Version 4
SHEET 1 880 680
WIRE -32 0 -128 0
WIRE 144 0 -32 0
WIRE 256 0 144 0
WIRE 448 0 256 0
WIRE -128 112 -128 64
WIRE 144 112 144 80
WIRE 144 112 -48 112
WIRE 256 112 256 64
WIRE 256 112 144 112
WIRE -128 176 -128 112
WIRE 448 176 448 0
WIRE 144 208 144 112
WIRE -32 256 -32 80
WIRE -32 256 -48 256
WIRE 80 256 -32 256
WIRE -128 304 -128 256
WIRE -96 304 -128 304
WIRE -32 384 -32 352
WIRE -32 384 -128 384
WIRE 144 384 144 304
WIRE 144 384 -32 384
WIRE 448 384 448 256
WIRE 448 384 144 384
WIRE 144 400 144 384
FLAG 144 400 0
SYMBOL voltage 448 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(1.25 0.25 1)
SYMBOL res -48 -16 R0
WINDOW 3 41 64 Left 2
SYMATTR InstName R1
SYMATTR Value 15
SYMBOL res -144 160 R0
WINDOW 3 -33 46 Left 2
SYMATTR InstName R2
SYMATTR Value 470
SYMBOL res -32 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 470
SYMBOL res -144 288 R0
WINDOW 0 28 61 Left 2
WINDOW 3 -18 65 Left 2
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL ind 128 -16 R0
WINDOW 3 -30 43 Left 2
SYMATTR InstName L1
SYMATTR Value 100µ
SYMATTR SpiceLine Ipk=0.28 Rser=2.85 Rpar=86116.4 Cpar=0 mfg="Bourns, Inc." pn="SDR0302-101KL"
SYMBOL npn -96 256 R0
SYMATTR InstName Q1
SYMATTR Value BC337-40
SYMBOL res -32 240 R90
WINDOW 0 17 58 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 220
SYMBOL LED 272 64 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -72 30 Left 2
SYMATTR InstName D2
SYMATTR Value AOT-2015
SYMBOL npn 80 208 R0
SYMATTR InstName Q2
SYMATTR Value BC337-40
SYMBOL diode -144 0 R0
WINDOW 3 30 34 Left 2
SYMATTR InstName D1
SYMATTR Value 1N4148
TEXT -146 418 Left 2 !.tran 3