Version 4
SHEET 1 880 680
WIRE 48 96 -16 96
WIRE 96 96 48 96
WIRE 464 96 96 96
WIRE 464 112 464 96
WIRE -16 160 -16 96
WIRE 400 160 352 160
WIRE 96 176 96 96
WIRE 64 192 32 192
WIRE 192 208 128 208
WIRE 288 208 272 208
WIRE 48 224 48 96
WIRE 64 224 48 224
WIRE 272 256 272 208
WIRE 464 256 464 208
WIRE 576 256 464 256
WIRE 464 272 464 256
WIRE -16 336 -16 240
WIRE 96 336 96 240
WIRE 32 368 32 192
WIRE 576 368 576 256
WIRE 576 368 32 368
FLAG -16 336 0
FLAG 352 336 0
FLAG 464 336 0
FLAG 96 336 0
FLAG 272 336 0
SYMBOL voltage -16 144 R0
WINDOW 3 -29 267 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 -24 256 Left 2
SYMATTR Value PULSE(0 1.8 1 .01 .01 15 20)
SYMATTR InstName V1
SYMBOL npn 288 160 R0
SYMATTR InstName Q1
SYMATTR Value BC817-25
SYMBOL res 336 240 R0
SYMATTR InstName R2
SYMATTR Value 4k7
SYMBOL pnp 400 208 M180
SYMATTR InstName Q2
SYMATTR Value BC807-25
SYMBOL cap 448 272 R0
SYMATTR InstName C1
SYMATTR Value 1
SYMATTR SpiceLine Rser=33
SYMBOL res 256 240 R0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 288 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL Comparators\\LT1716 96 208 R0
SYMATTR InstName U1
TEXT -48 384 Left 2 !.tran 360 startup uic
TEXT 496 328 Left 2 ;R=33