Hasel muscle is used in soft-robotics for movement of robot elements.
nail polish or glue
high voltage power supply
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Step 1: Preparation of String Bags
Cut a small square at the bottom of the string bag.
Step 2: Fill String Bag
Fill the uncut string bag with glycerine to half its volume.
Step 3: Tie the Cord
Tie and then thread the string through the square cut at the beginning.
Step 4: Pack String Bag Inside String Bag
Pack one string bag into another to fill the free space exactly.
Step 5: Thread the String Through
Thread one string through the slot of the string bag so that one string is next to where the other string is tied.
Step 6: Position of the Electrodes
Glue carbon dust from both sides of the bag onto glue or nail polish.
Step 7: Finish
The last stage is to apply a high voltage to the electrodes, the pressure will be exerted under the influence of attracting electrodes on the bag, then it will stretch by pulling the string.