Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.electronics.design > #447582

Re: How to increase the volume of a metronome?

Show key headers only | View raw

Tim Wescott <seemywebsite@myfooter.really> wrote:
> On Mon, 13 Feb 2017 15:28:06 +0000, Don Kuenz wrote:
>
>> Greetings,
>>
>> Comments are sought on additional circuitry to increase the speaker
>> volume of the circuit shown between the lines. Comments on circuit
>> simplifications are also sought. (Maybe a 555 with a couple of pots is
>> as simple as it gets sometimes?)
>>
>> The Tempo1/Tempo2 resistor pair signifies a pot as does the Vol1/Vol2
>> pair. Is there a better way to capture pots with LTSpice?
>>
>
> Your newsreader has mangled the file by taking out the linefeeds -- I was
> going to take a second look, but I'd have to slave over it to
> reconstitute.
>
> At any rate, from experience: you want lots of high frequency content to
> get a "tick" instead of a "thump".  If you're using a speaker this means
> delivering a very narrow impulse to the speaker, and using a speaker that
> has good high-frequency characteristics.  Fortunately, it also means that
> you don't need an amplifier in the classic sense -- you can have a simple
> one-transistor "pull it down hard and let go" amplifier, or a slightly
> less simple class B pair, and don't worry about crossover distortion.
>
> I'd handle volume either by changing the final stage final voltage, or by
> modulating the length of the (very narrow!) pulse I send to the final
> stage.  The second method will change the frequency content -- as it gets
> louder it'll be more of a "thud" than a "tick", but try it, you might
> like it.

Let's see if linefeeds "Windows style" works this time:

------------------------------------------------------------------------

Version 4^M
SHEET 1 960 936^M
WIRE -384 96 -512 96^M
WIRE -288 96 -384 96^M
WIRE 64 96 -288 96^M
WIRE 112 96 64 96^M
WIRE 304 96 112 96^M
WIRE 112 112 112 96^M
WIRE -384 128 -384 96^M
WIRE -288 192 -288 96^M
WIRE -240 192 -288 192^M
WIRE 112 192 112 176^M
WIRE 112 192 -16 192^M
WIRE 112 224 112 192^M
WIRE -384 256 -384 208^M
WIRE -240 256 -384 256^M
WIRE 16 256 -16 256^M
WIRE -384 304 -384 256^M
WIRE -240 320 -320 320^M
WIRE 176 320 -16 320^M
WIRE 176 336 176 320^M
WIRE 304 368 304 96^M
WIRE -240 384 -288 384^M
WIRE 64 384 64 96^M
WIRE 64 384 -16 384^M
WIRE 240 416 176 416^M
WIRE -384 448 -384 384^M
WIRE -320 448 -320 320^M
WIRE -320 448 -384 448^M
WIRE 16 448 16 256^M
WIRE 16 448 -320 448^M
WIRE -512 464 -512 96^M
WIRE -384 480 -384 448^M
WIRE -288 480 -288 384^M
WIRE 304 496 304 464^M
WIRE 176 512 176 496^M
WIRE -512 592 -512 544^M
WIRE -384 592 -384 544^M
WIRE -384 592 -512 592^M
WIRE -288 592 -288 544^M
WIRE -288 592 -384 592^M
WIRE 304 592 304 576^M
WIRE -512 640 -512 592^M
FLAG -512 640 0^M
FLAG 112 224 0^M
FLAG 176 512 0^M
FLAG 304 592 0^M
SYMBOL Misc\\NE555 -128 288 M0^M
SYMATTR InstName U1^M
SYMBOL res -368 112 M0^M
SYMATTR InstName Tempo1^M
SYMATTR Value 125k^M
SYMBOL res -368 288 M0^M
WINDOW 0 36 43 Left 2^M
WINDOW 3 49 74 Left 2^M
SYMATTR InstName Tempo2^M
SYMATTR Value 125k^M
SYMBOL cap -368 480 M0^M
WINDOW 0 -23 6 Left 2^M
WINDOW 3 -41 58 Left 2^M
SYMATTR InstName C2^M
SYMATTR Value 2.2\xb5F^M
SYMBOL res 160 320 R0^M
WINDOW 0 -92 42 Left 2^M
WINDOW 3 -88 69 Left 2^M
SYMATTR InstName Vol1^M
SYMATTR Value 500^M
SYMBOL Misc\\battery -512 448 R0^M
WINDOW 0 12 95 Left 2^M
WINDOW 3 17 9 Left 2^M
WINDOW 123 0 0 Left 2^M
WINDOW 39 0 0 Left 2^M
SYMATTR InstName V1^M
SYMATTR Value 9^M
SYMBOL cap -304 480 R0^M
SYMATTR InstName C3^M
SYMATTR Value 0.1nF^M
SYMBOL cap 96 112 R0^M
SYMATTR InstName C4^M
SYMATTR Value 100\xb5F^M
SYMBOL res 160 400 R0^M
WINDOW 0 -86 47 Left 2^M
WINDOW 3 -87 76 Left 2^M
SYMATTR InstName Vol2^M
SYMATTR Value 500^M
SYMBOL npn 240 368 R0^M
SYMATTR InstName Q1^M
SYMATTR Value 2N3904^M
SYMBOL res 288 480 R0^M
SYMATTR InstName Speaker^M
SYMATTR Value 8^M
TEXT -392 616 Right 2 !.tran 1 uic^M
TEXT -8 176 Left 2 ;1^M
TEXT -8 240 Left 2 ;2^M
TEXT -8 304 Left 2 ;3^M
TEXT -8 360 Left 2 ;4^M
TEXT -296 368 Left 2 ;5^M
TEXT -296 304 Left 2 ;6^M
TEXT -296 240 Left 2 ;7^M
TEXT -296 176 Left 2 ;8^M

------------------------------------------------------------------------

Thank you,

--
Don Kuenz KB7RPU

Back to sci.electronics.design | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

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

csiph-web