Version 4
SHEET 1 2244 936
WIRE 432 0 32 0
WIRE 816 0 432 0
WIRE 1184 0 816 0
WIRE 1664 0 1184 0
WIRE 1888 0 1664 0
WIRE 32 64 32 0
WIRE 1664 80 1664 0
WIRE 1888 80 1888 0
WIRE 224 128 192 128
WIRE 432 128 432 0
WIRE 432 128 416 128
WIRE 608 128 576 128
WIRE 816 128 816 0
WIRE 816 128 800 128
WIRE 944 128 912 128
WIRE 1184 128 1184 0
WIRE 1184 128 1136 128
WIRE 32 176 32 144
WIRE 224 224 192 224
WIRE 464 224 416 224
WIRE 608 224 576 224
WIRE 864 224 800 224
WIRE 944 224 928 224
WIRE 1200 224 1136 224
WIRE 1264 224 1200 224
WIRE 1376 224 1328 224
WIRE 1440 224 1376 224
WIRE 1792 224 1520 224
WIRE 192 256 192 224
WIRE 576 256 576 224
WIRE 928 256 928 224
WIRE 464 320 464 224
WIRE 1264 320 464 320
WIRE 1376 320 1376 224
WIRE 1376 320 1328 320
WIRE 32 384 32 336
WIRE 864 400 864 224
WIRE 1264 400 864 400
WIRE 1376 400 1376 320
WIRE 1376 400 1328 400
WIRE 1440 400 1376 400
WIRE 1536 400 1520 400
WIRE 1568 400 1536 400
WIRE 1888 400 1888 160
WIRE 1888 400 1632 400
WIRE 1664 448 1664 160
WIRE 1888 448 1888 400
WIRE 1376 464 1376 400
WIRE 464 480 464 320
WIRE 560 480 464 480
WIRE 864 480 864 400
WIRE 960 480 864 480
WIRE 1200 480 1200 224
WIRE 1296 480 1200 480
WIRE 32 496 32 464
WIRE 560 512 560 480
WIRE 960 512 960 480
WIRE 1296 512 1296 480
WIRE 1536 528 1536 400
WIRE 1616 528 1536 528
WIRE 1792 528 1792 224
WIRE 1840 528 1792 528
WIRE 1376 576 1376 544
WIRE 1664 576 1664 544
WIRE 1888 576 1888 544
WIRE 32 592 32 560
WIRE 464 592 464 480
WIRE 864 592 864 480
WIRE 1200 592 1200 480
WIRE 560 672 560 576
WIRE 960 672 960 576
WIRE 1296 672 1296 576
WIRE 32 704 32 672
WIRE 464 736 464 672
WIRE 512 736 464 736
WIRE 864 736 864 672
WIRE 912 736 864 736
WIRE 1200 736 1200 672
WIRE 1248 736 1200 736
WIRE 32 784 32 752
WIRE 464 784 464 736
WIRE 864 784 864 736
WIRE 1200 784 1200 736
WIRE 608 880 608 736
WIRE 1008 880 1008 736
WIRE 1008 880 608 880
WIRE 1344 880 1344 736
WIRE 1344 880 1008 880
WIRE 1792 880 1792 528
WIRE 1792 880 1344 880
WIRE 32 896 32 864
FLAG 32 176 0
FLAG 192 256 0
FLAG 576 256 0
FLAG 928 256 0
FLAG 1664 576 0
FLAG 1888 576 0
FLAG 464 784 0
FLAG 32 496 0
FLAG 32 336 o1
FLAG 32 704 0
FLAG 32 896 0
FLAG 32 560 o2
FLAG 32 752 o3
FLAG 192 128 o1
FLAG 576 128 o2
FLAG 912 128 o3
FLAG 1376 576 0
FLAG 864 784 0
FLAG 1200 784 0
SYMBOL voltage 32 48 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMATTR SpiceLine Rser=1
SYMBOL Optos\\PC817B 320 176 R0
SYMATTR InstName U1
SYMBOL Optos\\PC817B 704 176 R0
SYMATTR InstName U2
SYMBOL Optos\\PC817B 1040 176 R0
SYMATTR InstName U3
SYMBOL res 1648 64 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 1872 64 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 448 576 R0
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL diode 1264 336 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 1264 416 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL diode 1264 240 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL res 1536 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 100k
SYMBOL pnp 512 672 M90
SYMATTR InstName Q3
SYMATTR Value BC556B
SYMBOL diode 576 576 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL voltage 32 368 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 1 1m 1m 1 5)
SYMATTR SpiceLine Rser=1k
SYMBOL voltage 32 576 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 2.1 1m 1m 1 4.5)
SYMATTR SpiceLine Rser=1k
SYMBOL voltage 32 768 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 5 3.2 1m 1m 1 3.2)
SYMATTR SpiceLine Rser=1k
SYMBOL res 1360 448 R0
SYMATTR InstName R8
SYMATTR Value 100k
SYMBOL res 1536 384 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 100k
SYMBOL diode 1568 416 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D9
SYMATTR Value 1N4148
SYMBOL nmos 1616 448 R0
SYMATTR InstName M1
SYMATTR Value IRFL014
SYMBOL nmos 1840 448 R0
SYMATTR InstName M2
SYMATTR Value IRFL014
SYMBOL res 848 576 R0
SYMATTR InstName R4
SYMATTR Value 100k
SYMBOL pnp 912 672 M90
SYMATTR InstName Q1
SYMATTR Value BC556B
SYMBOL diode 976 576 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL res 1184 576 R0
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL pnp 1248 672 M90
SYMATTR InstName Q2
SYMATTR Value BC556B
SYMBOL diode 1312 576 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D6
SYMATTR Value 1N4148
TEXT -2 920 Left 2 !.tran 10