Version 4
SHEET 1 880 680
WIRE 176 0 64 0
WIRE 288 0 176 0
WIRE 448 0 288 0
WIRE 496 0 448 0
WIRE 592 0 496 0
WIRE 64 32 64 0
WIRE 288 32 288 0
WIRE 448 32 448 0
WIRE 496 32 496 0
WIRE 176 96 176 0
WIRE -32 144 -80 144
WIRE 64 144 64 112
WIRE 64 144 32 144
WIRE 112 144 64 144
WIRE 448 144 448 112
WIRE 496 144 496 96
WIRE 496 144 448 144
WIRE 592 176 592 0
WIRE 176 208 176 192
WIRE 352 208 176 208
WIRE 448 208 448 144
WIRE 288 272 288 112
WIRE 400 272 288 272
WIRE 64 288 64 144
WIRE 176 288 176 208
WIRE 288 288 288 272
WIRE 400 304 400 272
WIRE 64 400 64 368
WIRE 176 400 176 368
WIRE 176 400 64 400
WIRE 288 400 288 368
WIRE 288 400 176 400
WIRE 400 400 400 368
WIRE 400 400 288 400
WIRE 592 400 592 256
WIRE 592 400 400 400
WIRE 592 416 592 400
WIRE -80 448 -80 144
WIRE 496 448 496 144
WIRE 496 448 -80 448
FLAG 592 416 0
SYMBOL npn 112 96 R0
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL npn 448 272 M270
SYMATTR InstName Q2
SYMATTR Value BC547C
SYMBOL ind 464 16 M0
SYMATTR InstName L1
SYMATTR Value 250µ
SYMATTR SpiceLine Rser=1 Rpar=100k
SYMBOL cap 480 32 R0
SYMATTR InstName C1
SYMATTR Value 100p
SYMBOL cap 32 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 100p
SYMBOL cap 384 304 R0
SYMATTR InstName C3
SYMATTR Value 100p
SYMBOL Misc\\battery 592 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL Misc\\EuropeanResistor 48 16 R0
SYMATTR InstName R2
SYMATTR Value 330k
SYMBOL Misc\\EuropeanResistor 48 272 R0
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL Misc\\EuropeanResistor 304 16 M0
SYMATTR InstName R1
SYMATTR Value 330k
SYMBOL Misc\\EuropeanResistor 160 272 R0
SYMATTR InstName R4
SYMATTR Value 4.7k
SYMBOL Misc\\EuropeanResistor 272 272 R0
SYMATTR InstName R5
SYMATTR Value 100k
TEXT -192 16 Left 2 !.tran 0 100u 0 10n