Version 4
SHEET 1 880 680
WIRE 736 -112 48 -112
WIRE 464 -48 0 -48
WIRE 112 80 80 80
WIRE 544 80 336 80
WIRE 736 80 736 -112
WIRE 736 80 544 80
WIRE 736 96 736 80
WIRE 80 112 80 80
WIRE 544 112 544 80
WIRE 0 144 0 -48
WIRE 112 144 0 144
WIRE 496 144 336 144
WIRE 112 208 0 208
WIRE 464 208 464 -48
WIRE 464 208 336 208
WIRE 496 208 496 144
WIRE 544 208 544 192
WIRE 544 208 496 208
WIRE 544 224 544 208
WIRE 736 240 736 176
WIRE 0 256 0 208
WIRE 48 272 48 -112
WIRE 112 272 48 272
WIRE 400 272 336 272
WIRE 464 336 464 208
WIRE 544 336 544 304
WIRE 544 336 464 336
WIRE 544 352 544 336
WIRE 0 368 0 336
WIRE 400 400 400 272
WIRE 544 464 544 416
WIRE 400 496 400 464
FLAG 544 464 0
FLAG 400 496 0
FLAG 0 368 0
FLAG 80 112 0
FLAG 736 240 0
FLAG 544 336 Vc
SYMBOL Misc\\NE555 224 176 R0
SYMATTR InstName U1
SYMBOL res 528 96 R0
SYMATTR InstName R1
SYMATTR Value 5k
SYMBOL res 528 208 R0
SYMATTR InstName R2
SYMATTR Value 5k
SYMBOL res -16 240 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL cap 528 352 R0
SYMATTR InstName C1
SYMATTR Value 144µ
SYMBOL cap 384 400 R0
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL voltage 736 80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 9
TEXT 160 344 Left 2 !.tran 10
TEXT 160 376 Left 2 !.ic V(Vc) = 0