Version 4
SHEET 1 880 680
WIRE 176 96 96 96
WIRE 240 96 176 96
WIRE 400 96 336 96
WIRE 496 96 400 96
WIRE 544 96 496 96
WIRE 96 144 96 96
WIRE 256 176 256 144
WIRE 256 176 176 176
WIRE 256 240 256 176
WIRE 368 288 320 288
WIRE 480 288 448 288
WIRE 512 288 480 288
FLAG 256 336 0
FLAG 96 224 0
FLAG 512 368 0
FLAG 400 176 0
FLAG 496 96 switched
FLAG 480 288 ctrl
SYMBOL Misc\\battery 96 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL pmos 336 144 M270
SYMATTR InstName M1
SYMATTR Value IRF7404
SYMBOL res 160 80 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL npn 320 240 M0
SYMATTR InstName Q1
SYMATTR Value BC847B
SYMBOL res 464 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL voltage 512 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 10n 10n 1 2)
SYMATTR SpiceLine Rser=30
SYMBOL res 384 80 R0
SYMATTR InstName R3
SYMATTR Value 100
TEXT 456 136 Left 2 ;Last
TEXT 552 328 Left 2 ;Port
TEXT 62 416 Left 2 !.tran 5