Version 4
SHEET 1 1044 680
WIRE -352 64 -352 48
WIRE -352 176 -352 160
WIRE -288 176 -352 176
WIRE -176 272 -176 144
WIRE -176 464 -176 352
WIRE -128 112 -288 112
WIRE -128 304 -128 112
WIRE -112 112 -128 112
WIRE -96 320 -96 240
WIRE -96 464 -176 464
WIRE -96 464 -96 384
WIRE -96 480 -96 464
WIRE -64 48 -352 48
WIRE -48 176 -208 176
WIRE -48 464 -96 464
WIRE -48 464 -48 176
WIRE -32 144 -176 144
WIRE -32 368 -32 144
WIRE -16 240 -96 240
WIRE -16 400 -16 240
WIRE 0 176 -48 176
WIRE 0 240 -16 240
WIRE 0 304 -128 304
WIRE 0 368 -32 368
WIRE 176 144 -32 144
WIRE 176 144 176 128
WIRE 224 48 16 48
WIRE 224 64 224 48
WIRE 240 144 176 144
WIRE 240 176 224 176
WIRE 240 176 240 144
WIRE 240 304 224 304
WIRE 240 304 240 192
WIRE 240 400 -16 400
WIRE 240 400 240 304
WIRE 272 192 240 192
WIRE 272 368 224 368
WIRE 272 384 272 368
WIRE 272 464 -48 464
WIRE 272 464 272 448
WIRE 304 128 272 128
WIRE 304 160 304 128
WIRE 304 240 224 240
WIRE 304 240 304 224
FLAG -96 480 0
FLAG -112 112 Out
IOPIN -112 112 Out
SYMBOL Robertugo\\555_ALL 160 288 R0
WINDOW 38 -75 81 Left 0
WINDOW 0 -62 -81 Left 0
SYMATTR InstName U1
SYMBOL cap -112 320 R0
WINDOW 0 21 8 Left 0
WINDOW 3 19 64 Left 0
SYMATTR InstName Ct
SYMATTR Value 10n
SYMBOL cap 256 384 R0
WINDOW 0 21 8 Left 0
WINDOW 3 19 64 Left 0
SYMATTR InstName Cbp
SYMATTR Value 10n
SYMBOL voltage -176 256 R0
WINDOW 3 -13 59 Left 0
WINDOW 0 3 104 Left 0
SYMATTR Value 12
SYMATTR InstName Vcc
SYMBOL Robertugo\\Pote 288 128 R0
WINDOW 123 34 133 Center 0
SYMATTR Value2 Set={Cursor}
SYMATTR InstName U2
SYMATTR Value Rt=20K
SYMBOL pnp2 272 64 R90
WINDOW 0 9 109 VRight 0
WINDOW 3 36 98 VRight 0
SYMATTR InstName Q1
SYMATTR Value 2N3906
SYMBOL npn2 -288 64 M0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL res -192 160 R90
WINDOW 0 0 71 VBottom 0
WINDOW 3 -25 24 VTop 0
SYMATTR InstName R1
SYMATTR Value 2k2
SYMBOL res 32 32 R90
WINDOW 0 14 111 VBottom 0
WINDOW 3 -13 -9 VTop 0
SYMATTR InstName R2
SYMATTR Value 3k3
TEXT 166 482 Left 0 !.tran 5m startup
TEXT -872 152 Left 0 !.params: Vdd 12 Ronx=.1 \n.step param Cursor  .01 .99 .2\n.meas tran ta FIND time WHEN V(out)={Vdd/2} td=1m rise=1\n.meas tran tb FIND time WHEN V(out)={Vdd/2} td=1m rise=11\n.meas tran Frec PARAM 10/(tb-ta)\n.Meas tran Tc FIND time WHEN V(Out)={Vdd/2} td=1m fall=1\n.Meas tran Td FIND time WHEN V(Out)={Vdd/2} td=1m fall=2\n.Meas tran T1 Param  (Tc-Ta)\n.Meas tran T2  Param  (Td-Ta)\n.Meas tran Ton Param If (T1>0, T1, T2)\n.Meas tran Duty% Param  Ton*Frec*100
TEXT 248 152 Left 0 ;Rton
TEXT 248 224 Left 0 ;Rtoff