Version 4
SHEET 1 2188 680
WIRE 992 64 976 64
WIRE 1088 64 1072 64
WIRE 1152 64 1088 64
WIRE 1280 64 1232 64
WIRE 848 112 752 112
WIRE 752 128 752 112
WIRE 848 128 848 112
WIRE 1152 192 1152 160
WIRE 1088 208 1088 64
WIRE 1136 208 1088 208
WIRE 752 224 752 208
WIRE 1280 224 1280 64
WIRE 1280 224 1200 224
WIRE 1296 224 1280 224
WIRE 848 240 848 208
WIRE 992 240 848 240
WIRE 1136 240 1072 240
WIRE 656 256 656 240
WIRE 848 256 848 240
WIRE 1152 288 1152 256
WIRE 1184 288 1184 256
WIRE 656 352 656 336
WIRE 848 352 848 336
FLAG 1296 224 OUT
FLAG 1152 288 0
FLAG 976 64 0
FLAG 1184 288 +V
FLAG 848 352 0
FLAG 752 224 0
FLAG 656 352 0
FLAG 656 240 +V
FLAG 1152 160 +V
SYMBOL res 1248 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 1088 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL res 1088 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 832 240 R0
SYMATTR InstName R4
SYMATTR Value 100m
SYMBOL res 832 112 R0
SYMATTR InstName R5
SYMATTR Value {5/Iload}
SYMBOL voltage 752 112 R0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage 656 240 R0
SYMATTR InstName V3
SYMATTR Value 3.3
SYMBOL LTC2068 1168 224 R0
SYMATTR InstName U1
TEXT 1040 344 Left 2 !.op\n.step dec param Iload .1m 250m 2