Version 4
SHEET 1 948 680
WIRE -1136 -16 -1312 -16
WIRE -1024 -16 -1136 -16
WIRE -800 -16 -1024 -16
WIRE -496 -16 -800 -16
WIRE -176 -16 -496 -16
WIRE -80 -16 -176 -16
WIRE 528 -16 -80 -16
WIRE 528 32 528 -16
WIRE 80 64 -448 64
WIRE 176 64 144 64
WIRE 320 64 256 64
WIRE 384 64 320 64
WIRE 464 64 384 64
WIRE -1136 80 -1136 -16
WIRE -1024 80 -1024 -16
WIRE -800 80 -800 -16
WIRE -80 96 -80 -16
WIRE -1744 112 -1904 112
WIRE -432 112 -464 112
WIRE -176 112 -176 -16
WIRE -176 112 -208 112
WIRE 464 128 464 64
WIRE 752 128 464 128
WIRE -1904 144 -1904 112
WIRE 320 144 320 64
WIRE 384 144 384 64
WIRE -1744 160 -1744 112
WIRE -1600 160 -1744 160
WIRE -1408 160 -1520 160
WIRE 528 160 528 112
WIRE 752 160 528 160
WIRE -1024 176 -1024 160
WIRE -928 176 -1024 176
WIRE -800 176 -800 160
WIRE -432 176 -800 176
WIRE -176 176 -208 176
WIRE -1024 192 -1024 176
WIRE -800 192 -800 176
WIRE -176 208 -176 176
WIRE -80 208 -80 176
WIRE -80 208 -176 208
WIRE -1408 240 -1408 160
WIRE -1392 240 -1408 240
WIRE -1136 240 -1136 160
WIRE -1136 240 -1328 240
WIRE -1088 240 -1136 240
WIRE -928 240 -928 176
WIRE -864 240 -928 240
WIRE -448 240 -448 64
WIRE -432 240 -448 240
WIRE -176 240 -176 208
WIRE -176 240 -208 240
WIRE -80 240 -80 208
WIRE -496 304 -496 -16
WIRE -432 304 -496 304
WIRE -1024 352 -1024 288
WIRE -912 352 -1024 352
WIRE -800 352 -800 288
WIRE -800 352 -912 352
WIRE -464 352 -464 112
WIRE -464 352 -800 352
WIRE -80 352 -80 304
WIRE -80 352 -464 352
WIRE 320 352 320 224
WIRE 320 352 -80 352
WIRE 384 352 384 208
WIRE 384 352 320 352
WIRE 528 352 528 240
WIRE 528 352 384 352
WIRE -912 384 -912 352
FLAG -912 384 0
FLAG -1312 64 0
FLAG -1904 224 0
SYMBOL Misc\\NE555 -320 208 R0
SYMATTR InstName U1
SYMBOL npn -1088 192 R0
SYMATTR InstName Q1
SYMBOL npn -864 192 R0
SYMATTR InstName Q2
SYMBOL res -1120 176 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res -1008 176 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res -784 176 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL res -1616 176 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL cap -1328 224 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap -96 240 R0
SYMATTR InstName C2
SYMATTR Value 10µ
SYMBOL res -96 80 R0
SYMATTR InstName R6
SYMATTR Value 47k
SYMBOL diode 80 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMBOL res 272 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL res 336 240 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R8
SYMATTR Value 47k
SYMBOL cap 368 144 R0
SYMATTR InstName C3
SYMATTR Value 100µ
SYMBOL res 512 16 R0
SYMATTR InstName R9
SYMATTR Value 100k
SYMBOL res 512 144 R0
SYMATTR InstName R10
SYMATTR Value 10k
SYMBOL voltage -1312 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 9
SYMBOL voltage -1904 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 4 1k 10 0 0 22000)
TEXT -1938 408 Left 2 !.tran 0 100 0ms