Version 4
SHEET 1 1100 680
WIRE -208 -32 -352 -32
WIRE 0 -32 -208 -32
WIRE 224 -32 64 -32
WIRE 384 -32 224 -32
WIRE 672 -32 384 -32
WIRE 912 0 912 -64
WIRE 224 16 224 -32
WIRE 384 80 384 -32
WIRE 704 80 672 48
WIRE 912 80 912 0
WIRE 912 80 896 80
WIRE 928 80 912 80
WIRE 1040 80 1008 80
WIRE 1040 96 1040 80
WIRE -352 128 -352 -32
WIRE -208 128 -208 -32
WIRE 224 128 224 80
WIRE 704 176 672 176
WIRE 1040 176 896 176
WIRE 1056 176 1040 176
WIRE 672 192 672 176
WIRE -352 240 -352 208
WIRE -16 240 -352 240
WIRE 80 240 -16 240
WIRE 176 240 80 240
WIRE 272 240 176 240
WIRE 384 240 384 160
WIRE 384 240 336 240
WIRE 496 240 384 240
WIRE 608 240 496 240
WIRE 1056 240 1056 176
WIRE 176 256 176 240
WIRE -16 272 -16 240
WIRE 80 272 80 240
WIRE 384 288 384 240
WIRE 496 288 496 240
WIRE -208 400 -208 208
WIRE -16 400 -16 336
WIRE -16 400 -208 400
WIRE 80 400 80 336
WIRE 80 400 -16 400
WIRE 176 400 176 336
WIRE 176 400 80 400
WIRE 384 400 384 352
WIRE 384 400 176 400
WIRE 496 400 496 352
WIRE 496 400 384 400
WIRE 672 400 672 368
WIRE 672 400 496 400
WIRE 864 400 672 400
WIRE -16 416 -16 400
FLAG -16 416 0
FLAG 912 0 U_Occ
FLAG 1056 240 0
FLAG 224 128 0
SYMBOL voltage -208 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(-18 18 0 50n 50n 1000µ 3000µ)
SYMBOL diode 0 -16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode -32 272 R0
WINDOW 3 71 95 Left 2
SYMATTR InstName D2
SYMATTR Value MURS320
SYMBOL diode 96 336 R180
WINDOW 0 24 64 Left 2
WINDOW 3 140 33 Left 2
SYMATTR InstName D3
SYMATTR Value MURS320
SYMBOL diode 336 224 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL res 160 240 R0
SYMATTR InstName R1
SYMATTR Value 330
SYMBOL res 368 64 R0
SYMATTR InstName R2
SYMATTR Value 220k
SYMBOL res 656 -48 R0
SYMATTR InstName R3
SYMATTR Value 2k2
SYMBOL res 656 272 R0
SYMATTR InstName R4
SYMATTR Value 33
SYMBOL res -368 112 R0
SYMATTR InstName R5
SYMATTR Value 22k
SYMBOL npn 608 192 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL cap 368 288 R0
SYMATTR InstName C1
SYMATTR Value 1pF
SYMBOL Optos\\PC817A 800 128 R0
SYMATTR InstName U1
SYMBOL voltage 1040 80 R0
SYMATTR InstName V2
SYMATTR Value 5V
SYMBOL res 1024 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL cap 208 16 R0
SYMATTR InstName C2
SYMATTR Value 10µF
SYMBOL diode 512 352 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -92 27 Left 2
SYMATTR InstName D5
SYMATTR Value 1N4148
TEXT -520 384 Left 2 !.tran 0.01