create spice/lib, with shematics and symbols

spice/lib/summing.asc

@@ -0,0 +1,76 @@
+Version 4.1
+SHEET 1 880 680
+WIRE 128 -80 -16 -80
+WIRE 288 -80 208 -80
+WIRE 128 16 -64 16
+WIRE 288 16 288 -80
+WIRE 288 16 208 16
+WIRE 368 96 320 96
+WIRE 496 96 448 96
+WIRE 128 128 -64 128
+WIRE 288 128 288 16
+WIRE 288 128 208 128
+WIRE 288 192 288 128
+WIRE 320 192 320 96
+WIRE 320 192 288 192
+WIRE 352 192 320 192
+WIRE 496 208 496 96
+WIRE 496 208 416 208
+WIRE 576 208 496 208
+WIRE 128 224 -32 224
+WIRE 288 224 288 192
+WIRE 288 224 208 224
+WIRE 352 224 320 224
+WIRE 128 320 0 320
+WIRE 288 320 288 224
+WIRE 288 320 208 320
+WIRE 320 352 320 224
+FLAG 320 352 0
+FLAG -16 -80 in1
+IOPIN -16 -80 In
+FLAG -64 16 in2
+IOPIN -64 16 In
+FLAG -64 128 in3
+IOPIN -64 128 In
+FLAG -32 224 in4
+IOPIN -32 224 In
+FLAG 0 320 in5
+IOPIN 0 320 In
+FLAG 576 208 out
+IOPIN 576 208 Out
+SYMBOL OpAmps\\opamp 384 144 R0
+SYMATTR InstName U1
+SYMBOL res 224 0 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R1
+SYMATTR Value 33
+SYMATTR SpiceLine tol=5
+SYMBOL res 224 112 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R2
+SYMATTR Value 33
+SYMATTR SpiceLine tol=5
+SYMBOL res 224 208 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R3
+SYMATTR Value 33
+SYMATTR SpiceLine tol=5
+SYMBOL res 224 304 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R4
+SYMATTR Value 33
+SYMATTR SpiceLine tol=5
+SYMBOL res 224 -96 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R5
+SYMATTR Value 33
+SYMATTR SpiceLine tol=5
+SYMBOL res 464 80 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R11