Version 4 SHEET 1 968 680 WIRE 272 -96 64 -96 WIRE 400 -96 336 -96 WIRE 400 -64 400 -96 WIRE 144 -48 64 -48 WIRE 256 -48 144 -48 WIRE 256 -16 256 -48 WIRE -368 48 -384 48 WIRE -336 48 -368 48 WIRE -240 48 -256 48 WIRE 144 64 144 -48 WIRE 400 64 400 16 WIRE 528 64 400 64 WIRE -368 96 -368 48 WIRE 272 112 208 112 WIRE 464 112 352 112 WIRE 736 128 720 128 WIRE 736 144 736 128 WIRE 400 176 400 64 WIRE 48 192 0 192 WIRE 144 192 144 160 WIRE 144 192 48 192 WIRE 368 192 144 192 WIRE 464 208 464 112 WIRE 464 208 432 208 WIRE 256 224 256 64 WIRE 368 224 256 224 WIRE 0 240 0 192 WIRE 256 256 256 224 WIRE 736 256 736 224 WIRE 752 256 736 256 WIRE 528 272 528 64 WIRE 736 288 736 256 WIRE 0 384 0 320 WIRE 256 384 256 336 WIRE 256 384 0 384 WIRE 400 384 400 240 WIRE 400 384 256 384 WIRE 528 384 528 336 WIRE 528 384 400 384 WIRE 736 400 736 368 WIRE 0 416 0 384 FLAG 0 416 0 FLAG 736 400 0 FLAG 752 256 ref FLAG 64 -48 gauge FLAG 64 -96 V+ FLAG 48 192 sender FLAG -368 176 0 FLAG -384 48 V+ FLAG -240 48 gauge FLAG 720 128 V+ SYMBOL voltage -368 80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL Opamps\\LM358 400 144 R0 SYMATTR InstName U1 SYMBOL res -16 224 R0 WINDOW 0 -126 48 Left 2 SYMATTR InstName TempSender SYMATTR Value {r} SYMBOL res 240 -32 R0 WINDOW 0 40 53 Left 2 WINDOW 3 44 76 Left 2 SYMATTR InstName R1 SYMATTR Value 20k SYMBOL res 240 240 R0 SYMATTR InstName R2 SYMATTR Value 10k SYMBOL npn 208 64 M0 WINDOW 0 28 -18 Left 2 WINDOW 3 36 44 Left 2 SYMATTR InstName Q1 SYMATTR Value 2N2222 SYMBOL res -240 32 R90 WINDOW 0 -11 57 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName Rgauge SYMATTR Value 50 SYMBOL res 368 96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 330 SYMBOL res 720 128 R0 SYMATTR InstName R4 SYMATTR Value 50 SYMBOL res 720 272 R0 WINDOW 0 49 49 Left 2 WINDOW 3 -55 63 Left 2 SYMATTR InstName FuelSender SYMATTR Value {3*r} SYMBOL res 416 32 R180 WINDOW 0 44 74 Left 2 WINDOW 3 45 45 Left 2 SYMATTR InstName R5 SYMATTR Value 33 SYMBOL polcap 512 272 R0 WINDOW 0 -44 21 Left 2 WINDOW 3 -50 47 Left 2 SYMATTR InstName C1 SYMATTR Value 100µ SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=25 Irms=795m Rser=0.085 Lser=0 SYMBOL diode 272 -112 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value 1N4004 TEXT -400 232 Left 2 !.step param r 30 150 5 TEXT -400 264 Left 2 !.op TEXT -152 304 Left 2 ;30-150 Ohm TEXT 768 344 Left 2 ;90-450 Ohm TEXT 680 80 Left 2 ;Reference TEXT 456 -120 Left 2 ;Adapter TEXT 56 448 Left 2 ;R2/(R1+R2) = TempSender resistance / FuelSender resistance LINE Normal 208 416 96 416 1 LINE Normal 96 416 96 240 1 LINE Normal 512 416 208 416 1 LINE Normal 96 -128 96 240 1 LINE Normal 96 -144 96 -128 1 LINE Normal 576 -144 96 -144 1 LINE Normal 576 416 576 -144 1 LINE Normal 512 416 576 416 1