Version 4
SHEET 1 880 680
WIRE 176 64 -128 64
WIRE 288 64 176 64
WIRE -128 96 -128 64
WIRE 176 112 176 64
WIRE 224 192 176 192
WIRE -128 304 -128 176
WIRE -128 320 -128 304
WIRE 176 320 -128 320
WIRE 288 320 176 320
FLAG -128 304 0
SYMBOL voltage -128 80 R0
SYMATTR InstName V1
SYMATTR Value 5V
SYMBOL voltage 288 48 R0
SYMATTR InstName V2
SYMATTR Value 0.9V
SYMATTR SpiceLine Rser=50mOhm
SYMBOL npn 224 144 R0
SYMATTR InstName Q1
SYMATTR Value BC337-40
SYMBOL diode 160 192 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 160 256 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL res 160 96 R0
SYMATTR InstName R1
SYMATTR Value 4k7
SYMBOL res 272 224 R0
SYMATTR InstName R2
SYMATTR Value 0.94R
TEXT -136 368 Left 0 !.tran 100m startup