Version 4
SHEET 1 1432 680
WIRE 80 -112 -48 -112
WIRE 464 -112 80 -112
WIRE 864 -112 464 -112
WIRE -48 -96 -48 -112
WIRE 464 -96 464 -112
WIRE 192 -32 192 -48
WIRE 320 -32 320 -48
WIRE -48 0 -48 -16
WIRE 80 16 80 -112
WIRE 96 16 80 16
WIRE 464 16 464 -16
WIRE 464 16 416 16
WIRE 608 16 464 16
WIRE 752 16 688 16
WIRE 96 112 64 112
WIRE 464 112 416 112
WIRE 864 112 864 -112
WIRE 864 112 544 112
WIRE 96 208 64 208
WIRE 448 208 416 208
FLAG -48 0 0
FLAG 64 112 0
FLAG 752 16 0
SYMBOL voltage -48 -112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName Vbatt
SYMATTR Value 3.7
SYMBOL res 448 -112 R0
SYMATTR InstName Rsense
SYMATTR Value 100m
SYMBOL res 560 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL voltage 592 16 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V2
SYMATTR Value PULSE(3.75 3.65 1s 1m 1m 3 6)
SYMBOL LTC2943 256 112 R0
SYMATTR InstName U1
TEXT 632 256 Left 2 !.tran 15