IDX-PRO+VDI

[Qiaozhi]

Qiaozhi,

It's called a custom charactor. Here is one description.

http://www.geocities.com/dinceraydin/lcd/custom.htm

I do not mind sharing.
Using PIC-BASIC looks like this:
'********************************
DATA 'Define User Characters into EEPROM
4,4,4,31,4,4,4,4,_ ' CGRAM 0
0,0,12,0,12,0,0,0,_ ' CGRAM 1
14,31,17,17,17,17,17,31,_ ' CGRAM 2
14,31,17,17,17,17,31,31,_ ' CGRAM 3
14,31,17,17,17,31,31,31,_ ' CGRAM 4
14,31,17,17,31,31,31,31,_ ' CGRAM 5
14,31,17,31,31,31,31,31,_ ' CGRAM 6
14,31,31,31,31,31,31,31,_ ' CGRAM 7
'
'
FOR i = 0 to 63 'Loading User Characters into CGRAM
READ i,char
LCDOUT char
NEXT i
'******************************
P.S. The first two symbols are not for battery.

Thanks Altra and Holyuser!
Now it all becomes clear. It's time to go off and play.

[WM6]

Do you like this? http://www.youtube.com/watch?v=xtTIY6zK35c

Excellent work holyuser, congratulation!

How does VDI manage with rotating coin (mean with coin in different orientation regarding coil position)? Does it recognise coin with the same VDI number at the same max. VDI detecting distance with different coin orientation?

[Qiaozhi]

Easier than I thought!

[Qiaozhi]

4,4,4,31,4,4,4,4,_ ' CGRAM 0
0,0,12,0,12,0,0,0,_ ' CGRAM 1

P.S. The first two symbols are not for battery.

And (of course) the first two symbols are the zero VDI marker, and the equals sign, in that order.

[WM6]

Easier than I thought!

You have to recharge battery!

[holyuser]

You have to recharge battery!

There are still a lot of power into the battery while the empty battery starts blinking.

[holyuser]

How does VDI manage with rotating coin (mean with coin in different orientation regarding coil position)? Does it recognise coin with the same VDI number at the same max. VDI detecting distance with different coin orientation?

VDI readings depend on the quality of the analog part is connected. If the characteristics of the two channels x,y (synchrodetectors, filter-amplifiers) are close enough, then the numbers of coins are similar in different orientation and distance, until the maximum distance of detection. Let us remember that VDI measured only what it receives from the analog circuits of the detector.

[Jose]

Hello Forum
Is possible replacement for the PIC16F88?, Not available in my country.
thanks
Jose

[holyuser]

Is possible replacement for the PIC16F88?

Direct replacement without any changes can be PIC16LF88.

[Jose]

Holiuser Thanks, I will try to get it.
Jose

[holyuser]

Hi, Jose!
I could recompile the project to another PIC, but it will be possible when I have free time enough, moreover, would require hardware changes
Regards!

[WM6]

VDI readings depend on the quality of the analog part is connected. If the characteristics of the two channels x,y (synchrodetectors, filter-amplifiers) are close enough, then the numbers of coins are similar in different orientation and distance, until the maximum distance of detection. Let us remember that VDI measured only what it receives from the analog circuits of the detector.

Thank you holyuser!
Did you test how different coil shape (CC, DD, OO ...) affected VDI readings? Which shape is more appropriate if we follow accurate VDI recognition?

[Jose]

Thanks Holiuser
I will not need much work.
I think that getting the PIC16F88 in my country is a matter of time.
Best Regards

[holyuser]

Did you test how different coil shape (CC, DD, OO ...) affected VDI readings? Which shape is more appropriate if we follow accurate VDI recognition?

For now, I used VDI on a terrain with only 10" coplanar coil and the result is good enough to give up for now in other shapes.
Maybe in the winter I will do DD for next season.

[Sean_Goddard]

Jose, let me know how many PIC's you need I will source them and send them to you. Stuff ITAR!