Groups > sci.electronics.design > #449029

Re: How to increase the volume of a metronome?

From	Don Kuenz <g@crcomp.net>
Newsgroups	sci.electronics.design
Subject	Re: How to increase the volume of a metronome?
Date	2017-02-24 14:56 +0000
Organization	A noiseless patient Spider
Message-ID	<20170224a@crcomp.net> (permalink)
References	(4 earlier) <o8msbf$1vp$1@dont-email.me> <20170223a@crcomp.net> <fb40a79c-32d1-46f4-a806-38e8a0fb692b@googlegroups.com> <20170223b@crcomp.net> <95aa4c69-85b3-404d-b892-ad56875cbaf5@googlegroups.com>

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tabbypurr@gmail.com wrote:
> On Friday, 24 February 2017 02:17:12 UTC, Don Kuenz  wrote:
>> tabbypurr wrote:
>
>> > Your asc won't run at all on this machine, no idea why.
>>
>> This zip file ought to contain everything you need:
>>
>> http://crcomp.net/Diary/metronome.zip
>>
>> Thank you,
>
> Cheers, works nicely.
>
> Your output voltages are lousy compared to the 9v supply.
>
> Replacing the 386 and using a transistor output would get you much
> better swing. But of course it requires other changes to avoid feeding
> the speaker dc or only operating on one of the 555's transitions.
> There are a few possible ways to do that. You also don't need the
> zobel if you're just switching it and using no nfb.
>
> Harmonics help with volume. You might inject some at each opportunity,
> eg output of 555 then again with passives across the speaker. Low duty
> cycle there should help with power requirements.
>
> If you go with added digital logic to process the 555 output into a
> rising edge at each 555 transition you might add some ringing there.
> The speaker housing can also be thin and somewhat resonant.
>
> I'm assuming you don't need to go to BTL or higher psu voltage.

You gave me lots of food for thought. The metronome was originally
conceived to be DIY quick and dirty. Your post may motivate me to try
harder.

Sharing this project has been a learning experience for me in many ways.
In the future, for example, my web server will host all .asc files. The
"standalone" nature of a usenet post appealed to me, but it's fraught
with too many ?Windows? gotchas.

My original circuit used a transistor, a 2N3904. But it outputted too
low of a volume, ergo this thread. FWIW, my metronome with a transistor
is available here:

http://crcomp.net/Diary/metronome3.asc

Thank you,

--
Don Kuenz KB7RPU

Thread

How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-13 15:28 +0000
  Re: How to increase the volume of a metronome? Tim Wescott <tim@seemywebsite.com> - 2017-02-13 11:15 -0600
    Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-13 19:28 +0000
  Re: How to increase the volume of a metronome? Don Y <blockedofcourse@foo.invalid> - 2017-02-13 11:21 -0700
    Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-13 19:28 +0000
      Re: How to increase the volume of a metronome? Don Y <blockedofcourse@foo.invalid> - 2017-02-13 13:00 -0700
  Re: How to increase the volume of a metronome? bitrex <bitrex@de.lete.earthlink.net> - 2017-02-13 13:42 -0500
    Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-13 19:58 +0000
  Re: How to increase the volume of a metronome? Tim Wescott <seemywebsite@myfooter.really> - 2017-02-13 12:43 -0600
    Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-13 19:47 +0000
    Re: How to increase the volume of a metronome? bitrex <bitrex@de.lete.earthlink.net> - 2017-02-13 18:05 -0500
  Re: How to increase the volume of a metronome? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2017-02-13 21:30 +0200
    Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-13 19:54 +0000
      Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-23 05:54 +0000
        Re: How to increase the volume of a metronome? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2017-02-23 16:43 +0200
          Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-23 15:23 +0000
            Re: How to increase the volume of a metronome? tabbypurr@gmail.com - 2017-02-23 16:29 -0800
              Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-24 02:15 +0000
                Re: How to increase the volume of a metronome? tabbypurr@gmail.com - 2017-02-24 01:49 -0800
                Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-24 14:56 +0000
                Re: How to increase the volume of a metronome? tabbypurr@gmail.com - 2017-02-24 07:21 -0800
                Re: How to increase the volume of a metronome? rickman <gnuarm@gmail.com> - 2017-02-24 14:11 -0500
                Re: How to increase the volume of a metronome? rickman <gnuarm@gmail.com> - 2017-02-24 15:28 -0500
                Re: How to increase the volume of a metronome? tabbypurr@gmail.com - 2017-02-24 12:37 -0800
                Re: How to increase the volume of a metronome? rickman <gnuarm@gmail.com> - 2017-02-24 15:46 -0500
                Re: How to increase the volume of a metronome? tabbypurr@gmail.com - 2017-02-24 13:23 -0800
                Re: How to increase the volume of a metronome? rickman <gnuarm@gmail.com> - 2017-02-24 17:49 -0500
                Re: How to increase the volume of a metronome? Don Kuenz <g@crcomp.net> - 2017-02-25 03:43 +0000
                Re: How to increase the volume of a metronome? tabbypurr@gmail.com - 2017-02-24 23:03 -0800
                Re: How to increase the volume of a metronome? rickman <gnuarm@gmail.com> - 2017-02-25 03:20 -0500
  Re: How to increase the volume of a metronome? Jasen Betts <jasen@xnet.co.nz> - 2017-02-15 11:11 +0000

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