Version 4
SHEET 1 880 680
WIRE 32 0 -224 0
WIRE 336 0 32 0
WIRE 480 0 336 0
WIRE 32 16 32 0
WIRE 336 16 336 0
WIRE 480 144 480 0
WIRE -224 176 -224 64
WIRE 32 176 32 96
WIRE 32 176 -96 176
WIRE 144 176 32 176
WIRE 336 176 336 80
WIRE -224 304 -224 256
WIRE -160 304 -224 304
WIRE -96 304 -96 256
WIRE 144 304 144 256
WIRE 336 304 336 256
WIRE 336 304 208 304
WIRE 480 320 480 224
WIRE 336 384 336 304
WIRE -224 400 -224 304
WIRE 272 432 -96 304
WIRE -160 448 144 304
WIRE -224 528 -224 496
WIRE 336 528 336 480
WIRE 336 528 -224 528
WIRE 480 528 480 320
WIRE 480 528 336 528
FLAG 480 320 0
SYMBOL voltage 480 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 9
SYMBOL res 16 0 R0
SYMATTR InstName R1
SYMATTR Value 50k
SYMBOL res -112 160 R0
SYMATTR InstName R2
SYMATTR Value 3.9k
SYMBOL res 128 160 R0
SYMATTR InstName R3
SYMATTR Value 3.9k
SYMBOL res 320 160 R0
SYMATTR InstName R4
SYMATTR Value 470
SYMBOL res -240 160 R0
SYMATTR InstName R5
SYMATTR Value 470
SYMBOL LED -240 0 R0
SYMATTR InstName D1
SYMATTR Value NSCW100
SYMBOL LED 320 16 R0
SYMATTR InstName D2
SYMATTR Value NSCW100
SYMBOL cap -96 288 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 47µ
SYMBOL cap 208 288 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 47µ
SYMBOL npn 272 384 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL npn -160 400 M0
SYMATTR InstName Q2
SYMATTR Value BC547B
TEXT -320 538 Left 2 !.tran 20