Version 4
SHEET 1 1444 680
WIRE -224 112 -320 112
WIRE -144 112 -224 112
WIRE -96 112 -144 112
WIRE 32 112 -16 112
WIRE 80 112 32 112
WIRE 368 112 176 112
WIRE 528 112 368 112
WIRE 688 112 528 112
WIRE 752 112 688 112
WIRE 832 112 752 112
WIRE 1120 112 832 112
WIRE 1200 112 1120 112
WIRE 1280 112 1200 112
WIRE 752 144 752 112
WIRE 1280 144 1280 112
WIRE 688 160 688 112
WIRE 528 176 528 112
WIRE 32 224 32 112
WIRE 128 224 128 176
WIRE 1120 224 1120 112
WIRE -224 240 -224 112
WIRE -144 240 -144 112
WIRE 832 240 832 112
WIRE -320 256 -320 112
WIRE 640 256 592 256
WIRE 688 256 688 224
WIRE 752 256 752 224
WIRE 752 256 688 256
WIRE 800 256 752 256
WIRE 640 272 640 256
WIRE 912 272 864 272
WIRE 1024 272 976 272
WIRE 1056 272 1024 272
WIRE 1200 272 1200 112
WIRE 1280 272 1280 144
WIRE 800 288 704 288
WIRE 256 320 224 320
WIRE 368 320 368 112
WIRE 368 320 336 320
WIRE 752 320 752 256
WIRE 832 336 832 304
WIRE 1024 352 1024 272
WIRE 1040 352 1024 352
WIRE 1120 352 1120 320
WIRE 1120 352 1104 352
WIRE 224 384 224 320
WIRE 480 384 448 384
WIRE 528 384 528 336
WIRE 528 384 480 384
WIRE 640 384 640 352
WIRE 640 384 528 384
WIRE 704 384 704 288
WIRE 704 384 640 384
WIRE 448 400 448 384
WIRE 528 400 528 384
WIRE -144 448 -144 304
WIRE 80 448 80 288
WIRE 80 448 -144 448
WIRE 144 448 80 448
WIRE 368 448 368 320
WIRE 368 448 304 448
WIRE -320 512 -320 336
WIRE -224 512 -224 304
WIRE 448 512 448 464
WIRE 528 512 528 480
WIRE 752 512 752 400
WIRE 1120 512 1120 352
WIRE 1200 512 1200 336
WIRE 1280 512 1280 352
FLAG -320 512 0
FLAG 752 512 0
FLAG 1120 512 0
FLAG 1280 512 0
FLAG 1280 144 out
FLAG 528 512 0
FLAG 1200 512 0
FLAG -224 512 0
FLAG 448 512 0
FLAG 480 384 ref
FLAG 832 336 0
SYMBOL LM334 224 448 R270
SYMATTR InstName U1
SYMBOL npn 80 176 R270
WINDOW 0 3 88 VRight 0
WINDOW 3 47 24 VRight 0
SYMATTR InstName Qser
SYMBOL pnp 128 288 M270
WINDOW 0 17 -1 VLeft 0
WINDOW 3 51 68 VLeft 0
SYMATTR InstName Q2
SYMBOL res 0 96 R90
WINDOW 0 46 110 VBottom 0
WINDOW 3 22 -2 VTop 0
SYMATTR InstName Rs
SYMATTR Value 15
SYMBOL LED -160 240 R0
WINDOW 3 29 114 Left 0
SYMATTR Value NSPW500BS
SYMATTR InstName Dled
SYMBOL res 352 304 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 12
SYMBOL voltage -320 240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -14 57 Left 0
SYMATTR InstName V+
SYMATTR Value 30
SYMBOL pnp 1056 320 M180
WINDOW 0 -6 102 Left 0
WINDOW 3 29 50 Left 0
SYMATTR InstName Qpar
SYMBOL res 736 128 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 736 304 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 1264 256 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL LM334 528 256 R0
SYMATTR InstName U3
SYMBOL res 512 384 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 624 256 R0
SYMATTR InstName R7
SYMATTR Value 73
SYMBOL cap 672 160 R0
WINDOW 3 -51 10 Left 0
SYMATTR Value 200p
SYMATTR InstName C1
SYMBOL cap 1184 272 R0
WINDOW 3 25 53 Left 0
SYMATTR InstName C2
SYMATTR Value 220µ
SYMBOL cap -240 240 R0
WINDOW 3 23 82 Left 0
SYMATTR Value 220µ
SYMATTR InstName C3
SYMBOL cap 432 400 R0
SYMATTR InstName C4
SYMATTR Value 0.1µ
SYMBOL cap 1104 336 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C5
SYMATTR Value 15p
SYMBOL Opamps\\UniversalOpamp2 832 272 R0
SYMATTR InstName U2
SYMBOL zener 912 288 R270
WINDOW 0 36 32 VTop 0
WINDOW 3 -4 32 VBottom 0
SYMATTR InstName D3
SYMATTR Value 1N750
TEXT -144 472 Left 0 !;op
TEXT -152 512 Left 0 !.tran 0 50m 0 startup
TEXT 920 344 Left 0 ;4.7V
TEXT 856 152 Left 0 ;Rail to Rail I/O Opamp