Version 4
SHEET 1 2576 680
WIRE 176 -32 128 -32
WIRE 16 16 16 -16
WIRE -368 32 -368 -16
WIRE -272 32 -272 -16
WIRE 352 32 352 0
WIRE 432 32 432 0
WIRE 592 32 592 0
WIRE 848 32 848 0
WIRE 992 32 992 0
WIRE 176 48 176 -32
WIRE 48 144 -32 144
WIRE 176 160 176 128
WIRE 176 160 112 160
WIRE 208 160 176 160
WIRE 352 160 352 112
WIRE 352 160 272 160
WIRE 464 160 352 160
WIRE 16 176 16 96
WIRE 48 176 16 176
WIRE 592 176 592 112
WIRE 592 176 528 176
WIRE 640 176 592 176
WIRE 736 176 720 176
WIRE 880 176 736 176
WIRE 1200 176 1200 144
WIRE 16 192 16 176
WIRE 432 192 432 112
WIRE 464 192 432 192
WIRE 992 192 992 112
WIRE 992 192 944 192
WIRE 1040 192 992 192
WIRE 848 208 848 112
WIRE 880 208 848 208
WIRE -32 240 -32 144
WIRE -32 240 -144 240
WIRE -144 272 -144 240
WIRE 272 272 272 160
WIRE 432 272 432 192
WIRE 480 272 432 272
WIRE 592 272 592 176
WIRE 592 272 560 272
WIRE 1024 272 592 272
WIRE 1120 272 1104 272
WIRE 1200 272 1200 256
WIRE 1200 272 1120 272
WIRE 1296 272 1200 272
WIRE 48 304 16 304
WIRE 1120 304 1120 272
WIRE 176 320 112 320
WIRE 352 320 352 160
WIRE 432 320 432 272
WIRE 848 320 848 208
WIRE 1200 320 1200 272
WIRE -32 336 -32 240
WIRE 48 336 -32 336
WIRE 272 400 272 336
WIRE 272 400 128 400
WIRE 16 448 16 304
WIRE 1296 448 1296 272
WIRE 1296 448 16 448
FLAG 80 352 0
FLAG 80 192 0
FLAG 496 208 0
FLAG 912 224 0
FLAG 80 128 +
FLAG 80 288 +
FLAG 912 160 +
FLAG 496 144 +
FLAG -176 112 0
FLAG -176 32 +
FLAG 16 -16 +
FLAG -144 352 0
FLAG 128 -32 SET
FLAG 128 400 RESET
FLAG 352 0 +
FLAG 352 400 0
FLAG 432 400 0
FLAG 432 0 +
FLAG 592 0 +
FLAG -368 112 0
FLAG -272 112 0
FLAG -368 -16 SET
FLAG -272 -16 RESET
FLAG 736 240 0
FLAG 848 0 +
FLAG 848 400 0
FLAG 1040 192 OUT
FLAG 992 0 +
FLAG 1200 144 +
FLAG 1120 368 0
FLAG 1200 400 0
FLAG 16 272 0
SYMBOL Comparators/LTC1841 80 160 R0
SYMATTR InstName U1
SYMBOL Comparators/LTC1841 80 320 R0
SYMATTR InstName U2
SYMBOL Comparators/LTC1841 496 176 R0
SYMATTR InstName U3
SYMBOL Comparators/LTC1841 912 192 R0
SYMATTR InstName U4
SYMBOL voltage -176 16 R0
SYMATTR InstName V1
SYMATTR Value 8
SYMBOL res 0 176 R0
SYMATTR InstName R1
SYMATTR Value 3k5
SYMBOL res 0 0 R0
SYMATTR InstName R2
SYMATTR Value 4k5
SYMBOL voltage -144 256 R0
WINDOW 3 24 38 Invisible 2
SYMATTR InstName V2
SYMATTR Value PWL(100m 0 +1m 1 +99m 1 +1m 2.0 +99m 2 +1m 3 +99m 3 +1m 4 +99m 4 +1m 5 +99m 5 +1m 6 +99m 6 +1m 7 +99m 7 +1m 8 +99m 8 +1m 7 +99m 7 +1m 6 +99m 6 +1m 5 +99m 5 +1m 4 +99m 4 +1m 3 +99m 3 +1m 2 +99m 2 +1m 1 +99m 1 +1m 0 +99m 0)
SYMBOL diode 208 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N914
SYMBOL diode 256 272 R0
SYMATTR InstName D2
SYMATTR Value 1N914
SYMBOL res 160 32 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 336 304 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 336 16 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 416 304 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 416 16 R0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res 576 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 100k
SYMBOL res 576 16 R0
SYMATTR InstName R9
SYMATTR Value 1k
SYMBOL res 1184 304 R0
SYMATTR InstName R10
SYMATTR Value 2k
SYMBOL voltage -368 16 R0
WINDOW 3 -1 127 VRight 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 8 51m 10n 10n 1m 100m)
SYMBOL voltage -272 16 R0
WINDOW 3 -6 136 VRight 2
SYMATTR InstName V4
SYMATTR Value PULSE(8 0 50.5m 10n 10n 1m 100m)
SYMBOL res 736 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 100k
SYMBOL cap 720 176 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL res 832 304 R0
SYMATTR InstName R12
SYMATTR Value 10k
SYMBOL res 832 16 R0
SYMATTR InstName R13
SYMATTR Value 10k
SYMBOL res 976 16 R0
SYMATTR InstName R14
SYMATTR Value 1k
SYMBOL res 1120 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 10k
SYMBOL res 1184 160 R0
SYMATTR InstName R16
SYMATTR Value 7k2
SYMBOL cap 1104 304 R0
SYMATTR InstName C2
SYMATTR Value 100n
TEXT 1200 -32 Left 2 !.tran 1700m
TEXT 56 160 Left 4 ;A
TEXT 64 320 Left 4 ;B
TEXT 472 176 Left 4 ;C
TEXT 896 192 Left 4 ;D
TEXT 8 120 Right 2 ;3.5v
TEXT 8 400 Right 2 ;2.5v@Chigh
TEXT 8 432 Right 2 ;1.5v@Clow