Version 4
Full adder
SHEET 1 880 680
WIRE -176 -64 -176 -96
WIRE 160 -64 160 -96
WIRE 96 -48 64 -48
WIRE 128 -48 96 -48
WIRE 368 -48 368 -80
WIRE 336 -32 224 -32
WIRE 128 -16 64 -16
WIRE 816 -16 432 -16
WIRE 64 0 64 -16
WIRE 64 0 48 0
WIRE 336 0 272 0
WIRE 160 32 160 0
WIRE 368 32 368 16
WIRE 304 80 304 64
WIRE -176 96 -176 80
WIRE 272 96 272 0
WIRE 272 96 16 96
WIRE 288 96 272 96
WIRE 400 112 352 112
WIRE 224 128 224 -32
WIRE 288 128 224 128
WIRE 464 144 464 112
WIRE 304 160 304 144
WIRE 400 160 400 112
WIRE 448 160 400 160
WIRE 656 176 528 176
WIRE 448 192 400 192
WIRE 656 192 656 176
WIRE 816 192 816 -16
WIRE 464 224 464 208
WIRE -176 240 -176 224
WIRE 96 256 96 -48
WIRE 288 256 96 256
WIRE 400 272 400 192
WIRE 400 272 352 272
WIRE 64 288 64 0
WIRE 288 288 64 288
WIRE 304 320 304 304
WIRE 656 336 656 272
WIRE 816 336 816 272
WIRE -176 400 -176 384
WIRE 656 448 656 400
WIRE 816 448 816 400
FLAG 160 32 0
FLAG 368 32 0
FLAG 464 224 0
FLAG 304 320 0
FLAG 304 160 0
FLAG 656 448 0
FLAG 816 448 0
FLAG -176 -96 VDD
FLAG 160 -96 VDD
FLAG 368 -80 VDD
FLAG 304 64 VDD
FLAG 464 112 VDD
FLAG -176 80 A
FLAG 64 -48 A
FLAG -176 224 B
FLAG 48 0 B
FLAG -176 384 C
FLAG 16 96 C
FLAG -176 16 0
FLAG -176 176 0
FLAG -176 320 0
FLAG -176 480 0
FLAG 304 240 VDD
SYMBOL Digital\\and 320 208 R0
SYMATTR InstName A1
SYMBOL Digital\\or 480 112 R0
SYMATTR InstName A2
SYMBOL Digital\\xor 384 -80 R0
SYMATTR InstName A3
SYMBOL Digital\\and 320 48 R0
SYMATTR InstName A4
SYMBOL Digital\\xor 176 -96 R0
SYMATTR InstName A5
SYMBOL res 800 176 R0
SYMATTR InstName R1
SYMBOL res 640 176 R0
SYMATTR InstName R2
SYMBOL LED 640 336 R0
SYMATTR InstName D1
SYMBOL LED 800 336 R0
SYMATTR InstName D2
SYMBOL voltage -176 -80 R0
SYMATTR InstName V1
SYMBOL voltage -176 80 R0
SYMATTR InstName V2
SYMBOL voltage -176 224 R0
SYMATTR InstName V3
SYMBOL voltage -176 384 R0
SYMATTR InstName V4