BRN Pi-1 DİJİTAL Pİ

[marti]

ODM, yes I see the mistake but still I tried it and it works, but I tried the right way and gives me an additional gain 5cm with the same currency and the same coil here I put the corrected scheme

[marti]

someone who can make the PCB for this modification?

[6666]

Marti what information is displayed on the LCD ? thanks

[marti]

Guru, yes LCD

[pnp007]

hi i need pcb file in sprinta or eagle format.

[cko47]

Guru, yes LCD[ATTACH]24409[/ATTACH]

5 years ago I assembled Russian variant PI metal detector. It is easy to assembly and have good parameters. But info is written in Russian. Must be translated.
Link http://www.masterkit.ru/info/magshow.php?num=320


My variant is better. Have adjusting frequency, pulse width, main delay, sample width, sensitivity. Used pic16f88.
http://www.geotech1.com/forums/showt...o&goto=newpost

[kt315]

first name is TRACKER-PI. later was renamed as KOSCHEJ-5I and the one with LCD KOSCHEJ-5IM.it is commercialize detector, no free accessable HEX, free is only demo HEX.

[cko47]

I think what to write a new program for this detector is not difficultly. But I can make it only for PIC16F8....... .
And I suspect that in this program (Koschej) is provide counter of switch on. Exist new project for Koschej with digital adjusting some parameters.

[kt315]

you can take HEX for CLONE-PI and try to desasembler it. there are projects for atmel and pic, I mean the pic one. CLONE schematic is similar to KOSCHEJ.

[cko47]

you can take HEX for CLONE-PI and try to desasembler it. there are projects for atmel and pic, I mean the pic one. CLONE schematic is similar to KOSCHEJ.

In the project Koschey is detailed described the principle of work for this detector. Therefore it is possible to write the program again from null.

[cko47]

Project BRN Pi-1.
Can explain purpose of pot 100 k (between R4 and R6) and also divider R10 +R11? It seems that the divider R10+R11 is intended for the control of a voltage of the battery. Pot 100k (between R4 and R6) is for null balance of U1A?
Thank You

[cko47]

...
Any help in further developing this machine will be very nice

I think, that using of this MCU (pic16f876) can not give high precision of AD conversion. 10 bit is approximately 5 mV resolution and more than 5 mcs time precision.
Using of other opportunity (compare mode) for pic16f88 or pic16f887 allows to receive higher accuracy of conversion and sensitivity (without AD conversion).

[bernte_one]

hello

i have build brn pi

how should i adjust the 100k trimpot fot the lm358?

whats is the best setting for this trimmer?

[bernte_one]

found the solution (Setup guide), so the detector can be adjusted very sensitiv without any additional instruments

next Task is to improove the lcd Connection, i think there a some conection made without any look in the datasheets

the hd44780 1602 lcd need a resitor for the led backlight and also a trimmer for contrast, with the 1k resistor the lcd is too bright for hidden treasure hunting

http://www.learningaboutelectronics....-a-HD44780-LCD

if anyone is interest i can send pcb for this Project for 10€ within europe

[mohandes]

[ATTACH]23505[/ATTACH][ATTACH]23505[/ATTACH]Hi all I have made the PI BRN-1 and I have made some changes and has doubled the depth.
I invite you to try these changes and provide feedback.
I experimented with a 18cm diameter coil, I use a coin of 2.5cm and detected to 14cm Then with the changes detected at 30cm

please certain the changes in pics.i see both but not different.
regards