The main aim of this project is the design of a hand prosthesis on the basis of accessible technologies of fewer cost of manufacturing and implementation. This prosthesis is developed through 3D printing, an Arduino application and an Android application. All this is done with non-profit purposes but for personal and teaching use. The system working is based, firstly, on the collection of myoelectric signals in order to establish the movement of the prosthesis. After that, it is possible to communicate through a mobile phone using Arduino, which will interpret the sent and received commands. This will be done thanks to the communication through a socket between the mobile phone and the bluetooth module which communicates with Arduino though a serial port. The electromyogram is a test used to study the functioning of the nervous system which consists of registering through electrodes the electrical currents formed in nerves and muscles when contractions occur. The electromyogram registering equipment usually found in clinical surroundings is very expensive, so to solve this drawback it is proposed a model in which materials used are affordable and with a fewer cost. For the obtention of this signals, it is used an E-HEALTH board which consists of an electrical circuit that amplifies and filters the signal. After this, the Arduino mega 2560 board collects the signal though an integrated application in order to control the sense of rotation of each of the engines that comprise the prosthesis. It counts with a LCD screen, a gyroscope to make the hand movement and a bluetooth module to establish a wireless system of communication between the Arduino application and the Android application. This Android application obtains a monitoring of the electric pulse got from muscles for the proper calibration and the proper positioning of the sensors. Movement can also be endowed in the prosthesis engines.