Upload files to "/"

spice/available-resistors.csv

@@ -0,0 +1,26 @@
+Value (Ohms),Pieces,Tolerance
+1,40,5.00%
+2.2,40,5.00%
+3.3,40,5.00%
+10,40,5.00%
+22,40,5.00%
+47,40,5.00%
+68,40,5.00%
+100,40,5.00%
+120,40,5.00%
+150,40,5.00%
+220,40,5.00%
+330,40,5.00%
+470,40,5.00%
+560,40,5.00%
+680,40,5.00%
+1000,40,5.00%
+2000,40,5.00%
+2200,40,5.00%
+4700,40,5.00%
+5600,40,5.00%
+10000,40,5.00%
+22000,40,5.00%
+47000,40,5.00%
+100000,40,5.00%
+1000000,40,5.00%

spice/lib/Draft1.asc

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+SYMATTR InstName X1
+SYMBOL summing 448 32 R0
+SYMATTR InstName X2
+SYMBOL voltage -256 48 R0
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V1
+SYMATTR Value SINE(0 15 300)
+TEXT -288 272 Left 2 !.tran 5

spice/lib/Draft1.log

@@ -0,0 +1,18 @@
+LTspice 24.1.10 for Windows
+Circuit: Z:\home\ja\git\305_project\spice\lib\Draft1.net
+Start Time: Thu Nov 20 14:51:51 2025
+solver = Normal
+Maximum thread count: 12
+tnom = 27
+temp = 27
+method = trap
+WARNING: Node x1:n018 is floating.
+
+Direct Newton iteration for .op point succeeded.
+Total elapsed time: 14.977 seconds.
+
+Files loaded:
+Z:\home\ja\git\305_project\spice\lib\Draft1.net
+C:\users\ja\AppData\Local\LTspice\lib\cmp\standard.bjt
+C:\users\ja\AppData\Local\LTspice\lib\sub\UniversalOpAmp2.lib
+

spice/lib/backup

@@ -0,0 +1,87 @@
+* Z:\home\ja\git\305_project\spice\lib\Draft1.asc
+* Generated by LTspice 24.1.10 for Windows.
+X§X1 NC_01 N001 N002 N003 N004 N005 input-and-filters
+X§X2 N001 N002 N003 N004 N005 NC_02 summing
+V1 NC_03 0 SINE(0 15 300)
+
+* block symbol definitions
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+C1 N002 inputjack 1600µF
+R1 N001 N002 1.1K tol=1 pwr=0.1
+Q1 N001 N002 N006 0 2N3904
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+R3 N006 0 565
+V1 N001 0 12
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+R5 N004 N007 47 tol=5
+R6 N008 N004 3.3 tol=5
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+C4 N003 N008 47µF
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+R14 N009 P003 1 tol=5
+C5 N009 0 10µF
+C6 N010 N009 10µF
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+R16 N007 N011 68 tol=5
+R17 N011 N007 68 tol=5
+R18 N007 N011 68 tol=5
+R19 N011 N007 68 tol=5
+C7 N011 0 10µF
+C8 N012 N011 10µF
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+R21 N013 N012 10 tol=5
+R22 N013 0 10 tol=5
+R23 P004 N007 47 tol=5
+R24 P005 P004 1
+R25 N014 P005 1
+C9 N014 0 1µF
+C10 N015 N014 C
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+R27 P007 P006 22 tol=5
+R28 P007 P008 22 tol=5
+R29 P008 0 22 tol=5
+R30 N007 N016 10 tol=5
+R31 N007 N016 10 tol=5
+R32 N017 N016 47 tol=5
+R33 N016 N017 3.3 tol=5
+R34 N018 N017 10 tol=5
+C11 N018 0 1µF
+C12 N019 N018 1µF
+R35 N020 N019 22 tol=5
+R36 N019 N020 22 tol=5
+R37 0 N020 1 tol=5
+X§U1 0 N003 out1 opamp Aol=100K GBW=10Meg ;§pnba invin)noninvin)out
+R38 out1 0 500
+X§U2 0 N010 out2 opamp Aol=100K GBW=10Meg ;§pnba invin)noninvin)out
+R39 out2 0 500
+X§U3 0 N012 out3 opamp Aol=100K GBW=10Meg ;§pnba invin)noninvin)out
+R40 out3 0 500
+X§U4 0 N015 out4 opamp Aol=100K GBW=10Meg ;§pnba invin)noninvin)out
+R41 out4 0 500
+X§U5 0 N019 out5 opamp Aol=100K GBW=10Meg ;§pnba invin)noninvin)out
+R42 out5 0 500
+.ends input-and-filters
+
+.subckt summing in1 in2 in3 in4 in5 out
+X§U1 N001 0 out opamp Aol=100K GBW=10Meg ;§pnba invin)noninvin)out
+R1 N001 in2 33 tol=5
+R2 N001 in3 33 tol=5
+R3 N001 in4 33 tol=5
+R4 N001 in5 33 tol=5
+R5 N001 in1 33 tol=5
+R11 out N001 R
+.ends summing
+
+.model NPN NPN
+.model PNP PNP
+.lib C:\users\ja\AppData\Local\LTspice\lib\cmp\standard.bjt
+.tran 5
+.backanno
+.end

spice/lib/input-and-filters.asc

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+SYMATTR InstName U4
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+TEXT 336 -136 Left 2 ;Input Section
+TEXT 1112 40 Left 2 ;90Hz-110Hz
+TEXT 896 152 Left 2 ;low  pass (37 ohm)
+TEXT 1280 144 Left 2 ;high pass (27 ohm)
+TEXT 1168 496 Left 2 ;290Hz-310Hz
+TEXT 968 592 Left 2 ;low pass (55 ohm)
+TEXT 1376 592 Left 2 ;high pass (47 ohm)
+TEXT 1160 808 Left 2 ;950Hz-1050Hz
+TEXT 888 872 Left 2 ;low pass (17 ohm)
+TEXT 1312 960 Left 2 ;high pass (15 ohm)
+TEXT 1088 1224 Left 2 ;3.2kHz-3.4kHz
+TEXT 960 1400 Left 2 ;low pass (49 ohm)
+TEXT 1376 1440 Left 2 ;high pass (46 ohm)
+TEXT 1160 1720 Left 2 ;9kHz-11kHz
+TEXT 928 1800 Left 2 ;low pass (18 ohm)
+TEXT 1280 1840 Left 2 ;high pass (14 ohm)
+TEXT 2344 144 Left 2 ;this side goes into a summing amp
+TEXT -32 2184 Left 2 !.tran 5

spice/lib/input-and-filters.asy

@@ -0,0 +1,26 @@
+Version 4
+SymbolType BLOCK
+LINE Normal -15 49 -15 -49
+LINE Normal 19 49 -15 49
+LINE Normal 80 167 19 49
+LINE Normal 81 -158 80 167
+LINE Normal 26 -47 81 -158
+LINE Normal -15 -49 26 -47
+PIN -16 0 RIGHT 8
+PINATTR PinName inputjack
+PINATTR SpiceOrder 1
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+PINATTR SpiceOrder 2
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+PINATTR PinName out2
+PINATTR SpiceOrder 3
+PIN 80 0 LEFT 8
+PINATTR PinName out3
+PINATTR SpiceOrder 4
+PIN 80 80 LEFT 8
+PINATTR PinName out4
+PINATTR SpiceOrder 5
+PIN 80 144 LEFT 8
+PINATTR PinName out5
+PINATTR SpiceOrder 6

spice/lib/input-and-filters.log

@@ -0,0 +1,18 @@
+LTspice 24.1.10 for Windows
+Circuit: Z:\home\scott\Documents\git\305_project\spice\lib\input-and-filters.net
+Start Time: Thu Nov 20 14:22:51 2025
+solver = Normal
+Maximum thread count: 8
+tnom = 27
+temp = 27
+method = trap
+WARNING: Node n018 is floating.
+
+Direct Newton iteration for .op point succeeded.
+Total elapsed time: 0.599 seconds.
+
+Files loaded:
+Z:\home\scott\Documents\git\305_project\spice\lib\input-and-filters.net
+C:\users\scott\AppData\Local\LTspice\lib\cmp\standard.bjt
+C:\users\scott\AppData\Local\LTspice\lib\sub\UniversalOpAmp2.lib
+

spice/lib/summing.asc

@@ -0,0 +1,98 @@
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+SYMATTR InstName U2
+SYMBOL voltage 448 432 R0
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+SYMATTR InstName V1
+SYMATTR Value -12
+SYMBOL voltage 560 432 R0
+WINDOW 123 0 0 Left 0
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+SYMATTR InstName V2
+SYMATTR Value 12
+TEXT -152 400 Left 2 !.tran 5

spice/lib/summing.asy

@@ -0,0 +1,24 @@
+Version 4
+SymbolType BLOCK
+LINE Normal -76 136 -76 -104
+LINE Normal 128 20 -76 136
+LINE Normal 128 -15 128 20
+LINE Normal -76 -104 128 -15
+PIN -80 -80 RIGHT 8
+PINATTR PinName in1
+PINATTR SpiceOrder 1
+PIN -80 -32 RIGHT 8
+PINATTR PinName in2
+PINATTR SpiceOrder 2
+PIN -80 16 RIGHT 8
+PINATTR PinName in3
+PINATTR SpiceOrder 3
+PIN -80 64 RIGHT 8
+PINATTR PinName in4
+PINATTR SpiceOrder 4
+PIN -80 112 RIGHT 8
+PINATTR PinName in5
+PINATTR SpiceOrder 5
+PIN 128 0 LEFT 8
+PINATTR PinName out
+PINATTR SpiceOrder 6

spice/lib/summing.log

@@ -0,0 +1,15 @@
+LTspice 24.1.10 for Windows
+Circuit: Z:\home\scott\Documents\git\305_project\spice\lib\summing.net
+Start Time: Thu Nov 20 14:24:30 2025
+solver = Normal
+Maximum thread count: 8
+tnom = 27
+temp = 27
+method = trap
+Direct Newton iteration for .op point succeeded.
+Total elapsed time: 0.327 seconds.
+
+Files loaded:
+Z:\home\scott\Documents\git\305_project\spice\lib\summing.net
+C:\users\scott\AppData\Local\LTspice\lib\sub\UniversalOpAmp2.lib
+

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spice/opamp_output_section.asc

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spice/rvals-theory2.md

@@ -0,0 +1,48 @@
+# Resistor Values and Combinations
+
+...with reducing resistor count as a priority.
+
+This time not while half-asleep.
+
+## 90Hz-110Hz
+
+### low-pass
+$(120 \parallel 47) + 3.3 = 37.072 \Omega$
+
+### high-pass
+$(68 \parallel 47) + (470 \parallel 2.2) = 28.245 \Omega$
+
+## 290Hz-310Hz
+
+### low-pass
+$22 + 22 + 10 + 1 = 55 \Omega$
+
+### high-pass
+$47 \Omega$ resistors are already available.
+
+## 950Hz-1050Hz
+
+### low-pass
+$((68 \parallel 68) \parallel (68 \parallel 68)) = 17 \Omega$
+
+### high-pass
+$(10 \parallel 10) + 10 = 15 \Omega$
+
+## 3.2kHz - 3.4kHz
+
+## low-pass
+$47 + 1 + 1 = 49 \Omega$
+
+## high-pass
+$22 + 22 + 1 + 1 = 46 \Omega$
+
+## 9khz - 11khz
+
+## low-pass
+$(10 \parallel 10) + (47 \parallel 3.3) + 10 = 18.083 \Omega$
+
+## high-pass
+$(22 \parallel 22) + 1 + 1 + 1 = 14 \Omega$ **(better tolerance)**
+
+Alternative: $10 + 1 + 1 + 1 + 1 = 14 \Omega$ **(worse tolerance)**
+