circuit connexion of potentiometer and external speaker

What sort of speaker? Dynamic one can overload arduino pin if connected directly - it can have several ohm resistance (so series connected potentiometer can help limiting current, if never set to zero) - better add additional resistor in series so max. current draw from the pin will not exceed MCU limits...

hi again

i have this one

www.google.com/url

ok - so it's not simple speaker but module with amplifier and speaker... 

So - look at schematics on the page you have provided and do the same (connect your second potentiometer exactly as in input section of this amplifier - it may be 10kOhm [or maybe 1kOhm (but not less) - because when higher values would be used, control linearity will suffer - parallel connection of second potentiometer of similar value], with one contact to the arduino, another to the ground and middle one [connected to the moving contact]  - to the speaker module). Do not forget to set builtin potentiometer for max allowable volume.

If you are good at soldering you can even desolder builtin potentiometer and connect your own - I assume you want something you can operate without screwdriver...

hi please i connect my potentiometer to this speaker to control sound volume by microbit but i didn´t succeed .help please
i connected gnd of potentiometer to gnd of microbit ,vcc to 5v and where i will connect out pin

for speaker i connect gnd to gnd ,vcc to vcc and sig to p1 of microbit

help please thx in advance
regards

hi please i connect my potentiometer to this speaker to control sound volume by microbit but i didn´t succeed .help please
i connected gnd of potentiometer to gnd of microbit ,vcc to 5v and where i will connect out pin

for speaker i connect gnd to gnd ,vcc to vcc and sig to p1 of microbit

help please thx in advance
regards

Have you ever had it working correctly? Only speaker module and microbit? And volume regulation using builtin potentiometer (this blue one)?

thx good question ,my answer is yes .i connected pin sig to p1 of microbit and gnd to gnd and vcc to 5v and i desativate microbit speaker and all works good

ok - so take potentiometer of value between 1 and 10 kOhm [1kOhm or 2.2kOhm or 4.7kOhm or 10kOhm)  and connect it (assuming center contact is connected to moving contact inside)

- one edge connector to microbit output

- another edge connector to gnd

- central (regulated) connector to speaker module's input

and do not forget to set blue potentiometer on speaker module to max volume (maybe it is set to zero so there is no sound?)

like this (but without capacitor) - as I have written previously - exactly like potentiometer that is at module's input (you can checkk schematics on the page you have provided):

i telled you that the speaker works good so the blue knob is not set to zero  yes or no.

please can you send me a circuit picture to describe connections

please i have trouble in : where i connect out pin of potentiometer?

where i connect sig pin of speaker and also vcc pin of speaker

yours trully

so i understand that i connect out pin of potentiometer to sig pin of speaker?

yes?   or to vcc pin of speaker that´s exactly what i search 

ok - so: set working system only with microbit and speaker module and check it.

then: disconnect only connection between microbit output and speaker module input

get potentiometer of proper value (what resistance is yours? it should be  printed somewhere on the case)

potentiometer has three pins - find which one is regulated (let's call it "center pin")

connect one pin (not "center pin") to microbits output

connect another pin (not "center pin") to the ground

connect "center pin" to speaker module's input

is it clear or is it something that needs additional explanation?

yes thx i will connect out pin of potentiometer to p2 of microbit and sig pin of speaker to p1 so i make this program shared and i will try

i hope it will work

i´m eager to know

makecode.microbit.org/_JKPMof632HH7

Ok - I have checked your code and now I understand...

You are trying to tune volume in your code using input  from potentiometer connected to another pin...

What I am trying to propose is to reduce/regulate signal from microbit  at "speaker's" input

So - only one of two: either put potentiometer between microbit and "speaker" or devise code that will scale output on microbit pin using any metric (for example - potentiometer connected to another contact or something else)

I think you are not doing what you thin you are doing:

so - you get voltage sample from P2 (from potentiometer), then write it to the output pin, then play sound disregarding pot value

check if music.playSoundEffect has variable setting volume and use pot variable to change volume