Version 4
SHEET 1 880 680
WIRE -48 192 -48 64
WIRE -48 256 -48 192
WIRE -48 288 -48 256
WIRE -48 320 -48 288
WIRE -48 432 -48 384
WIRE -16 64 -48 64
WIRE -16 192 -48 192
WIRE 16 256 -48 256
WIRE 16 288 -48 288
WIRE 80 64 64 64
WIRE 80 64 80 16
WIRE 112 64 80 64
WIRE 144 16 80 16
WIRE 144 32 144 16
WIRE 224 64 176 64
WIRE 224 96 224 64
WIRE 224 192 64 192
WIRE 224 192 224 160
WIRE 224 272 128 272
WIRE 224 272 224 192
WIRE 256 192 224 192
FLAG -48 432 0
FLAG 256 192 Out
FLAG -48 64 In
SYMBOL Dig_Add\\CD4xxx\\cd4093b 64 208 R0
SYMATTR InstName U1
SYMATTR SpiceLine VDD={Vcc}  SPEED=1.0  TRIPDT=5e-9
SYMBOL Robertugo\\Pote 208 48 R90
WINDOW 0 -9 93 VRight 0
WINDOW 3 57 31 VRight 0
WINDOW 123 -19 -23 VCenter 0
SYMATTR InstName U2
SYMATTR Value Rt=1e5
SYMATTR Value2 Set={Cursor}
SYMBOL res 80 176 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 79 VTop 0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL cap -64 320 R0
WINDOW 0 37 11 Left 0
WINDOW 3 36 47 Left 0
SYMATTR InstName C1
SYMATTR Value 10n
SYMATTR SpiceLine Rpar=1e9
SYMBOL res 80 48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 79 VTop 0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL diode 240 160 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D1
SYMATTR Value 1N914
TEXT -16 400 Left 0 !.param Vcc=15\n.step param Cursor 0 1 .5
TEXT 132 362 Left 0 !.tran 10m uic