Complete the schematic on the back by drawing

the appropriate connecting wires. Use the I$/$O

assignments shown in the table at the bottom of

this page.

Note: Don$$t confuse the switch S$1$ with the

$74-283$ output S$1.$ Yes, it$$s the same sym

bol. It should be clear from context what

is being referred to each time you see S$1,$

S$2,$ S$3,$ or S$4$