Pinpointer with discrimination "Cat-FM" on ATMega328P

[void118]

Just now I tried to connect electromagnetic 16 Ohm buzzer and It's much louder than piezo buzzer....

[void118]

[ATTACH]55230[/ATTACH]

Or try to use electromagnetic one like this

https://www.amazon.com/Universal-Passive-Buzzer-Electromagnetic-Resistance/dp/B08FR7LBHK

[void118]

Emitter to VCC, Collector trough buzzer to GND, In parallel to buzzer 1K resistor, sound to base through 1K resistor

[void118]

It's not soldered wire It's thermocouple to show you transistor temperature....

Emitter to VCC, Collector trough buzzer to GND, In parallel to buzzer 1K resistor, sound to base through 1K resistor

[void118]

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

It's not soldered wire It's thermocouple to show you transistor temperature....

[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....

[useus]

[ATTACH]55225[/ATTACH]

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

[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

[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]

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]

New firmware v1.3, reset function Improved.

https://drive.google.com/file/d/1bKCJxG4S2oaw056smA0PL79uTgiYbkEo/view?usp=sharing

[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]

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....

[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]

Sound example, Listen to It please.

https://youtu.be/dMosKW4c_Pk