Version 4
SHEET 1 880 680
WIRE 256 -32 -16 -32
WIRE 416 -32 256 -32
WIRE 416 -16 416 -32
WIRE 256 16 256 -32
WIRE 416 80 416 48
WIRE -16 112 -16 -32
WIRE 112 176 80 176
WIRE 288 176 192 176
WIRE 416 176 416 160
WIRE 416 176 352 176
WIRE 416 224 416 176
WIRE 80 272 80 176
WIRE 112 272 80 272
WIRE 256 272 256 96
WIRE 256 272 192 272
WIRE 352 272 256 272
WIRE 256 288 256 272
WIRE 80 336 80 272
WIRE 192 336 80 336
WIRE -16 416 -16 192
WIRE 256 416 256 384
WIRE 256 416 -16 416
WIRE 416 416 416 320
WIRE 416 416 256 416
WIRE -16 448 -16 416
FLAG -16 448 0
SYMBOL voltage -16 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 9V
SYMBOL LED 400 -16 R0
SYMATTR InstName D1
SYMATTR Value NSCW100
SYMBOL Misc\\EuropeanResistor 400 64 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor 240 0 R0
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL Misc\\EuropeanResistor 208 160 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor 208 256 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 22k
SYMBOL npn 192 288 R0
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL npn 352 224 R0
SYMATTR InstName Q2
SYMATTR Value BC547C
SYMBOL Misc\\EuropeanCap 352 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10µ
TEXT -50 472 Left 2 !.tran 5