Multiplexing with Arduino and the 74HC595

Step 6: Clamp Socket

Use a bench vice to clamp 16 pin socket on ribbon cable.  If you do not have a bench vice do not use pliers do this, you will clamp the socket on sideways and mess up the connections.  You're better off using a hammer to tap the clamp shut, just make sure you are always applying pressure evenly across the socket.

Be sure the clamp the socket on the ribbon cable in the same orientation indicated in the images above.