| 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 |
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