Pinpointer with discrimination "Cat-FM" on ATMega328P

[useus]

But I'm sure that coil capacitor, I mean 33nF must be thermal stable, I can advise PolyPhenylene Sulfide ones.

it's too big!!
at the moment I use green cap, then we will see if it fits in the casing

[void118]

Thanks guys. @Void188, I am re-drawing my pcb in Sprint layout because I am not familiar with EasyEDA. Regards, Marty.

Marty, I think I will add button to project so you can add track from one pad to PD2 and second track from pad to Gnd It will be an external button for reset, settings e.t.c

[void118]

it's too big!!
at the moment I use green cap, then we will see if it fits in the casing

It was joke!!!

[MartyJ1963]

Sounds good Void118,,,interesting project! I have nearly fnished my sprint layout so Ill post it soon for you to check it for me before I begin to build. Thanks, Marty.

[void118]

Like this Marty)

[void118]

it's too big!!
at the moment I use green cap, then we will see if it fits in the casing

I prefer WIMA MKP one's...

[useus]

Marty, I think I will add button to project so you can add track from one pad to PD2 and second track from pad to Gnd It will be an external button for reset, settings e.t.c

in addition to this additional button do you plan to make any other hardware changes? so we don't have to redo the pcb several times ...

[useus]

EDIT.sorry

[void118]

in addition to this additional button do you plan to make any other hardware changes? so we don't have to redo the pcb several times ...

You know, I think In this version NO, In the second one may be, but the button from PD2 to Gnd will work In the next firmware anyway. But without tis button device will work anyway but with less functionality.

[void118]

I forgot, I modified the buzzer circuit with NPN BC327 transistor, I don't know why but there was something wrong with PNP transistors

[ATTACH]55176[/ATTACH]

UPS, thus I must rebuild firmware for your PCB because now buzzer triggering by low level and when device Is waiting for target on the otput you can see logic one

[void118]

I forgot, I modified the buzzer circuit with NPN BC327 transistor, I don't know why but there was something wrong with PNP transistors

I think It will be nice If you will correct It manually because we can confuse everyone now)

[useus]

solved

[void118]

I can always restore it as per your scheme, unfortunately with BC557 or BC327 it seems not to work

Look, I've tested BC557 with BC547 and It works perfect! And my friend, look at this please) https://aliexpress.ru/item/32291851648.html

[void118]

Dear friends, here Is link to world electronics distributer, you will find there anything you want, If you want buy an quality parts of course.

https://lcsc.com

[MartyJ1963]

Hi guys. Have I drawn this correctly please? Thanks, Marty.