Version 4
SHEET 1 880 680
WIRE -272 -128 -368 -128
WIRE -224 -128 -272 -128
WIRE -144 -128 -224 -128
WIRE -64 -128 -144 -128
WIRE 32 -128 -64 -128
WIRE 96 -128 32 -128
WIRE 368 -128 96 -128
WIRE 416 -128 368 -128
WIRE -368 -112 -368 -128
WIRE -144 -112 -144 -128
WIRE 96 -112 96 -128
WIRE -272 -96 -272 -128
WIRE -224 -96 -224 -128
WIRE -272 -32 -368 -32
WIRE -224 -32 -272 -32
WIRE 96 -16 96 -32
WIRE -224 16 -224 -32
WIRE -64 16 -64 -128
WIRE 112 32 80 32
WIRE 368 32 368 -128
WIRE 368 32 336 32
WIRE 80 48 80 32
WIRE -144 64 -144 -48
WIRE -144 64 -160 64
WIRE -128 64 -144 64
WIRE 112 96 80 96
WIRE 400 96 336 96
WIRE 496 96 400 96
WIRE -144 128 -144 64
WIRE -64 128 -64 112
WIRE -64 128 -144 128
WIRE 112 160 -16 160
WIRE 368 160 336 160
WIRE 432 160 432 144
WIRE -64 176 -64 128
WIRE 32 224 32 -128
WIRE 112 224 32 224
WIRE 432 224 336 224
WIRE 496 240 496 96
WIRE -64 272 -64 256
WIRE 80 320 80 96
WIRE 368 320 368 160
WIRE 368 320 80 320
WIRE 496 320 368 320
WIRE -224 352 -224 112
WIRE 400 352 400 96
WIRE 400 352 -224 352
WIRE 112 416 112 384
WIRE 32 464 16 464
WIRE 272 464 192 464
WIRE -16 512 -16 160
WIRE 32 512 -16 512
WIRE 224 512 208 512
WIRE 224 544 224 512
WIRE 272 544 224 544
WIRE 112 576 112 560
WIRE 16 608 16 464
WIRE 224 608 224 544
WIRE 224 608 16 608
FLAG 80 48 0
FLAG 496 384 0
FLAG -64 272 0
FLAG 96 -16 0
FLAG 432 144 0
FLAG 112 576 0
FLAG 112 384 0
FLAG 416 -64 0
SYMBOL Misc\\NE555 224 128 R0
SYMATTR InstName U1
SYMBOL voltage 96 -128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL pnp -160 112 R180
WINDOW 0 57 36 Left 2
WINDOW 3 55 70 Left 2
SYMATTR InstName Q1
SYMATTR Value 2N3906
SYMBOL pnp -128 112 M180
WINDOW 0 60 38 Left 2
WINDOW 3 57 67 Left 2
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL diode -240 -96 R0
SYMATTR InstName D1
SYMBOL diode -256 -32 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMBOL cap -160 -112 R0
SYMATTR InstName C1
SYMATTR Value 0.1µ
SYMBOL cap 480 320 R0
SYMATTR InstName C2
SYMATTR Value 0.047µ
SYMBOL res 480 224 R0
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL res -80 160 R0
WINDOW 0 -35 35 Left 2
WINDOW 3 -44 70 Left 2
SYMATTR InstName R2
SYMATTR Value 20k
SYMBOL cap 416 160 R0
SYMATTR InstName C3
SYMATTR Value 0.1µ
SYMBOL Digital\\dflop 112 416 R0
SYMATTR InstName A1_74HC74
SYMBOL res -384 -128 R0
WINDOW 0 -3 123 Left 2
WINDOW 3 -2 152 Left 2
SYMATTR InstName R4_Test_Pin
SYMATTR Value 50k
SYMBOL res 256 448 R0
SYMATTR InstName R5_buzzer
SYMATTR Value 1
SYMBOL cap 400 -128 R0
SYMATTR InstName C4
SYMATTR Value 0.1µ
TEXT -360 536 Left 2 !.tran 1 startup