Version 4 SHEET 1 1000 680 WIRE -128 -48 -272 -48 WIRE 48 -48 -128 -48 WIRE 128 -48 48 -48 WIRE 416 -48 128 -48 WIRE 672 -48 416 -48 WIRE 416 48 416 -48 WIRE 496 48 416 48 WIRE 416 64 416 48 WIRE -128 80 -128 32 WIRE 0 80 -128 80 WIRE 384 80 256 80 WIRE -272 96 -272 -48 WIRE 528 96 448 96 WIRE 672 96 672 -48 WIRE 192 112 64 112 WIRE 384 112 352 112 WIRE 416 144 416 128 WIRE 416 144 384 144 WIRE 432 144 416 144 WIRE 128 160 128 -48 WIRE 432 160 432 144 WIRE 64 176 64 112 WIRE 96 176 64 176 WIRE -128 192 -128 80 WIRE 64 192 -128 192 WIRE 192 192 192 112 WIRE 192 192 160 192 WIRE 224 192 192 192 WIRE 368 192 224 192 WIRE 48 208 48 -48 WIRE 64 208 64 192 WIRE 96 208 64 208 WIRE 0 224 0 160 WIRE 0 224 -96 224 WIRE 128 240 128 224 WIRE 496 256 496 48 WIRE 496 256 416 256 WIRE 368 272 368 192 WIRE 384 272 368 272 WIRE 224 288 224 272 WIRE 256 288 256 80 WIRE 256 288 224 288 WIRE 512 288 448 288 WIRE 672 288 672 96 WIRE 672 288 656 288 WIRE -272 304 -272 176 WIRE -128 304 -128 256 WIRE -128 304 -272 304 WIRE -48 304 -128 304 WIRE 0 304 -48 304 WIRE 48 304 48 288 WIRE 96 304 48 304 WIRE 352 304 352 112 WIRE 352 304 304 304 WIRE 384 304 352 304 WIRE 48 320 48 304 WIRE -48 336 -48 304 WIRE 416 352 416 320 WIRE 0 400 0 304 WIRE 48 400 0 400 WIRE 224 400 224 368 WIRE 224 400 48 400 WIRE 96 448 96 304 WIRE 304 448 304 304 WIRE 304 448 96 448 FLAG 128 240 0 FLAG -48 336 0 FLAG 416 352 0 FLAG 432 160 0 SYMBOL Opamps\\LT1013 128 128 R0 SYMATTR InstName U1 SYMBOL Opamps\\LT1013 416 32 R0 WINDOW 3 7 -29 Left 0 SYMATTR InstName U2 SYMBOL Opamps\\LT1013 416 224 R0 WINDOW 3 -3 164 Left 0 SYMATTR InstName U3 SYMBOL References\\LT1009 -128 224 R0 SYMATTR InstName U4 SYMBOL res -144 -64 R0 SYMATTR InstName R1 SYMATTR Value 50k SYMBOL res -16 64 R0 SYMATTR InstName R2 SYMATTR Value 16k SYMBOL res -16 208 R0 WINDOW 0 -25 72 Left 0 WINDOW 3 -19 32 Left 0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res 208 176 R0 SYMATTR InstName R4 SYMATTR Value 1k SYMBOL res 208 272 R0 SYMATTR InstName R5 SYMATTR Value 7k SYMBOL res 32 304 R0 SYMATTR InstName R6 SYMATTR Value 1k SYMBOL res 32 192 R0 SYMATTR InstName R7 SYMATTR Value 9k SYMBOL LED 672 80 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 72 32 VTop 0 SYMATTR InstName D1 SYMBOL LED 656 272 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 72 32 VTop 0 SYMATTR InstName D2 SYMBOL res 624 80 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R8 SYMATTR Value 220 SYMBOL res 608 272 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R9 SYMATTR Value 220 SYMBOL voltage -272 80 R0 WINDOW 3 -334 288 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value PWL(0 10 1 12 2 15 3 11 4 9 5 11 6 12 7 10 8 9 9 8) TEXT -224 440 Left 0 !.tran 0 10 0 1m uic TEXT 112 -88 Left 0 ;planning on 1 relay (U3 R9 junction) using a PNP) as well as LEDs TEXT -48 -128 Left 0 ;as battery voltage drops, relay is closed. Relay coil off of seperate supply