Version 4
SHEET 1 880 680
WIRE 96 -144 -32 -144
WIRE 336 -144 96 -144
WIRE 432 -144 336 -144
WIRE 608 -144 432 -144
WIRE 800 -144 608 -144
WIRE 608 -32 608 -144
WIRE -32 16 -32 -144
WIRE 80 48 32 48
WIRE 192 48 160 48
WIRE 336 64 336 -144
WIRE 608 96 608 48
WIRE 96 112 96 -144
WIRE 64 128 48 128
WIRE 800 128 800 -144
WIRE 192 144 192 48
WIRE 192 144 128 144
WIRE -32 160 -32 96
WIRE 32 160 32 48
WIRE 32 160 -32 160
WIRE 64 160 32 160
WIRE 96 208 96 176
WIRE 192 208 192 144
WIRE -32 224 -32 160
WIRE 608 240 608 160
WIRE 800 240 800 208
WIRE 432 288 432 -144
WIRE 48 304 48 128
WIRE 192 304 192 288
WIRE 192 304 48 304
WIRE 400 304 192 304
WIRE 560 320 464 320
WIRE -32 336 -32 304
WIRE 48 336 48 304
WIRE 336 336 336 144
WIRE 400 336 336 336
WIRE 224 368 160 368
WIRE 336 368 336 336
WIRE 336 368 304 368
WIRE 608 384 608 336
WIRE 160 400 160 368
WIRE 432 400 432 352
WIRE 336 416 336 368
WIRE 48 432 48 400
WIRE 160 512 160 480
WIRE 336 528 336 496
FLAG -32 336 0
FLAG 48 432 0
FLAG 336 528 0
FLAG 432 400 0
FLAG 96 208 0
FLAG 608 384 0
FLAG 800 240 0
FLAG 160 512 0
SYMBOL Opamps\\LT1001 96 80 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1001 432 256 R0
SYMATTR InstName U2
SYMBOL res -48 0 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res -48 208 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 176 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 208 304 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL cap 32 336 R0
SYMATTR InstName C1
SYMATTR Value 22n
SYMBOL res 320 48 R0
SYMATTR InstName R5
SYMATTR Value 6.2k
SYMBOL res 320 400 R0
SYMATTR InstName R6
SYMATTR Value 15k
SYMBOL res 320 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 4.7k
SYMBOL nmos 560 240 R0
SYMATTR InstName M1
SYMATTR Value IRFH5306
SYMBOL LED 592 96 R0
SYMATTR InstName D1
SYMATTR Value PT-121-B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 592 -48 R0
SYMATTR InstName R8
SYMATTR Value 10
SYMBOL voltage 800 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 160 384 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 8
TEXT -52 552 Left 2 !.tran 0.01