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Mike Rivers[_2_] Mike Rivers[_2_] is offline
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Default [OT] Adding volume control to electronic device

On 1/2/2021 9:46 PM, Tobiah wrote:
I acquired an electronic dart board.Â* It barks out
information about each shot in a loud voice that
would bother other people in the house.Â* There doesn't
seem to be a way to control the volume.Â* I was wondering
whether I could just put a potentiometer in there to
get a volume control.


Certainly. Have you opened it up already to see what possibilities there
are to connect it?


I was thinking the signal could
go through pin one and two, with the third attached to
the other side of the speaker.Â* Would that be the
correct way to do it?


Depends on what you consider pins 1 and 2 (I assume you're talking about
the pot here), but I don't think you have it right anyway. The usual
hookup is as a voltage divider

-------------+
|
|||
|||--------------
Guts |||
||| Speaker
|||
|
--------------+----------------

Depending on the impedance of the loudspeaker, you'd probably want a
fairly low value pot, 1000 ohms or so. Or if you have an electronics
parts drawer or junk box, you could just try a fixed resistor in series
with either speaker lead. Start with 100 ohms. If it's still too loud,
use a higher value, if it's too quiet try a lower value. But if you want
it to be adjustable, then a pot is the way to go.



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