Version 4
SHEET 1 984 680
WIRE 304 -96 224 -96
WIRE 352 -96 304 -96
WIRE 496 -96 352 -96
WIRE 736 -96 496 -96
WIRE 816 -96 736 -96
WIRE 896 -96 816 -96
WIRE 976 -96 896 -96
WIRE 352 -64 352 -96
WIRE 496 -64 496 -96
WIRE 304 16 304 -32
WIRE 352 16 304 16
WIRE 608 64 416 64
WIRE 688 64 608 64
WIRE 736 64 736 48
WIRE 736 64 688 64
WIRE 816 64 816 48
WIRE 816 64 736 64
WIRE 896 64 896 48
WIRE 896 64 816 64
WIRE 976 64 896 64
WIRE 224 128 224 -96
WIRE 608 128 608 64
WIRE 496 176 496 16
WIRE 544 176 496 176
WIRE 352 224 352 112
WIRE 432 224 352 224
WIRE 352 240 352 224
FLAG 224 208 0
FLAG 496 272 0
FLAG 352 320 0
FLAG 608 224 0
FLAG 688 128 0
SYMBOL voltage 224 112 R0
WINDOW 3 -266 38 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(2 5 0 10 10 0 20)
SYMATTR InstName V1
SYMBOL npn 432 176 R0
WINDOW 3 52 59 Left 2
SYMATTR Value BC337-40
SYMATTR InstName Q1
SYMBOL npn 544 128 R0
SYMATTR InstName Q2
SYMATTR Value BC337-40
SYMBOL res 480 -80 R0
SYMATTR InstName R1
SYMATTR Value 2k7
SYMBOL res 720 -48 R0
SYMATTR InstName R2
SYMATTR Value 47
SYMBOL res 336 224 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL pnp 416 112 R180
SYMATTR InstName Q3
SYMATTR Value BC557B
SYMBOL res 336 -80 R0
SYMATTR InstName R5
SYMATTR Value 2k7
SYMBOL LED 720 -96 R0
WINDOW 3 -41 -28 Left 2
SYMATTR InstName D1
SYMATTR Value QTLP690C
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 800 -48 R0
SYMATTR InstName R4
SYMATTR Value 47
SYMBOL res 880 -48 R0
SYMATTR InstName R6
SYMATTR Value 47
SYMBOL cap 288 -96 R0
SYMATTR InstName C3
SYMATTR Value 10n
SYMBOL cap 672 64 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL LED 800 -96 R0
WINDOW 3 -41 -48 Left 2
SYMATTR InstName D2
SYMATTR Value QTLP690C
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL LED 880 -96 R0
WINDOW 3 -41 -28 Left 2
SYMATTR InstName D3
SYMATTR Value QTLP690C
SYMATTR Description Diode
SYMATTR Type diode
TEXT 192 232 Left 2 !.tran 20