Check out my process to make this massive 38" farmhouse style clock from pallet wood.
Step 1: Begin Frame Construction
Using 4 one by 6 boards (desired size) joint the corners with pocket holes and wood glue.
Step 2: Plane or Sand All Reclaimed Boards
Run each of your pallet boards through the planer. If you do not have a planer, you can achieve the same effect by sanding the boards ( it just takes longer)
Step 3: Attatch Thin Plywood
Attach thin plywood to frame using wood glue and pin nails. This will give you the structure to attach the reclaimed boards to .
Step 4: Attatch Pallet Boards
Attatch pallet boards in desired pattern.
Step 5: Apply Finish
Apply desired finish. In this case i chose the distressed look. Dark stain with white paint on top.
Step 6: Attatch Numbers
Attatch your numbers or markers. You can buy kits, but in this case i made my own.
Step 7: Attatch Clock Mechanism
Attatch the clock parts that come in the kit. Hang in the desired location and you're all set!