Version 4
SHEET 1 880 680
WIRE 352 -96 80 -96
WIRE 480 -96 352 -96
WIRE 608 -96 480 -96
WIRE 80 -64 80 -96
WIRE 480 -32 480 -96
WIRE 432 -16 352 -16
WIRE 352 96 352 -16
WIRE 480 112 480 64
WIRE 592 112 480 112
WIRE 240 144 224 144
WIRE 288 144 240 144
WIRE 224 176 224 144
FLAG 352 272 0
FLAG 224 256 0
FLAG 80 16 0
FLAG 592 192 0
FLAG 240 144 Arduino
SYMBOL voltage 80 -80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage 224 160 R0
WINDOW 3 -43 152 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 -43 180 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 10n 10n 20µ 40µ)
SYMATTR SpiceLine Rser=50
SYMBOL npn 288 96 R0
SYMATTR InstName Q1
SYMATTR Value BC846B
SYMBOL res 336 176 R0
SYMATTR InstName R1
SYMATTR Value 220
SYMBOL pmos 432 64 M180
SYMATTR InstName M1
SYMATTR Value Si7461DP
SYMBOL res 336 -112 R0
SYMATTR InstName R2
SYMATTR Value 470
SYMBOL res 576 96 R0
SYMATTR InstName R3
SYMATTR Value 2
TEXT 46 360 Left 2 !.tran 1m