Version 4
SHEET 1 880 680
WIRE 384 -128 288 -128
WIRE 384 -112 384 -128
WIRE 528 -64 496 -64
WIRE 672 -64 608 -64
WIRE 384 -16 384 -32
WIRE 496 -16 496 -64
WIRE 496 -16 384 -16
WIRE 496 0 496 -16
WIRE 544 0 496 0
WIRE 672 0 672 -64
WIRE 672 0 608 0
WIRE 64 64 64 32
WIRE -464 80 -464 64
WIRE 496 80 496 0
WIRE 544 80 496 80
WIRE 672 96 672 0
WIRE 672 96 608 96
WIRE 160 112 112 112
WIRE 352 112 304 112
WIRE 448 112 432 112
WIRE 544 112 448 112
WIRE -464 176 -464 160
WIRE -400 176 -464 176
WIRE 64 176 64 144
WIRE 448 176 448 112
WIRE -464 192 -464 176
WIRE -464 304 -464 272
WIRE 240 416 240 384
WIRE 336 464 288 464
WIRE 240 528 240 496
WIRE 192 624 192 608
FLAG -400 176 0
FLAG -464 64 +5
FLAG -464 304 -5
FLAG -464 640 0
FLAG -464 560 10
FLAG 192 544 10
FLAG 192 624 0
FLAG 448 240 0
FLAG 240 528 0
FLAG 336 464 Vref-1
FLAG 240 384 v-
FLAG 288 -128 Vref-1
FLAG 576 64 +5
FLAG 576 128 -5
FLAG 64 176 0
FLAG 160 112 Vref-1
FLAG 64 32 +5
SYMBOL voltage -464 64 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -464 176 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage -464 544 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 10
SYMBOL EXTRA\\ExtraOpamps\\LM324_ST 192 576 R0
SYMATTR InstName U2
SYMBOL EXTRA\\ExtraOpamps\\LM324_ST 576 96 R0
SYMATTR InstName U3
SYMBOL res 448 96 R90
WINDOW 0 -4 59 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 8k
SYMBOL cap 432 176 R0
SYMATTR InstName C1
SYMATTR Value 470n
SYMBOL cap 608 -16 R90
WINDOW 0 12 -1 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 470n
SYMBOL res 368 -128 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 624 -80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL Pot&Sw\\potentiometer 224 400 R0
SYMATTR InstName U4
SYMATTR Value Rt=100 set=.8
SYMBOL Pot&Sw\\potentiometer 48 48 R0
SYMATTR InstName U1
SYMATTR Value Rt=100 set=.8
