Version 4
SHEET 1 1052 680
WIRE 288 -80 -544 -80
WIRE 560 -80 288 -80
WIRE 288 -48 288 -80
WIRE 560 16 560 -80
WIRE 272 64 -80 64
WIRE 288 64 288 32
WIRE 288 64 272 64
WIRE 352 64 288 64
WIRE 496 64 432 64
WIRE -80 128 -80 64
WIRE -320 176 -416 176
WIRE -144 176 -240 176
WIRE -544 192 -544 -80
WIRE 272 288 272 64
WIRE -416 336 -416 176
WIRE 80 336 -16 336
WIRE 208 336 160 336
WIRE -16 384 -16 336
WIRE 560 448 560 112
WIRE 768 448 560 448
WIRE 832 448 768 448
WIRE 560 464 560 448
WIRE 832 464 832 448
WIRE -544 576 -544 272
WIRE -416 576 -416 416
WIRE -416 576 -544 576
WIRE -80 576 -80 224
WIRE -80 576 -416 576
WIRE -16 576 -16 464
WIRE -16 576 -80 576
WIRE 48 576 -16 576
WIRE 272 576 272 384
WIRE 272 576 48 576
WIRE 560 576 560 544
WIRE 560 576 272 576
WIRE 832 576 832 544
WIRE 832 576 560 576
WIRE 48 592 48 576
FLAG 48 592 0
FLAG 768 448 OUT
SYMBOL npn -144 128 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL npn 208 288 R0
SYMATTR InstName Q2
SYMATTR Value BC547B
SYMBOL res 544 448 R0
SYMATTR InstName R1
SYMATTR Value 4k7
SYMBOL res -224 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 200k
SYMBOL res 176 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 39k
SYMBOL voltage -544 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 24V
SYMBOL voltage -416 320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 24V 0 0 0 10ms 20ms)
SYMBOL voltage -16 368 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 0 0 0 20ms 40ms)
SYMBOL pnp 496 112 M180
SYMATTR InstName Q3
SYMATTR Value BC557B
SYMBOL res 272 -64 R0
SYMATTR InstName R4
SYMATTR Value 4k7
SYMBOL res 448 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 47k
SYMBOL res 816 448 R0
SYMATTR InstName R6
SYMATTR Value 4800
TEXT 776 8 Left 2 !;dc V2 0V 24V 100mV
TEXT 768 48 Left 2 !.tran 100ms