Version 4 SHEET 1 880 680 WIRE -176 -80 -288 -80 WIRE 32 -80 -96 -80 WIRE 128 -80 32 -80 WIRE 320 -80 128 -80 WIRE 128 -64 128 -80 WIRE 32 -16 32 -80 WIRE 128 32 128 16 WIRE 320 64 320 -80 WIRE -288 80 -288 -80 WIRE -208 80 -288 80 WIRE -48 80 -128 80 WIRE -288 112 -288 80 WIRE -288 112 -336 112 WIRE -48 112 -48 80 WIRE 112 112 -48 112 WIRE 128 112 112 112 WIRE 160 112 128 112 WIRE 256 112 240 112 WIRE -608 128 -752 128 WIRE -528 128 -608 128 WIRE -752 160 -752 128 WIRE -608 160 -608 128 WIRE -800 176 -864 176 WIRE -288 176 -288 112 WIRE -192 176 -288 176 WIRE -48 176 -48 112 WIRE -48 176 -128 176 WIRE 320 192 320 160 WIRE -864 208 -864 176 WIRE 128 208 128 112 WIRE -608 256 -608 240 WIRE -320 288 -352 288 WIRE -208 288 -240 288 WIRE -112 288 -208 288 WIRE 32 288 32 48 WIRE 32 288 -32 288 WIRE 64 288 32 288 WIRE 80 288 64 288 WIRE -864 304 -864 288 WIRE -800 304 -800 224 WIRE -800 304 -864 304 WIRE -208 304 -208 288 WIRE -864 320 -864 304 WIRE 128 336 128 304 WIRE -752 384 -752 240 WIRE -528 384 -752 384 WIRE -208 416 -208 384 FLAG 128 336 0 FLAG -608 256 0 FLAG -336 112 12V IOPIN -336 112 In FLAG -352 288 S2 IOPIN -352 288 In FLAG -864 320 0 FLAG -528 384 S2 IOPIN -528 384 Out FLAG -528 128 12V IOPIN -528 128 Out FLAG 112 112 d FLAG 64 288 g FLAG 320 192 0 FLAG -208 416 0 FLAG 128 32 0 SYMBOL ind -224 96 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 Invisible 2 SYMATTR InstName L1 SYMATTR Value 1µ SYMATTR SpiceLine Rser=85 SYMBOL diode -128 160 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL nmos 80 208 R0 WINDOW 3 56 72 Invisible 2 SYMATTR InstName M1 SYMATTR Value IPB011N04N SYMBOL sw -752 256 M180 SYMATTR InstName S2 SYMATTR Value Contact SYMBOL voltage -864 192 M0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value PULSE(-1 1 10 1u 1u 140) SYMBOL res -128 272 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 34 54 VTop 2 SYMATTR InstName R1 SYMATTR Value 1meg SYMBOL polcap 48 48 R180 WINDOW 0 24 57 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C1 SYMATTR Value 56µF SYMBOL Misc\\battery -608 144 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL res 256 96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 47K SYMBOL npn 256 64 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL res 112 -80 R0 SYMATTR InstName R5 SYMATTR Value 6.8K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL res -224 288 R0 SYMATTR InstName R2 SYMATTR Value 1K SYMBOL res -80 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 10K SYMBOL res -224 272 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 220 TEXT -168 0 Center 2 ;12Vdc 85 Ohm \nAutomotive Relay TEXT -1120 336 Left 2 !.model contact sw() TEXT -1112 376 Left 2 !.tran 200 startup TEXT 176 280 Center 2 ;NMOS\nVth >4 TEXT -88 352 Left 2 ;Pot TEXT -1136 152 Left 2 ;Simulation Only RECTANGLE Normal -544 432 -1168 96 2 RECTANGLE Normal -16 384 -128 240 2 RECTANGLE Normal -64 128 -272 -32 2