Version 4
SHEET 1 1684 1208
WIRE 64 192 -368 192
WIRE 352 192 64 192
WIRE 496 192 352 192
WIRE 1184 192 496 192
WIRE 64 272 64 192
WIRE 64 368 64 352
WIRE 288 368 64 368
WIRE 64 400 64 368
WIRE 352 416 352 192
WIRE 288 432 288 368
WIRE 320 432 288 432
WIRE 832 448 384 448
WIRE 1184 448 1184 192
WIRE 1184 448 896 448
WIRE 320 464 288 464
WIRE 64 544 64 480
WIRE 352 544 352 480
WIRE 496 592 496 192
WIRE 496 592 352 592
WIRE 288 608 288 464
WIRE 288 608 -272 608
WIRE 352 656 352 592
WIRE 288 672 288 608
WIRE 320 672 288 672
WIRE 768 688 384 688
WIRE 784 688 768 688
WIRE 1184 688 1184 448
WIRE 1184 688 832 688
WIRE 320 704 288 704
WIRE -272 720 -272 688
WIRE 1184 752 1184 688
WIRE -368 800 -368 192
WIRE 80 800 -368 800
WIRE 80 864 80 800
WIRE -368 912 -368 800
WIRE 80 976 80 944
WIRE 288 976 288 704
WIRE 288 976 80 976
WIRE 80 1008 80 976
WIRE -368 1168 -368 992
WIRE 80 1168 80 1088
WIRE 352 1168 352 720
WIRE 1184 1168 1184 832
FLAG -272 720 0
FLAG 64 544 0
FLAG 80 1168 0
FLAG 352 1168 0
FLAG 352 544 0
FLAG 1184 1168 0
FLAG -368 1168 0
SYMBOL LT1006 352 384 R0
SYMATTR InstName U2
SYMBOL voltage -272 592 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName LM35
SYMATTR Value PULSE(0 3 0 5 5 0 20)
SYMBOL res 48 256 R0
SYMATTR InstName R1
SYMATTR Value 33K
SYMBOL res 48 384 R0
SYMATTR InstName R2
SYMATTR Value 500
SYMBOL res 64 848 R0
SYMATTR InstName R3
SYMATTR Value 50K
SYMBOL res 64 992 R0
SYMATTR InstName R4
SYMATTR Value 500
SYMBOL voltage -368 896 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL LT1006 352 624 R0
SYMATTR InstName U3
SYMBOL diode 768 704 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMBOL diode 832 464 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMBOL res 1168 736 R0
SYMATTR InstName R5
SYMATTR Value 495
TEXT -400 1192 Left 2 !.tran 10