VDI-RODERICO

[roderico]

I have not tested it yet, I just ordered the programmer and the details, made the wiring layout. I'll do it on 12F683 But first I'll check on the breadboard)) And you will overwrite the new firmware with small delays. Thank you.

I had a look to the code and removed the longer delays, now it works much better, however I need to do a few more tests. In order to remove those delays I had to add a resistor so the pcb layout needs to be changed. I'll also try to backport the code to the LCD version and then I would post them here...

[Artyom]

Good morning Artyom, some delays can be removed and/or optimized for quicker response, did you actually test the vdi with 2 leds? regards

I have not tested it yet, I just ordered the programmer and the details, made the wiring layout. I'll do it on 12F683 But first I'll check on the breadboard)) And you will overwrite the new firmware with small delays. Thank you.

[roderico]

Good morning, Roderico. I think that there is no need to delay the glow, there should be a quick response. Held over the target, the LED blinked and went out. This is necessary in order to quickly identify several goals lying next to each other. And if there is a delay, the goals are determined as one or incorrect. Best regards, Artyom.

Good morning Artyom, some delays can be removed and/or optimized for quicker response, did you actually test the vdi with 2 leds? regards

[Artyom]

VDI numbers depends on the size, thickness, etc of the target, just put two or three similar coins together to see it. So it you have a thin coin it could be in the range of 0 +20 and it is not trash. It is just a hint of what the target might be. Of course for known targets you know the vdi numbers. I think the safest approach with the leds is what Artyom suggested, i.e. ferrous/non-ferrous metals...

Good morning, Roderico. I think that there is no need to delay the glow, there should be a quick response. Held over the target, the LED blinked and went out. This is necessary in order to quickly identify several goals lying next to each other. And if there is a delay, the goals are determined as one or incorrect. Best regards, Artyom.

[roderico]

Thank you very much!!

LED vdi looks also interesting.
A great solution would be to use 4 led.
1 for iron
2 for trash for vdi 0 to +20.
3 for the range of +20to +50.
4 all above +50
what do you think about it

On a second thought, this could work very well as a replacement for the LCD, however, looking at the PIC12F683 data sheet pin 4 (GP3) might not be used for a led, so the vdi would only have 3 leds, or else to use a pic with more pins...

[roderico]

Thank you very much!!

LED vdi looks also interesting.
A great solution would be to use 4 led.
1 for iron
2 for trash for vdi 0 to +20.
3 for the range of +20to +50.
4 all above +50
what do you think about it

VDI numbers depends on the size, thickness, etc of the target, just put two or three similar coins together to see it. So it you have a thin coin it could be in the range of 0 +20 and it is not trash. It is just a hint of what the target might be. Of course for known targets you know the vdi numbers. I think the safest approach with the leds is what Artyom suggested, i.e. ferrous/non-ferrous metals...

[perkun]

Thank you very much!!

LED vdi looks also interesting.
A great solution would be to use 4 led.
1 for iron
2 for trash for vdi 0 to +20.
3 for the range of +20to +50.
4 all above +50
what do you think about it

[roderico]

VDI LCD v1.2

I added the VDI display time option and compiled a new version. The VDI value is displayed only for a few seconds (adjustable in the menu) if no metal object is near the coil. This is useful along with the VDI threshold as reported by perkun.

[roderico]

Would it be possible to add a depth indicator only in pinpoint mode like measuring signal strength and display it in cm?

It might be possible but it is not an easy task with this, just try with two different metal objects at the same distance and see the strength reading...

[Nandor]

Would it be possible to add a depth indicator only in pinpoint mode like measuring signal strength and display it in cm?

[roderico]

well done ! You should also add adjustable display time. As in the previous version.
Now the VDI number is displayed all the time and is not good.

This was done on purpose for remembering what was the last target, however, since there is still some space left in the pic I will add another menu entry for adjusting the display time in the next version. As a workaround you only need to lower the VDI threshold below ~ -75 and the ground signal will clear the display as in the previous version...

[perkun]

well done ! You should also add adjustable display time. As in the previous version.
Now the VDI number is displayed all the time and is not good.

[roderico]

Do you have a video about your working VDI? looks very interesting

Unfortunately I don't have any video, however there are some images also in the IDX-PRO thread:

http://www.geotech1.com/forums/showthread.php?18051-IDX-PRO-VDI/page147

[roderico]

led vdi v1.0

I've also made the missing pcb layout to complete the led vdi version, preferably to be used with a PIC12F683 since it has more memory than the PIC12F675, but it should also work also this one. I attached all the required files in a single zip file:

[Nandor]

Do you have a video about your working VDI? looks very interesting