Version 4
SHEET 1 956 680
WIRE 624 -224 624 -320
WIRE 80 -192 80 -224
WIRE 384 -160 384 -320
WIRE 320 -112 320 -320
WIRE 624 -96 624 -144
WIRE 848 -96 624 -96
WIRE 80 -80 80 -112
WIRE 624 -16 624 -96
WIRE 672 -16 624 -16
WIRE 784 -16 752 -16
WIRE 624 48 624 -16
WIRE 256 96 256 -320
WIRE 288 96 256 96
WIRE 384 96 384 -64
WIRE 384 96 368 96
WIRE 464 96 384 96
WIRE 560 96 528 96
WIRE 384 160 384 96
WIRE 384 288 384 224
WIRE 624 288 624 144
WIRE 784 288 784 -16
FLAG 80 -80 0
FLAG 80 -224 T
FLAG 624 288 0
FLAG 384 288 0
FLAG 256 -320 T
FLAG 624 -320 T
FLAG 848 -96 Out
IOPIN 848 -96 Out
FLAG 784 288 0
FLAG 384 -320 T
FLAG 320 -320 T
SYMBOL voltage 80 -208 R0
WINDOW 3 70 -86 VRight 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 16.5 0.01 1n 1n 0.5 1 2)
SYMATTR InstName V2
SYMBOL npn 560 48 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL res 608 -240 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL cap 368 160 R0
SYMATTR InstName C1
SYMATTR Value 5µ
SYMBOL res 272 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL zener 528 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value BZX84C10L
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 656 0 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 22k
SYMBOL pnp 320 -64 M180
SYMATTR InstName Q2
TEXT 32 144 Left 2 !.tran 0 2.01 0 1m
TEXT 440 -384 Left 2 ;RC-Timer