Version 4
SHEET 1 1296 680
WIRE 512 112 -80 112
WIRE 1120 112 512 112
WIRE -80 144 -80 112
WIRE 512 160 512 112
WIRE 16 272 -80 272
WIRE 112 272 96 272
WIRE 208 272 112 272
WIRE 400 272 304 272
WIRE 512 272 512 240
WIRE 512 272 400 272
WIRE 560 272 512 272
WIRE 576 272 560 272
WIRE 400 336 400 272
WIRE 512 336 512 272
WIRE -80 352 -80 272
WIRE 560 352 560 272
WIRE 736 352 560 352
WIRE 960 352 736 352
WIRE 736 384 736 352
WIRE 960 384 960 352
WIRE 112 416 112 272
WIRE 128 416 112 416
WIRE 256 416 256 336
WIRE 256 416 208 416
WIRE 400 416 400 400
WIRE 400 416 256 416
WIRE -80 448 -80 432
WIRE 512 448 512 400
WIRE 736 480 736 464
WIRE 960 496 960 464
WIRE 1120 496 1120 112
WIRE 1120 496 960 496
WIRE 688 544 688 448
WIRE 912 544 912 448
FLAG -80 448 0
FLAG -80 224 0
FLAG 512 448 0
FLAG 576 272 OUT
FLAG 688 624 0
FLAG 912 624 0
FLAG 688 400 0
FLAG 912 400 0
FLAG 736 480 0
SYMBOL voltage -80 336 R0
WINDOW 3 -12 159 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 5 0 10n 10n 1u 2u)
SYMBOL res 112 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 50
SYMBOL res 224 400 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 528 256 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL cap 384 336 R0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL cap 496 336 R0
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL voltage -80 128 R0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL npn 304 336 M270
SYMATTR InstName Q1
SYMATTR Value 2N4400
SYMBOL voltage 688 528 R0
WINDOW 3 -249 138 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 1 2m 1n 1n 100u 8m)
SYMBOL voltage 912 528 R0
WINDOW 3 -78 135 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 1 6m 1n 1n 100u 8m)
SYMBOL sw 736 368 R0
SYMATTR InstName S1
SYMATTR Value MYSW
SYMBOL sw 960 368 R0
SYMATTR InstName S2
SYMATTR Value MYSW
TEXT -80 616 Left 2 !.tran 0 20m 0 100n UIC
TEXT -88 552 Left 2 !.model MYSW SW(Ron=1 Roff=1Meg Vt=.5 Vh=-.4)