Version 4
SHEET 1 1276 760
WIRE -848 -320 -1088 -320
WIRE -688 -320 -848 -320
WIRE -560 -320 -688 -320
WIRE -240 -320 -560 -320
WIRE -688 -224 -688 -240
WIRE 112 -224 -48 -224
WIRE 192 -224 112 -224
WIRE 240 -224 192 -224
WIRE 416 -224 240 -224
WIRE 848 -224 496 -224
WIRE 944 -224 848 -224
WIRE 1168 -224 944 -224
WIRE -48 -192 -48 -224
WIRE 112 -192 112 -224
WIRE 944 -192 944 -224
WIRE 240 -144 240 -224
WIRE -688 -128 -688 -144
WIRE -208 -128 -688 -128
WIRE 848 -128 848 -224
WIRE -688 -112 -688 -128
WIRE 304 -80 288 -80
WIRE -496 -64 -592 -64
WIRE -240 -64 -240 -320
WIRE -240 -64 -272 -64
WIRE -1088 -16 -1088 -320
WIRE -848 -16 -848 -320
WIRE -688 0 -688 -32
WIRE -496 0 -688 0
WIRE -208 0 -208 -128
WIRE -208 0 -272 0
WIRE 848 0 848 -64
WIRE 944 0 944 -48
WIRE 944 0 848 0
WIRE -48 16 -48 -112
WIRE 0 16 -48 16
WIRE 112 16 112 -112
WIRE 112 16 64 16
WIRE 272 48 144 48
WIRE -496 64 -528 64
WIRE -208 64 -272 64
WIRE 1168 80 1168 -224
WIRE 192 96 192 -224
WIRE 144 112 144 48
WIRE 160 112 144 112
WIRE 944 112 944 0
WIRE -560 128 -560 -320
WIRE -496 128 -560 128
WIRE -240 128 -272 128
WIRE 320 128 224 128
WIRE 384 128 320 128
WIRE 432 128 384 128
WIRE 528 128 496 128
WIRE 608 128 528 128
WIRE 112 144 112 16
WIRE 160 144 112 144
WIRE 608 144 608 128
WIRE 384 160 384 128
WIRE 768 160 720 160
WIRE 880 160 848 160
WIRE -688 192 -688 0
WIRE -208 192 -208 64
WIRE -208 192 -688 192
WIRE 112 192 112 144
WIRE -240 224 -240 128
WIRE -240 224 -320 224
WIRE -48 224 -48 16
WIRE 32 224 -48 224
WIRE 528 240 528 128
WIRE 608 256 608 208
WIRE 720 256 720 160
WIRE 720 256 608 256
WIRE -528 272 -528 64
WIRE -464 272 -528 272
WIRE -256 272 -384 272
WIRE 272 272 272 48
WIRE 288 272 272 272
WIRE 384 272 384 240
WIRE 384 272 368 272
WIRE -688 288 -688 192
WIRE -320 304 -320 224
WIRE -256 304 -256 272
WIRE -192 304 -256 304
WIRE 32 304 32 224
WIRE 32 304 0 304
WIRE 608 304 608 256
WIRE 720 304 720 256
WIRE 384 320 384 272
WIRE -192 400 -240 400
WIRE 32 400 0 400
WIRE -1088 432 -1088 64
WIRE -848 432 -848 48
WIRE -848 432 -1088 432
WIRE -688 432 -688 352
WIRE -688 432 -848 432
WIRE -592 432 -592 -64
WIRE -592 432 -688 432
WIRE -320 432 -320 368
WIRE -320 432 -592 432
WIRE -240 432 -240 400
WIRE -240 432 -320 432
WIRE 32 432 32 400
WIRE 112 432 112 272
WIRE 112 432 32 432
WIRE 192 432 192 160
WIRE 192 432 112 432
WIRE 240 432 240 -80
WIRE 240 432 192 432
WIRE 384 432 384 384
WIRE 384 432 240 432
WIRE 528 432 528 304
WIRE 528 432 384 432
WIRE 608 432 608 384
WIRE 608 432 528 432
WIRE 720 432 720 368
WIRE 720 432 608 432
WIRE 944 432 944 208
WIRE 944 432 720 432
WIRE 1168 432 1168 160
WIRE 1168 432 944 432
WIRE -1088 464 -1088 432
WIRE 608 464 608 432
FLAG 608 464 0
FLAG -1088 464 0
FLAG 320 128 op1
SYMBOL voltage 1168 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL Misc\\EuropeanResistor -64 -208 R0
SYMATTR InstName R1
SYMATTR Value 22k
SYMBOL Misc\\EuropeanResistor 96 -208 R0
SYMATTR InstName R2
SYMATTR Value 270k
SYMBOL Misc\\EuropeanResistor 96 176 R0
SYMATTR InstName R3
SYMATTR Value 270k
SYMBOL Misc\\EuropeanResistor 368 144 R0
SYMATTR InstName R8
SYMATTR Value 47k
SYMBOL Misc\\EuropeanResistor 384 256 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 47K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL cap 368 320 R0
SYMATTR InstName C2
SYMATTR Value 47nF
SYMBOL cap 496 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 2.2µ
SYMBOL diode 592 144 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 544 304 R180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL Misc\\EuropeanResistor 592 288 R0
SYMATTR InstName R4
SYMATTR Value 180k
SYMBOL Misc\\EuropeanResistor 752 176 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 10K
SYMBOL npn 880 112 R0
SYMATTR InstName Q2
SYMATTR Value BC547C
SYMBOL diode 864 -64 R180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL polcap 704 304 R0
WINDOW 3 24 64 Left 2
SYMATTR Value 4.7µ
SYMATTR InstName C3
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=4 Irms=0 Rser=7.5 Lser=0 mfg="AVX" pn="TAJA475K004" type="Tantalum"
SYMBOL Misc\\EuropeanResistor 512 -240 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 270
SYMBOL cap 224 -144 R0
SYMATTR InstName C5
SYMATTR Value 100µF
SYMBOL Misc\\NE555 -384 32 R0
SYMATTR InstName U1
SYMBOL cap -336 304 R0
SYMATTR InstName C6
SYMATTR Value 10n
SYMBOL cap -704 288 R0
SYMATTR InstName C7
SYMATTR Value 15n
SYMBOL Misc\\EuropeanResistor -704 -128 R0
SYMATTR InstName R9
SYMATTR Value 2.7k
SYMBOL Misc\\EuropeanResistor -704 -240 R0
SYMATTR InstName R10
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor -704 -336 R0
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL Optos\\PC817A -96 352 R0
SYMATTR InstName U3
SYMBOL cap -864 -16 R0
SYMATTR InstName C8
SYMATTR Value 100µ
SYMBOL Misc\\EuropeanResistor -480 288 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R12
SYMATTR Value 470
SYMBOL voltage -1088 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 0 1m 1m 0.3 1)
SYMBOL LED 928 -112 R0
SYMATTR InstName D4
SYMBOL res 928 -208 R0
SYMATTR InstName R13
SYMATTR Value 10k
SYMBOL Opamps\\UniversalOpamp2 192 128 R0
SYMATTR InstName U4
SYMBOL cap 64 0 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 47n
TEXT -1096 576 Left 2 !.tran 0 2 0 1m
TEXT -1096 536 Left 2 !.inc LM741.MOD
TEXT -1096 624 Left 2 !.ic V(op1)=6
CIRCLE Normal 48 -80 -128 -256 2
CIRCLE Normal -896 672 -1120 592 2