Version 4
SHEET 1 880 680
WIRE 64 -80 -112 -80
WIRE -112 -32 -112 -80
WIRE 576 48 160 48
WIRE 160 112 160 48
WIRE 64 128 64 -80
WIRE 128 128 64 128
WIRE 576 128 576 48
WIRE 224 144 192 144
WIRE 320 144 320 96
WIRE 320 144 224 144
WIRE -16 160 -64 160
WIRE 128 160 64 160
WIRE -64 192 -64 160
WIRE 64 272 64 160
WIRE 224 272 224 144
WIRE 224 272 144 272
WIRE -112 320 -112 48
WIRE -64 320 -64 272
WIRE -64 320 -112 320
WIRE 160 320 160 176
WIRE 160 320 -64 320
WIRE 320 320 320 224
WIRE 320 320 160 320
WIRE 576 320 576 208
WIRE 576 320 320 320
WIRE 320 384 320 320
FLAG 320 384 0
FLAG 320 96 out
SYMBOL voltage 576 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage -64 176 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 0
SYMBOL voltage -112 -48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL Comparators\\LTC1841 160 144 R0
SYMATTR InstName U2
SYMBOL res 80 144 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 3900
SYMBOL res 160 256 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 19100
SYMBOL res 336 240 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R3
SYMATTR Value 100k
TEXT -144 408 Left 0 !.dc v2 0 10 0.1