Version 4
SHEET 1 1136 724
WIRE 400 -384 400 -400
WIRE 160 -368 160 -400
WIRE 288 -368 288 -400
WIRE 400 -288 400 -320
WIRE 160 -256 160 -288
WIRE 288 -256 288 -288
WIRE 400 -192 400 -224
WIRE 400 -96 400 -128
WIRE 400 -16 400 -32
WIRE -368 16 -368 -16
WIRE 96 16 96 -48
WIRE 160 16 96 16
WIRE 336 32 224 32
WIRE 16 48 -48 48
WIRE 128 48 96 48
WIRE 160 48 128 48
WIRE 128 96 128 48
WIRE 400 112 400 80
WIRE 400 112 368 112
WIRE -368 128 -368 96
WIRE -240 128 -368 128
WIRE 400 128 400 112
WIRE -112 144 -176 144
WIRE -48 144 -112 144
WIRE 64 144 32 144
WIRE -368 160 -368 128
WIRE 128 224 128 192
WIRE 400 240 400 208
WIRE -368 288 -368 240
WIRE -32 288 -64 288
WIRE 80 288 32 288
WIRE 192 288 160 288
WIRE 192 368 192 288
WIRE -112 416 -112 144
WIRE -48 416 -112 416
WIRE 128 416 32 416
WIRE 192 480 192 464
FLAG 160 -256 0
FLAG 160 -400 V+
FLAG 192 0 V+
FLAG 192 64 0
FLAG 288 -400 VSIG
FLAG 288 -256 0
FLAG 400 -400 V+
FLAG 400 240 0
FLAG -48 48 VSIG
FLAG -240 160 VSIG
FLAG -208 112 V+
FLAG -208 176 0
FLAG 128 224 0
FLAG -64 288 V+
FLAG 192 480 0
FLAG 368 112 VSENSE
FLAG 96 -48 VSENSE
FLAG -368 288 0
FLAG -368 -16 V+
SYMBOL Opamps\\opamp2 192 -32 R0
SYMATTR InstName U1
SYMATTR Value LM324
SYMBOL voltage 160 -384 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 18V
SYMBOL npn 336 -16 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL voltage 288 -384 R0
WINDOW 3 24 44 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 24 44 Left 2
SYMATTR Value ""
SYMATTR InstName V2
SYMBOL LED 384 -96 R0
SYMATTR InstName D1
SYMATTR Value LXHL-BW02
SYMBOL res 384 112 R0
SYMATTR InstName R1
SYMATTR Value 10R
SYMBOL LED 384 -192 R0
SYMATTR InstName D2
SYMATTR Value LXHL-BW02
SYMBOL LED 384 -288 R0
SYMATTR InstName D3
SYMATTR Value LXHL-BW02
SYMBOL LED 384 -384 R0
SYMATTR InstName D4
SYMATTR Value LXHL-BW02
SYMBOL Opamps\\opamp2 -208 80 R0
SYMATTR InstName U2
SYMATTR Value LM324
SYMBOL npn 64 96 R0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL res 112 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL npn 128 368 R0
SYMATTR InstName Q3
SYMATTR Value 2N3904
SYMBOL LED -32 304 R270
WINDOW 0 72 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D5
SYMATTR Value LXHL-BW02
SYMBOL res 64 304 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 2.7k
SYMBOL res -384 0 R0
SYMATTR InstName R6
SYMATTR Value 330k
SYMBOL res -384 144 R0
SYMATTR InstName R7
SYMATTR Value 5.6k
SYMBOL res 48 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 48 400 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
TEXT -240 -264 Left 2 !.include LM324.txt
TEXT -240 -216 Left 2 !.dc V2 0mV 400mV