Although we are very pleased with what we have achieved in this project, there are still some improvements that we feel can be done, and a few pointers that may suggest how this project may progress:

Control

1. •Although our current prototype of the PCB EMG is relatively small, we aim to slim this down to something is perhaps similar to the iLimb’s sensor modules. This would greatly decrease the bulkiness of the bionic hand
   

2. •To reduce waste, we can either continue to research ways to effectively implement dry electrodes, or design a reusable electrode. For example the tin can electrodes, but with a cavity for electrode gel placement, and ways to hygienically clean these.
   

3. •A second, or maybe even third EMG can be used to measure another muscle, providing more ways of controlling the bionic hand. For example, the independent measurement of the extensor and flexor muscles of the forearm.
   

Sensory Feedback System

1. •With the new 2nd prototype feedback circuit, motors are switched on or off. We aim to implement pulse width modulation (pwm), so that the power of the vibration may correspond to the force applied to the sensors.
   

2. •We aim to incorporate more sensors and feedback units onto the vibrating hand. It may be possible to create a relief of the object being touched using a large array of sensors.
   

3. •Resistive sensors can be used to measure the stretching between the points of the bionic hand, which may add another dimension to the sensory feedback system.
   

Bionic Hand

1. •We aim to add more digits to the current claw, and perhaps eventually providing it with articulated fingers that resembles that of a human’s.
   

2. •However, for this to happen, we must step out of using LEGO for manufacturing, and design a more robust and reliable bionic hand from scratch.
   

Armband

1. •The current prototype armband is rather clumsy looking and bulky, we aim to polish it by using more robust materials and smaller components
   

2. •The armband can be incorporated directly to the bionic hand, so amputee users can simply slot on the bionic hand, with all its components in place for use.
   

With your help, these realities can be realised. We welcome and actively encourage the credited use of our work and research. We hope that this would fuel progress for the development of more advanced yet sustainable prosthesis. Thank you.

Merchiston Senior Engineering Team