Version 4
SHEET 1 880 704
WIRE -208 256 -208 176
WIRE -208 368 -208 336
WIRE -48 272 -48 224
WIRE -48 368 -48 320
WIRE -48 464 -48 416
WIRE -48 560 -48 512
WIRE -48 656 -48 608
WIRE -32 176 -208 176
WIRE -32 272 -48 272
WIRE -32 368 -48 368
WIRE -32 464 -48 464
WIRE -32 560 -48 560
WIRE -32 656 -48 656
WIRE 64 176 48 176
WIRE 64 224 -48 224
WIRE 64 224 64 176
WIRE 64 272 48 272
WIRE 64 320 -48 320
WIRE 64 320 64 272
WIRE 64 368 48 368
WIRE 64 416 -48 416
WIRE 64 416 64 368
WIRE 64 464 48 464
WIRE 64 512 -48 512
WIRE 64 512 64 464
WIRE 64 560 48 560
WIRE 64 608 -48 608
WIRE 64 608 64 560
WIRE 64 656 48 656
WIRE 64 672 64 656
WIRE 336 368 224 368
WIRE 336 400 336 368
WIRE 336 512 336 480
FLAG 64 672 0
FLAG -208 368 0
FLAG 336 512 0
FLAG 336 368 out
FLAG -208 176 in
SYMBOL res -48 192 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -48 288 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res -48 384 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res -48 480 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL res -48 576 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res -48 672 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R6
SYMATTR Value 1k
SYMBOL voltage -208 240 R0
SYMATTR InstName V1
SYMATTR Value 6V
SYMBOL res 320 384 R0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL sw_5_to_1 160 320 R0
SYMATTR Value sel=3
SYMATTR InstName U1
TEXT -216 56 Left 0 !.OP