Version 4
SHEET 1 880 680
WIRE 160 -64 32 -64
WIRE 224 -64 160 -64
WIRE 288 -64 224 -64
WIRE 400 -64 288 -64
WIRE 32 -48 32 -64
WIRE 400 -48 400 -64
WIRE 32 48 32 16
WIRE 160 48 160 -64
WIRE 288 48 288 -64
WIRE 400 48 400 16
WIRE 32 176 32 128
WIRE 64 176 32 176
WIRE 160 176 160 128
WIRE 160 176 128 176
WIRE 288 176 288 128
WIRE 320 176 288 176
WIRE 400 176 400 128
WIRE 400 176 384 176
WIRE -64 208 -64 192
WIRE 32 256 32 176
WIRE 400 256 400 176
WIRE 32 400 32 352
WIRE 400 400 400 352
FLAG -64 208 0
FLAG 32 400 0
FLAG 400 400 0
FLAG -64 112 +UB
FLAG 224 -64 +UB
FLAG 288 176 B_T1
FLAG 96 304 B_T1
FLAG 160 176 B_T2
FLAG 336 304 B_T2
SYMBOL res 16 32 R0
SYMATTR InstName R1
SYMATTR Value 470
SYMBOL res 144 32 R0
SYMATTR InstName R2
SYMATTR Value 47k
SYMBOL res 272 32 R0
SYMATTR InstName R3
SYMATTR Value 47k
SYMBOL res 384 32 R0
SYMATTR InstName R4
SYMATTR Value 470
SYMBOL cap 128 192 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL voltage -64 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 9
SYMBOL cap 384 192 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 10µ
SYMBOL npn 96 256 M0
WINDOW 0 57 30 Left 2
SYMATTR InstName Q1
SYMATTR Value BC548A
SYMBOL npn 336 256 R0
SYMATTR InstName Q2
SYMATTR Value BC548A
SYMBOL LED 16 -48 R0
SYMATTR InstName D1
SYMBOL LED 416 -48 M0
SYMATTR InstName D2
TEXT -80 368 Left 2 !.tran 30