Version 4
SHEET 1 880 680
WIRE 304 80 240 80
WIRE -160 160 -240 160
WIRE -48 160 -80 160
WIRE 160 160 160 80
WIRE 160 160 144 160
WIRE -240 256 -240 240
WIRE -128 256 -240 256
WIRE -48 256 -128 256
FLAG 304 160 0
FLAG 144 256 0
FLAG -128 320 0
SYMBOL voltage 304 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 256 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -64 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL Optos\\PC817A 48 208 R0
SYMATTR InstName U1
SYMBOL voltage -240 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(5 5 2)
SYMBOL cap -144 256 R0
SYMATTR InstName C1
SYMATTR Value 10p
TEXT -274 302 Left 2 !.tran 1