Version 4
SHEET 1 880 680
WIRE -80 288 -80 112
WIRE -80 416 -80 368
WIRE -80 464 -80 416
WIRE -48 416 -80 416
WIRE -48 432 -48 416
WIRE 0 112 -80 112
WIRE 0 128 0 112
WIRE 0 240 0 208
WIRE 0 320 0 240
WIRE 0 464 -80 464
WIRE 0 464 0 384
WIRE 96 240 0 240
WIRE 96 256 96 240
WIRE 96 336 96 320
WIRE 96 368 96 336
WIRE 96 464 0 464
WIRE 96 464 96 448
WIRE 112 256 112 240
WIRE 112 336 96 336
WIRE 208 112 0 112
WIRE 208 128 208 112
WIRE 208 240 112 240
WIRE 208 240 208 208
WIRE 208 368 208 240
WIRE 208 464 96 464
WIRE 208 464 208 448
FLAG -48 432 0
FLAG 112 336 Out
IOPIN 112 336 Out
SYMBOL Robertugo\\put 80 256 R0
SYMATTR InstName U1
SYMBOL res -16 112 R0
WINDOW 0 -26 31 Left 0
WINDOW 3 -32 63 Left 0
SYMATTR InstName R1
SYMATTR Value 1e6
SYMBOL cap -16 320 R0
WINDOW 0 -18 4 Left 0
WINDOW 3 -21 81 Left 0
SYMATTR InstName C1
SYMATTR Value 2n5
SYMBOL res 80 352 R0
WINDOW 0 -22 27 Left 0
WINDOW 3 -24 67 Left 0
SYMATTR InstName R2
SYMATTR Value 56
SYMBOL res 192 112 R0
WINDOW 0 -32 31 Left 0
WINDOW 3 -43 66 Left 0
SYMATTR InstName R3
SYMATTR Value 22k
SYMBOL res 192 352 R0
WINDOW 0 -28 29 Left 0
SYMATTR InstName R4
SYMATTR Value 22k
SYMBOL voltage -80 272 R0
WINDOW 0 7 12 Left 0
WINDOW 3 -12 62 Left 0
SYMATTR InstName Vcc
SYMATTR Value 12
TEXT 230 122 Left 0 !.tran 0 50m 0 1u