Version 4
SHEET 1 1132 680
WIRE 992 -368 800 -368
WIRE 800 -272 800 -368
WIRE 992 -112 992 -368
WIRE 800 -16 800 -208
WIRE -32 32 -304 32
WIRE 192 32 48 32
WIRE 272 32 192 32
WIRE 432 32 352 32
WIRE 592 32 432 32
WIRE 736 32 592 32
WIRE 592 96 592 32
WIRE -304 128 -304 32
WIRE 192 128 192 32
WIRE 432 144 432 32
WIRE -16 192 -80 192
WIRE 144 192 64 192
WIRE 368 192 240 192
WIRE -80 256 -80 192
WIRE -304 304 -304 208
WIRE 432 320 432 240
WIRE 592 320 592 160
WIRE 800 320 800 80
WIRE 992 320 992 -48
FLAG -80 256 0
FLAG 432 320 0
FLAG -304 304 0
FLAG 800 320 0
FLAG 592 320 0
FLAG 992 320 0
SYMBOL npn 144 128 M90
SYMATTR InstName Q1
SYMATTR Value BC847C
SYMBOL npn 368 240 M180
SYMATTR InstName Q2
SYMATTR Value BC547B
SYMBOL res 64 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10
SYMBOL res 368 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10
SYMBOL res 80 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL voltage -304 112 R0
WINDOW 3 -152 266 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 5 0 100n 100n 1u 2u)
SYMBOL diode 608 160 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL npn 736 -16 R0
SYMATTR InstName Q3
SYMATTR Value 2N5550
SYMBOL LED 784 -272 R0
SYMATTR InstName D2
SYMATTR Value NSCW100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 976 -112 R0
SYMATTR InstName C1
SYMATTR Value 100µ IC=5
TEXT -458 398 Left 2 !.tran 2u