PIM-2 Digital Metal Detector Project

[samii]

Mustafa wrote about connection of PCB to LCD
check connection according to below maybe lcd burned if you made wrong connection.
http://forum.lugatek.com/index.php/topic,61.1125.html at the bottom of page

1 = LED (-)
2 = LED (+)
3 = VDD_GND (-V)
4 = VCC (+V)
5 = VEE (KONTRAST)
6 = RS
7 = RW
8 = EN
9 = DB0
10 = DB1
11 = DB2
12 = DB3
13 = DB4
14 = DB5
15 = DB6
16 = DB7

[Qiaozhi]

Mustafa wrote about connection of PCB to LCD
check connection according to below maybe lcd burned if you made wrong connection.
http://forum.lugatek.com/index.php/topic,61.1125.html at the bottom of page

1 = LED (-)
2 = LED (+)
3 = VDD_GND (-V)
4 = VCC (+V)
5 = VEE (KONTRAST)
6 = RS
7 = RW
8 = EN
9 = DB0
10 = DB1
11 = DB2
12 = DB3
13 = DB4
14 = DB5
15 = DB6
16 = DB7

The pin numbers shown above refer to the connector on the PIM-2 PCB. All LCDs have pin 15 = LED(-), and pin 16 = LED(+). The pin numbers then run from 1 to 14 (instead of pin 3 to 16).

[Speedy_G]

i never got answer from user mustafa, but some people who work with him at turkish forum

you can buy pre-programmed µcontroller from them, latest firmware is v10

detector is not bad, desgin ist easy and powerfull if you look the parts
also it are not many parts, pcb is small and easy to build

so the last things i have to to is debugging my version so that i works with lcd, the supply part is ok but i suppose the data lines are changed betwenn my board layout and the latest firmware
maybe i will look at the other concept pcb (the bigger one) and copare how the lcd is connected there

Dear Bernte_one


I'm not too sure if your LCD problem that you are experiencing at the moment is related to a problem I had about 3 years ago when I built the Delta Pulse 2+ when I was getting 'garbled characters' on my LCD.


In one of my previous posts on Thunting.com concerning that LCD problem that I had, I mentioned that the reason why some LCDs are not working very well is the result of using an LCD module from a different manufacturer. For example, with some of these LCD modules, only garbled letters appeared on the top row of LCD screen (that was also happening in my case). This situation occurs when one uses the LCD models WH1602b (Winstar), DEM16216, GDM1602A or LMB162GDC (Topway).


This situation can be much improved without changing the software (hex file), but by using a different LCD model, such as ACM1602S (American Zettler Inc), MC1602J-SYL (Everbouquet) or DV-20400 (Data Vision). The 'funny garbled characters' that sometimes appear on the top row of the LCD have been reported by many experimenters (especially those who have built the Delta Pulse 2 Detector) on some of these forums.


I solved my problem by using an LCD module from a different manufacturer (apparently some cheaper Chinese-made LCD modules are 'not fast enough' to receive data from the microprocessor. As Altra has mentioned some time ago in the Geotech1 forum concerning the same problem: quote "A common problem encountered with charactor LCDs is a difference in initialization times. Certain brand LCDs are faster than others".


I hope this helps someone to solve their LCD problems when building and testing their PIM-2 detector.


Ciao


Speedy_G

[bernte_one]

solved problems yesterday before shooting my first rockets

silkscreen on pcb was a bit confusing i thought i can conect like the numbers on the pin header from 1-16 direct to lcd from 1-16

but i found solution as i looked on schematic after info from samii , first connecting the data lines, then power supply, led supply and lcd contrast

detectors works

first test indoor with 45cm coil gave me with basic setting 45-50cm for a simple brass belt buckle

i will give you short explanation how to connect pcb to lcd next days, video will follow too

[Jose]

PIM-2 works
Thanks to the friends of the forum. The connection of the LCD is incorrect, as mentioned in the previous post.
Besides my LCD damage.
The performance is not very good.
I am using the PIM-2 version, 05. Published by mrtronik and indeed the counter always shows 500.
Early tests indicate that performance can be improved by replacing R20 for a preset 10K. Adjust the preset, to decrease the resistance, for maximum gain while maintaining stability.
Regards.
Jose

[jladre]

PIM-2 works
Thanks to the friends of the forum. The connection of the LCD is incorrect, as mentioned in the previous post.
Besides my LCD damage.
The performance is not very good.
I am using the PIM-2 version, 05. Published by mrtronik and indeed the counter always shows 500.
Early tests indicate that performance can be improved by replacing R20 for a preset 10K. Adjust the preset, to decrease the resistance, for maximum gain while maintaining stability.
Regards.
Jose

Good work jose! Can you share the distance of your test? And please update how this machine work on real field..thanks

[Jose]

Hello jladre
I'm doing the first tests.
A bronze coin is detected in the air about 27 cm.
My coil has a diameter of 28 cm.
R 20, was replaced by a preset and adjusted to 3.6 K.
The "threshold" is not available, is error loading the program?, or because it is a "Demo". I do not know
Jose

[Speedy_G]

Hello jladre
I'm doing the first tests.
A bronze coin is detected in the air about 27 cm.
My coil has a diameter of 28 cm.
R 20, was replaced by a preset and adjusted to 3.6 K.
The "threshold" is not available, is error loading the program?, or because it is a "Demo". I do not know
Jose

Dear Jose


I had previously posted (THunting.com/Oct 2011) my detection results for the Delta Pulse 2+ PI metal detector (schematic by Elbombaci/Uykuzus) for a 1 Euro coin (as it is generally used as a reference for comparison in these MD forums). The sensitivity to a 1 Euro coin in an air test was 35 cm. At that time I also discovered that there was an improvement in sensitivity by about 10% when I replaced the 16 ohm speaker with a piezobuzzer.
So your obtaining 27 cm on a 'bronze coin' is meaningless unless you are able to specify the diameter (and maybe the thickness). Your coil diameter you said was 28 cm while my coil's diameter was 23 cm; so, in theory, your coil should have been capable of achieving a deeper detection distance (in air) than my coil, yet your results are worse.
I also want to build a 'digital' Delta Pulse PI (generally known now as PIM-2), but it would be stupid of me to embark on such a project if such a detector turns out to be LESS efficient that my existing Delta Pulse 2+ detector which I built some 3 tears ago and is working very very well.
As jladre was asking you in the previous post, we need an 'update how this machine work on real field' (his own words in commas...


Thanks


Ciao


Speedy_G

[Jose]

Thanks for answering Speedy_G
I recall your comments in the forum THunting.com concerning Delta Pulse 2 + PI.
I make the discriminator module at the time. A friend managed to block counter 200, but not to continue with this project.
As for the DP, the performance is very good.
Returning to the PIM-2, the yield is low, and noticed that is not available the "threshold" should be set between 0 and 20, as we read in the Turkish forum mode.
On the LCD, "T = 17" is read and is a fixed value that can not be altered, and corresponds to the "threshold".
As I said in my previous post, I do not know what the reason, either because it is a demo, or some error loading the program. Maybe someone made this project (Pim-2, V05), to remove doubts.
I performed some tests and measurements, and say that if I could perform audio module in the same way that the Delta Pulse (complete analog audio), the performance will be similar.
The field tests are still far for me.
I am using the currency in testing, it is bronze with a diameter of 23 mm.
Excuse my bad English.
Regards
Jose

[mrtronik]

Hello Jose.
Just checked the thread after long time.
I don't know if it helps you, but i checked pim2 in simulator with the "fixed" hex file.
The threshold value can be changed in the main screen with the buttons.
Value goes from 0 to 20.

[mrtronik]

"fixed" hex file for those asking for it.

[bernte_one]

how to connect pim2 mustafa pcb to 1602 lcd

[Speedy_G]

[ATTACH]34809[/ATTACH]


how to connect pim2 mustafa pcb to 1602 lcd

Dear bernte_one


Thanks for 'how to connect pim2 mustafa pcb to 1602 lcd'.
This should help some people to realize that the pin numbering on the 'Header' of the Delta Pulse 2 PCB is somewhat DIFFERENT from that on the 'Header' of the PIM-2 PCB, whether it is the version 05 or 06


of the latter (large or smaller PCB respectively).


However, I see that the main problem is NOT the numbering of the LCD pin connections on the 'Header' on the PCB boards, but rather the MANY different PINOUT sequences on the different LCD models from


different manufacturing companies. I might also add that any competent electronics technician, whether professional OR amateur, can easily determine the most likely pin connections, such as 'ground', 'positive'


rail, etc. on the PCB board 'Header' by carefully examining the schematic drawing for either the Delta Pulse 2 or for the PIM-2.


So, what I have done here, is that I have uploaded some photos that show examples of some of the more common PINOUTS for LCD models from various manufacturers.
The PINOUT sequences (numbers) are shown in yellow on the three representative LCD examples (note that the numbering always begins with #1 which will always be the Vss (GND -) pin on the LCD itself.


I hope this will help some people trying to connect their various LCD models to the 'Header' on the PCB of either their Delta Pulse 2 or their PIM-2 metal detector board.


Regards.


Ciao,


Speedy_G

[bernte_one]

most diy projects last years are based on 1602 hd44780 lcd, because the are available in big quantities and its also an industrial standard

at moment i am happy with pim2 mustafa but i have to install all for field testing and wait for better weather without snow
i have soem ideas for final setup, could be some nice small enclosure maybe hammond 1455 line with internal li-ion pack and charger

[Speedy_G]

[QUOTE=bernte_one;212141]most diy projects last years are based on 1602 hd44780 lcd, because the are available in big quantities and its also an industrial standard

Dear bernte_one

As I expected you missed the whole point of my post regarding the various PINOUT possibilities that I referred to which was due mainly to the different manufacturers.
The photos of those LCD models that I posted as examples are ALL HD44780-compatible. The slightly different PINOUTS available on many of the LCD models does NOT always imply that those models are not HD44780-compatible.
All I'm saying is that those people building the Delta Pulse 2 or the PIM-2 pulse-induction metal detectors should be aware of the possible differences in PINOUTS on LCD models that might not be what they expect them to be (e.g. they may not be in the SAME order from #1 to #16). However, I want to make a note here that, in all the LCD HD44780-compatible versions I have come across, they all begin with #1 (as Vss/GND-) and and end with #16 (LED-/cathode).

Regards

Ciao

Speedy_G