Version 4
SHEET 1 896 680
WIRE -576 -288 -704 -288
WIRE -336 -288 -576 -288
WIRE -576 -272 -576 -288
WIRE -336 -256 -336 -288
WIRE -576 -160 -576 -192
WIRE -576 -160 -624 -160
WIRE -576 -144 -576 -160
WIRE -560 -144 -576 -144
WIRE -336 -144 -336 -176
WIRE -336 -144 -368 -144
WIRE -560 -80 -576 -80
WIRE -336 -48 -368 -48
WIRE -464 64 -480 64
WIRE -336 64 -336 -48
WIRE -336 64 -384 64
WIRE -320 64 -336 64
WIRE -32 64 -64 64
WIRE -480 128 -480 64
WIRE -400 128 -480 128
WIRE -320 128 -336 128
WIRE -32 128 -32 64
WIRE -32 128 -64 128
WIRE -704 192 -704 -288
WIRE -320 192 -704 192
WIRE -32 192 -64 192
WIRE -704 208 -704 192
WIRE -624 256 -624 -160
WIRE -320 256 -624 256
WIRE -32 256 -64 256
WIRE -704 304 -704 288
FLAG -704 304 0
FLAG -32 256 0
FLAG -32 192 0
FLAG -576 -80 0
SYMBOL voltage -704 192 R0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL LT1431 -192 160 R0
SYMATTR InstName U1
SYMBOL res -368 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 2K
SYMBOL cap -336 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL optos\\4N25 -464 -80 M0
SYMATTR InstName U2
SYMBOL res -352 -272 R0
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL res -592 -288 R0
SYMATTR InstName R6
SYMATTR Value 1K
TEXT -408 360 Left 2 !.tran 3m startup