Re: Reduce volume of AC buzzer

According to Michael Black <et472@xxxxxxxxxxxxxxxxxxx>:
Steve Greenland (steveg@xxxxxxxxxxxxx) writes:
I've got an old Gralab darkroom timer with a buzzer that is, to my
taste, way too loud. Some Gralabs had a volume adjustment knob, this one
doesn't. I'd like to add one.

Cover the buzzer with something. The more you cover it, the weaker
the sound will be.

Well, covering it doesn't do much, because, it turns out, quite a bit of
the noise is from it being bolted against the case. Installing a bit of
rubber padding between the two helped a lot. Whether or not it's enough,
we'll see.

I've also e-mailed Gralab, as suggested, to see if they'll sell me the
volume control part. If not, I guess I'll need to dig out my EE280 text
book and figure out how big a capacitor I need.

BTW, I pulled apart the box, and, as I suspected, it's just a coil with
a metal bar that strikes the base plate.

Thanks for the replies.

Steve
--
Steve Greenland
The irony is that Bill Gates claims to be making a stable operating
system and Linus Torvalds claims to be trying to take over the
world. -- seen on the net
.

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