circuit connexion of potentiometer and external speaker

hi please i want to change the sound volume using potentiometer and a speaker with arduino.can you help me to do the connection circuit .thx in advance

kind regards

Top Replies

shabaz over 1 year ago in reply to naimlion +3

Hi, There's just two or three wires on the potentiometer. I strongly suggest you just wire it up (in any way you think fit, you can google this), and see what happens. You'll learn more from that experience…
JWx over 1 year ago in reply to phoenixcomm +2

In the end it turned out that it was software task - potentiometer was supposed to drive software based volume control, which the author finally achieved...
shabaz over 1 year ago in reply to naimlion +1

Hi, You're not bothering me, this is genuinely the best advice I can think of. It's the best way to learn, just to try it, because in this particular instance, you're very unlikely to damage anything…

JWx over 1 year ago in reply to naimlion

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?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
naimlion over 1 year ago in reply to JWx

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
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
naimlion over 1 year ago in reply to JWx

so i change sound volume only with this blue knob ?i can´t change sound volume with my personal potentiometer connected to microbit?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
javagoza over 1 year ago in reply to JWx

Then this Arduino schematics will help

AKX00037-schematics.pdf (arduino.cc)

from Arduino Make Your UNO Kit — Arduino Online Shop
Cancel
Vote Up +1 Vote Down

Sign in to reply

Cancel
JWx over 1 year ago in reply to naimlion

You can - simply add another potentiometer at the input :)
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
JWx over 1 year ago in reply to naimlion

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)
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
bidrohini over 1 year ago

You can make an audio amplifier with LM386. If you see the datasheet, you will find designs of Amplifiers with different gains. every design includes a potentiometer. You will be able to control volume with that. You can interface the amplifier with Arduino if needed.
Cancel
Vote Up +1 Vote Down

Sign in to reply

Cancel
JWx over 1 year ago in reply to JWx

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

basic.forever(function () {

    pot = pins.analogReadPin(AnalogPin.P2)

    pins.analogWritePin(AnalogPin.P1, pot)

    music.playSoundEffect(music.createSoundEffect(WaveShape.Sine, 5000, 0, 255, 0, 500, SoundExpressionEffect.None, InterpolationCurve.Linear), SoundExpressionPlayMode.UntilDone)

})

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
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
JWx over 1 year ago in reply to JWx

have you tried putting pot value to

music.setVolume(pot)

playSoundEffect doesn't have volume variable but setVolume may set i globally (maybe)?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
naimlion over 1 year ago in reply to JWx

it works now but look to my code that just i used play ton ...bloc and not melody but me i want to play melody and change sound volume

here i share my makecode code and my circuit
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel