Version 4
SHEET 1 880 680
WIRE 48 -288 -112 -288
WIRE 272 -288 48 -288
WIRE 480 -288 272 -288
WIRE -112 -240 -112 -288
WIRE 48 -240 48 -288
WIRE 336 -192 112 -192
WIRE -112 -80 -112 -160
WIRE 48 -80 48 -144
WIRE 48 -80 -112 -80
WIRE 80 -80 48 -80
WIRE 176 -80 80 -80
WIRE -112 -16 -112 -80
WIRE 80 -16 80 -80
WIRE 336 16 336 -192
WIRE 480 16 480 -288
WIRE 192 64 80 64
WIRE -112 96 -112 64
WIRE 144 96 -112 96
WIRE -112 128 -112 96
WIRE 80 128 80 64
WIRE 272 160 272 -288
WIRE 192 176 192 64
WIRE 240 176 192 176
WIRE 336 192 336 96
WIRE 336 192 304 192
WIRE 144 208 144 96
WIRE 240 208 144 208
WIRE -112 256 -112 208
WIRE 80 256 80 208
WIRE 80 256 -112 256
WIRE 272 256 272 224
WIRE 272 256 80 256
WIRE 480 256 480 96
WIRE 480 256 272 256
WIRE 80 304 80 256
FLAG 80 304 0
FLAG 176 -80 Out
IOPIN 176 -80 Out
SYMBOL Opamps\\UniversalOpamp2 272 192 R0
SYMATTR InstName U1
SYMBOL res 320 0 R0
SYMATTR InstName R1
SYMATTR Value 3k
SYMBOL res -128 -32 R0
SYMATTR InstName Pt
SYMATTR Value 12
SYMBOL res 64 -32 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res -128 112 R0
SYMATTR InstName R4
SYMATTR Value 40
SYMBOL res 64 112 R0
SYMATTR InstName R5
SYMATTR Value 3k
SYMBOL npn 112 -240 M0
SYMATTR InstName Q1
SYMBOL voltage 480 0 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res -128 -256 R0
SYMATTR InstName R6
SYMATTR Value 3k
TEXT -130 328 Left 2 !.tran 1s