Pinpointer with discrimination "Cat-FM" on ATMega328P

[void118]

Void118, what value should the LOCK BIT be programmed to ? is it 00.

Hi, don't touch It please)

[void118]

Hi friends, It's very strange for me, I'm using this one buzzer https://aliexpress.ru/item/32817425949.html
and It Is very loud.

[void118]

Sound

I think I understand, I think you are trying to use simple speaker Instead PIEZO buzzer!? the speaker will work realy quietly, just replace It to Passive PIEZO buzzer and you will be pleasantly suprised.

[useus]

Hi friends, It's very strange for me, I'm using this one buzzer https://aliexpress.ru/item/32817425949.html
and It Is very loud.

do you take away a curiosity? the buzzer at what voltage do you feed it? yours should work at 5v, mine that I have at home are at 12v, now I would not want you to feed your buzzer at a higher voltage because if so it is right that it sounds very loud, while mine which is at 12v sounds normal
p.s. i use passive piezo buzzers

[void118]

do you take away a curiosity? the buzzer at what voltage do you feed it? yours should work at 5v, mine that I have at home are at 12v, now I would not want you to feed your buzzer at a higher voltage because if so it is right that it sounds very loud, while mine which is at 12v sounds normal
p.s. i use passive piezo buzzers

Piezo buzzer can work with 12V PWM without problem and resistor connected In parallel to buzzer Is because the buzzer you can think as capacitor.

[void118]

Sound example, Listen to It please.
https://youtu.be/dMosKW4c_Pk

[useus]

Sound example, Listen to It please.
https://youtu.be/dMosKW4c_Pk

connected like this sounds as loud as yours but transistor gets very hot. if I put resistance in parallel the volume goes down

[void118]

connected like this sounds as loud as yours but transistor gets very hot. if I put resistance in parallel the volume goes down

[ATTACH]55218[/ATTACH]

It' Incredible friend, special for you), please look:

1K resistor In parallel, K-type thermal pare, 2TY transistor = S8550, ambient temperature, transistor temperature....

[void118]

connected like this sounds as loud as yours but transistor gets very hot. if I put resistance in parallel the volume goes down

[ATTACH]55218[/ATTACH]

Connect your buzzer Into collector net please)

[void118]

New firmware v1.3, reset function Improved.
https://drive.google.com/file/d/1bKC...ew?usp=sharing

[useus]

Connect your buzzer Into collector net please)

does not change the situation, low volume, however, the transistor does not heat up


however this problem also has marty

[void118]

does not change the situation, low volume, however, the transistor does not heat up

however this problem also has marty

Ok, check please that you are using PNP transistor, then check PORTD.3 please, there Is must be "logic 1" In silent mode, It means that transistor Is closed and there Is no current flow, check current In your sound net In silent mode, check temperature, make few photos please, It's very strange. I can't understand how transistor can be hot when It's closed?

[useus]

Ok, check please that you are using PNP transistor, then check PORTD.3 please, there Is must be "logic 1" In silent mode, It means that transistor Is closed and there Is no current flow, check current In your sound net In silent mode, check temperature, make few photos please, It's very strange. I can't understand how transistor can be hot when It's closed?

with your scheme the transistor does not heat up, the scheme I loaded before was to make you understand that the buzzer sounds loud in that way.

PD3 is ok
tried more transistors S8550 bc557 2n3906 bc327

[useus]

[ATTACH]55225[/ATTACH]

i don't understand how you connected it, gnd ok, i/o ok, while vcc and the soldered wire?

[void118]

i don't understand how you connected it, gnd ok, i/o ok, while vcc and the soldered wire?

Like this:

Check collector and emiter of your transistor please, and show me your pcb design please....