Version 4
SHEET 1 2548 680
WIRE 640 -368 -144 -368
WIRE 144 -336 32 -336
WIRE 224 -336 144 -336
WIRE 304 -336 224 -336
WIRE 384 -336 304 -336
WIRE 144 -320 144 -336
WIRE 224 -320 224 -336
WIRE 304 -320 304 -336
WIRE 384 -320 384 -336
WIRE 32 -304 32 -336
WIRE 640 -144 640 -368
WIRE 144 -128 144 -160
WIRE 224 -128 224 -160
WIRE 304 -128 304 -160
WIRE 384 -128 384 -160
WIRE -144 -80 -144 -368
WIRE -128 -80 -144 -80
WIRE 144 -16 144 -64
WIRE 224 -16 224 -64
WIRE 224 -16 144 -16
WIRE 304 -16 304 -64
WIRE 304 -16 224 -16
WIRE 384 -16 384 -64
WIRE 384 -16 304 -16
WIRE 480 -16 384 -16
WIRE 384 32 384 -16
WIRE 640 32 640 -80
WIRE 480 80 480 -16
WIRE 480 80 448 80
WIRE 576 80 480 80
WIRE -128 128 -128 -80
WIRE -128 240 -128 208
WIRE 384 240 384 128
WIRE 640 240 640 128
WIRE 384 336 384 320
WIRE 640 336 640 320
FLAG -128 240 0
FLAG 384 336 0
FLAG 640 336 0
FLAG 32 -304 0
SYMBOL voltage -128 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL npn 576 32 R0
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL npn 448 32 M0
SYMATTR InstName Q2
SYMATTR Value BC547C
SYMBOL res 368 -256 R0
SYMATTR InstName R2
SYMATTR Value 4800
SYMBOL res 368 224 R0
SYMATTR InstName R3
SYMATTR Value 100
SYMBOL res 624 224 R0
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL res 288 -256 R0
SYMATTR InstName R7
SYMATTR Value 2400
SYMBOL res 208 -256 R0
SYMATTR InstName R8
SYMATTR Value 1200
SYMBOL res 128 -256 R0
SYMATTR InstName R9
SYMATTR Value 600
SYMBOL voltage 144 -224 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -362 309 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 5 8e-3 1e-9 1e-9 8e-3 16e-3)
SYMBOL voltage 224 -224 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -264 277 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 4e-3 1e-9 1e-9 4e-3 8e-3)
SYMBOL voltage 304 -224 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -188 251 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 5 2e-3 1e-9 1e-9 2e-3 4e-3)
SYMBOL voltage 384 -224 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -105 226 Left 2
SYMATTR InstName V5
SYMATTR Value PULSE(0 5 1e-3 1e-9 1e-9 1e-3 2e-3)
SYMBOL diode 128 -128 R0
WINDOW 3 -124 39 Left 2
SYMATTR InstName D3
SYMATTR Value IdealDiode
SYMBOL diode 208 -128 R0
WINDOW 3 -63 68 Left 2
SYMATTR InstName D4
SYMATTR Value IdealDiode
SYMBOL diode 288 -128 R0
WINDOW 3 2 69 Left 2
SYMATTR InstName D5
SYMATTR Value IdealDiode
SYMBOL diode 368 -128 R0
WINDOW 3 50 36 Left 2
SYMATTR InstName D6
SYMATTR Value IdealDiode
SYMBOL LED 624 -144 R0
SYMATTR InstName D1
SYMATTR Value QTLP690C
TEXT -32 264 Left 2 !.tran 0 20e-3 0 10e-7