In terms of material, you need:
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an Arduino board (you can find one here, for ~€20)
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myoelectric sensors (you can find some here, for ~€10)
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a shield for the myoelectric sensors (you can find one here, for ~€20)
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5 servomotors (you can find some here, for ~€20)
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a shield to provide power for the motors (you can find one here, for ~€4)
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fishing line, to create the articulations of the fingers (you can find some here, for ~€2)
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List of materials
We used the arm of an open-source project, InMoov. The instructions are given on this page. You can find the files for the different 3D parts in the section "Download 3D parts".
Mechanical parts
Note: if you don't have a 3D printer,
we provide a list of french Fablabs, where you can print the different parts if you bring them the files on a USB key.
Sensors
In order to make the hand work, you need to place the reference electrode (marked "D") on your biceps, the right electrode (marked "R") if possible on the flexor or extensor muscle of your forearm and the left electrode (marked "L") if possible on the muscle opposed to the one chosed for the right electrode, like shown on the picture below.