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Re: How to increase the volume of a metronome?

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Don Kuenz <g@crcomp.net> wrote:
>
> Tauno Voipio <tauno.voipio@notused.fi.invalid> wrote:
>> On 13.2.17 17:28, 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 canonical response is LM386.
>>
>> It is not sensible to drive a speaker with a
>> follower here, it will eat your battery in
>> no time, and the speaker does not like the
>> DC bias on it.
>
> Good call! You just exterminated the battery eater in my subconscience.

The LM386 connected to Realistic Minimus 0.3 Bookshelf Speaker [1]
sounds excellent. Although the tempo pot works "as is" my goal is to
fine tune the pot / C1 circuitry to 40 bpm in fully counterclockwise
position and 208 bpm fully clockwise position.

My latest LTSpice circuit is included after the Note. It pulls in two
additional LTSpice subcircuits.

The first subcircuit models an LM386. [2] To use the LM386 just unzip it
then drop the lm386.asy and LM386.lib files into the folder with the asc
file included after Note.

The second subcircuit models a loudspeaker. [3] To use it just unzip it
then drop the Midrange.asc, Tweeter.asc, Wolfer.asc, and Loudspeaker.lib
into the folder with the asc file. Another goal of mine is to remove the
explicit declaration of Loudspeaker.lib from the asc file.

Note.

1. http://www.ebay.com/itm/272541834843
2. http://www.eas.uccs.edu/~mwickert/ece3001/lecture_notes/LM386_support_files.zip
3. http://www.electro-tech-online.com/attachments/loudspeaker-zip.88991/

------------------------------------------------------------------------
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 512 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 -240 384 -288 384^M
WIRE 64 384 64 96^M
WIRE 64 384 -16 384^M
WIRE 352 384 320 384^M
WIRE 224 416 176 416^M
WIRE 352 416 288 416^M
WIRE 512 416 512 96^M
WIRE 512 416 480 416^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 320 448 320 384^M
WIRE 352 448 320 448^M
WIRE 512 448 480 448^M
WIRE 544 448 512 448^M
WIRE 720 448 608 448^M
WIRE -512 464 -512 96^M
WIRE -384 480 -384 448^M
WIRE -288 480 -288 384^M
WIRE 176 512 176 496^M
WIRE 320 512 320 448^M
WIRE 512 576 512 448^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 720 624 720 448^M
WIRE -512 640 -512 592^M
WIRE 512 672 512 640^M
WIRE 512 768 512 752^M
WIRE 720 768 720 720^M
FLAG -512 640 0^M
FLAG 112 224 0^M
FLAG 176 512 0^M
FLAG 320 512 0^M
FLAG 512 768 0^M
FLAG 720 768 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 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 C2^M
SYMATTR Value 0.1nF^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 lm386 416 400 R0^M
SYMATTR InstName U2^M
SYMBOL polcap 96 112 R0^M
SYMATTR InstName C3^M
SYMATTR Value 100\xc2\xb5F^M
SYMATTR SpiceLine Rser=1^M
SYMBOL polcap 544 464 R270^M
WINDOW 0 32 32 VTop 2^M
WINDOW 3 0 32 VBottom 2^M
SYMATTR InstName C4^M
SYMATTR Value 250\xc2\xb5F^M
SYMATTR SpiceLine Rser=1^M
SYMBOL polcap -400 480 R0^M
SYMATTR InstName C1^M
SYMATTR Value 2.2\xc2\xb5F^M
SYMBOL polcap 496 576 R0^M
SYMATTR InstName C5^M
SYMATTR Value 0.05\xc2\xb5F^M
SYMBOL res 496 656 R0^M
SYMATTR InstName R1^M
SYMATTR Value 10^M
SYMBOL Woofer 720 672 R0^M
WINDOW 38 -32 28 Right 2^M
SYMATTR SpiceModel IB3858^M
SYMATTR InstName U3^M
SYMBOL polcap 224 432 R270^M
WINDOW 0 32 32 VTop 2^M
WINDOW 3 0 32 VBottom 2^M
SYMATTR InstName C6^M
SYMATTR Value 10\xc2\xb5F^M
TEXT -392 616 Right 2 !.tran 10 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
TEXT 80 848 Left 2 !.lib Loudspeaker.lib^M
------------------------------------------------------------------------

Thank you,

--
Don Kuenz KB7RPU

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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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