Version 4
SHEET 1 880 680
WIRE 304 32 48 32
WIRE 496 32 304 32
WIRE 64 64 16 64
WIRE 304 64 304 32
WIRE 304 64 288 64
WIRE 336 64 304 64
WIRE 448 64 416 64
WIRE 64 128 32 128
WIRE 320 128 288 128
WIRE 448 128 448 64
WIRE 448 128 400 128
WIRE 496 144 496 32
WIRE 64 192 0 192
WIRE 304 192 288 192
WIRE 368 192 304 192
WIRE 448 192 448 128
WIRE 448 192 368 192
WIRE 448 208 448 192
WIRE 48 256 48 32
WIRE 64 256 48 256
WIRE 320 256 288 256
WIRE 384 256 368 256
WIRE 320 272 320 256
WIRE 32 288 32 128
WIRE 304 288 304 192
WIRE 304 288 32 288
WIRE 368 288 368 256
WIRE 0 336 0 192
WIRE 80 336 0 336
WIRE 16 368 16 64
WIRE 320 368 320 336
WIRE 320 368 16 368
WIRE 368 368 368 352
WIRE 368 368 320 368
WIRE 448 368 448 304
WIRE 448 368 368 368
WIRE 496 368 496 224
WIRE 496 368 448 368
WIRE 448 384 448 368
FLAG 448 384 0
FLAG 80 336 Out
IOPIN 80 336 Out
SYMBOL Robertugo\\555_all 224 176 R0
SYMATTR InstName U1
SYMBOL cap 304 272 R0
WINDOW 0 -39 33 Left 0
WINDOW 3 -39 61 Left 0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL res 416 112 R90
WINDOW 0 16 109 VBottom 0
WINDOW 3 -12 17 VTop 0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 432 48 R90
WINDOW 0 16 109 VBottom 0
WINDOW 3 -12 15 VTop 0
SYMATTR InstName R2
SYMATTR Value 1e7
SYMBOL pnp2 384 304 M180
WINDOW 0 3 97 Left 0
WINDOW 3 19 48 Left 0
SYMATTR InstName Q1
SYMATTR Value BC557C
SYMBOL cap 352 288 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL diode 384 256 R180
WINDOW 0 39 33 Left 0
WINDOW 3 24 0 Invisible 0
SYMATTR InstName D1
SYMATTR Value 1N914
SYMBOL voltage 496 128 R0
WINDOW 0 -44 9 Left 0
WINDOW 3 -7 59 Left 0
SYMATTR InstName Vcc
SYMATTR Value 5
TEXT 0 416 Left 0 !.tran 3600