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?
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Version 4 SHEET 1 960 936 WIRE -384 96 -512 96 WIRE -288 96 -384 96 WIRE 64 96 -288 96 WIRE 112 96 64 96 WIRE 304 96 112 96 WIRE 112 112 112 96 WIRE -384 128 -384 96 WIRE -288 192 -288 96 WIRE -240 192 -288 192 WIRE 112 192 112 176 WIRE 112 192 -16 192 WIRE 112 224 112 192 WIRE -384 256 -384 208 WIRE -240 256 -384 256 WIRE 16 256 -16 256 WIRE -384 304 -384 256 WIRE -240 320 -320 320 WIRE 176 320 -16 320 WIRE 176 336 176 320 WIRE 304 368 304 96 WIRE -240 384 -288 384 WIRE 64 384 64 96 WIRE 64 384 -16 384 WIRE 240 416 176 416 WIRE -384 448 -384 384 WIRE -320 448 -320 320 WIRE -320 448 -384 448 WIRE 16 448 16 256 WIRE 16 448 -320 448 WIRE -512 464 -512 96 WIRE -384 480 -384 448 WIRE -288 480 -288 384 WIRE 304 496 304 464 WIRE 176 512 176 496 WIRE -512 592 -512 544 WIRE -384 592 -384 544 WIRE -384 592 -512 592 WIRE -288 592 -288 544 WIRE -288 592 -384 592 WIRE 304 592 304 576 WIRE -512 640 -512 592 FLAG -512 640 0 FLAG 112 224 0 FLAG 176 512 0 FLAG 304 592 0 SYMBOL Misc\\NE555 -128 288 M0 SYMATTR InstName U1 SYMBOL res -368 112 M0 SYMATTR InstName Tempo1 SYMATTR Value 125k SYMBOL res -368 288 M0 WINDOW 0 36 43 Left 2 WINDOW 3 49 74 Left 2 SYMATTR InstName Tempo2 SYMATTR Value 125k SYMBOL cap -368 480 M0 WINDOW 0 -23 6 Left 2 WINDOW 3 -41 58 Left 2 SYMATTR InstName C2 SYMATTR Value 2.2\xc2\xb5F SYMBOL res 160 320 R0 WINDOW 0 -92 42 Left 2 WINDOW 3 -88 69 Left 2 SYMATTR InstName Vol1 SYMATTR Value 500 SYMBOL Misc\\battery -512 448 R0 WINDOW 0 12 95 Left 2 WINDOW 3 17 9 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 9 SYMBOL cap -304 480 R0 SYMATTR InstName C3 SYMATTR Value 0.1nF SYMBOL cap 96 112 R0 SYMATTR InstName C4 SYMATTR Value 100\xc2\xb5F SYMBOL res 160 400 R0 WINDOW 0 -86 47 Left 2 WINDOW 3 -87 76 Left 2 SYMATTR InstName Vol2 SYMATTR Value 500 SYMBOL npn 240 368 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL res 288 480 R0 SYMATTR InstName Speaker SYMATTR Value 8 TEXT -392 616 Right 2 !.tran 1 uic TEXT -8 176 Left 2 ;1 TEXT -8 240 Left 2 ;2 TEXT -8 304 Left 2 ;3 TEXT -8 360 Left 2 ;4 TEXT -296 368 Left 2 ;5 TEXT -296 304 Left 2 ;6 TEXT -296 240 Left 2 ;7 TEXT -296 176 Left 2 ;8
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Thank you,