Pinpointer with discrimination "Cat-FM" on ATMega328P

[void118]

Friends,

I've made new video but I have no Idea when youtube will add subtitles to It.

https://youtu.be/phZfdfi7Wio

[void118]

hi
how this circuit discriminate?with voice of buzzer?because in the schematic there are the leds but there isnt any led in the pcb
void 118 can you explain ?in the schematic atmega has 32 pin but in the pcb has 28 pin?
best regard
zakari

Hi, about discrim. look at the video please, In short - voice and LED's, for best understanding I recomend you to read schematic cearfully, you will find there two LED's but someone dosn't need them and sounds Is enough for them. ATmega328P In TQF32 enclosure has 32 pins, but In DIP only 28.

[zakari]

hi
how this circuit discriminate?with voice of buzzer?because in the schematic there are the leds but there isnt any led in the pcb
void 118 can you explain ?in the schematic atmega has 32 pin but in the pcb has 28 pin?
best regard
zakari

[void118]

thank you! i would say we are ready to build pcb!

You are welcome)

[useus]

PCB 1.2 grb+pdf
size 30x92 mm

CAT-FM PCB 1.2.rar

[useus]

Dear friends,

here Is the new revision of my project, In attachment you will find new firmware and schematic.

1. I removed "Reset" button from PC6 and add "Set" button to PD2.

2. From now "Set button" will recalibrate pinpointer without restarting MCU.

3. If you are using Arduino board, old "Reset" button will work too but If you will add "Set" button you will get the opportunity
to recalibrate pinpointer without restarting MCU.

4. I dont think to redesign schematic In the nearest feature anymore.

5. Very soon the new "Set" button will obtain more functionality like switching to power save mode, sensitivity setting and
more.

6. My project Is placed on few resources, but this forum got this update first

https://drive.google.com/file/d/14KK...ew?usp=sharing

thank you! i would say we are ready to build pcb!

[useus]

Thanks Useus. I re-arranged a few things and corrected it. Is it ok now please? Thanks again, Marty.

this is my finished pcb and revised to version 1.2 loaded by void118, i used ground fill, then you will see the seeds where gnd are connected, you can follow the tracks and compare with your pcb
9v and btn seeds are not seen but are connected to gnd

[void118]

Friends, I've added subtitles to my videov and now you can translate them In the settings.

[void118]

Thanks Useus. I re-arranged a few things and corrected it. Is it ok now please? Thanks again, Marty.

Colleagues, help Marty please, I don't have enough time for everything. Thank you

[void118]

Is PD2 pin 4 of the Atmega328p? Is this here I place the Reset button to? Thanks, Marty.

Yes It Is. Look at the picture please:

Look at the new schematic carefully please, you don't need to place It anymore.

[void118]

What is the best frequency to tune the coil to please? Thanks, Marty.

20-25 kHz will work fine, you can tune this by selecting the coil capacitor(33nF) bigger capacitor->lower frequency, smaller capacitor -> higher frequency.

[void118]

Void118, is the fuse information inside the hex file or do you have to program the fuses as well ?

Also just to be correct if the 2.2uF cap is an a electrolytic you should show the + symbol on your schematic so people can make the project correctly,Thanks.

Thank you, you should program fuses separetly, fuse settings you can find In the schematic page. 2.2uF capacitor may be electrolytic, ceramic, tatntal or polyester - on your choice.

[6666]

Void118, is the fuse information inside the hex file or do you have to program the fuses as well ?

Also just to be correct if the 2.2uF cap is an a electrolytic you should show the + symbol on your schematic so people can make the project correctly,Thanks.

[MartyJ1963]

What is the best frequency to tune the coil to please? Thanks, Marty.

[MartyJ1963]

@Void118, Thanks for the project. Really kind of you to offer it here on Geotech. Much appreciated. Regards, Marty.