Version 4
SHEET 1 880 680
WIRE 112 -48 16 -48
WIRE 240 -48 112 -48
WIRE 240 0 240 -48
WIRE 112 64 112 -48
WIRE 240 96 240 80
WIRE 240 96 224 96
WIRE 240 128 240 96
WIRE 112 176 112 144
WIRE 144 176 112 176
WIRE 176 176 144 176
WIRE 16 192 16 -48
WIRE 112 192 112 176
WIRE 144 192 144 176
WIRE 16 288 16 272
WIRE 144 288 144 256
WIRE 144 288 16 288
WIRE 240 288 240 224
WIRE 240 288 144 288
WIRE 240 320 240 288
FLAG 240 320 0
FLAG 224 96 collector
FLAG 112 192 base
SYMBOL npn 176 128 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL res 224 -16 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL voltage 16 176 R0
WINDOW 3 -136 137 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 2 .01 .0001 .0001 1 2)
SYMATTR InstName V2
SYMBOL res 128 160 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL cap 128 192 R0
SYMATTR InstName C1
SYMATTR Value 10µf
TEXT 136 -32 Left 0 !.tran 2
TEXT -304 -64 Left 0 ;Base voltage vs collector current