leshka]

[IMG]<a href="http://www.imageup.ru/img216/1146225/2-tone.jpg.html" target="_blank"><img src="http://www.imageup.ru/img216/thumb/2-tone1146225.jpg" border="0" alt="Хостинг картинок"></a>[/IMG]

[Qiaozhi]

[IMG]<a href="http://www.imageup.ru/img216/1146225/2-tone.jpg.html" target="_blank"><img src="http://www.imageup.ru/img216/thumb/2-tone1146225.jpg" border="0" alt="Хостинг картинок"></a>[/IMG]

Leshka,

This is not the way to attach images in the Geotech forum.
When making a new post, scroll down the page until you see "Manage Attachments". Then click on the button and use the dialog boxes to attach your images.

[Leshka]

Help.