People love Wolverine and his claws. But one inventor took Wolverine's claws to the next level by adding muscle sensors. The team behind the Myoware muscle sensor put together a tutorial for how to use a 3-D printer to make a pair of Wolverine claws that would respond to a flexing muscle. However, these claws require designers to install a fourth generation Myoware sensor in order to work.

Make Magazine has created a lengthy tutorial that explains how to make the claws.

Myoware is trying to raise $10,000 for the fourth generation of the Myowaresensor. According to its Kickstarter:

The MyoWare measures muscle activity through the electric potential of the muscle, commonly referred to as electromyography (or EMG for short). 

When your brain tells your muscle to flex, it sends an electrical signal to your muscle to start recruiting motor units (the bundles of muscle fibers that generate the force behind your muscles). 

The harder you flex, the more motor units are recruited to generate greater muscle force. The greater the number of motor units, the more the electrical activity of your muscle increases.

The MyoWare will analyze this electrical activity and output an analog signal that represents how hard the muscle is being flexed. 

Users can pre-order a fourth-generation chip for $35 through Myoware's Kickstarter campaign.