njit2.mrooms.net Indicate the steps to identify if a key was pressed in a 4 x 4 keyboard. When a low column is found, we get the key code from the Step 1) Drag answer here look-up table. Ground one row at a time. Read the columns. If all columns are Step 2) Drag answer here high ground Step 3)Drag answer here the next row. Ground all rows. If all columns are high go to step 1