LED technology has been a major breakthrough for our modern society. Among its virtues we find energy savings compared with incandescent and fluorescent lighting technologies, and the creation of a new information channel signalling with LED screens. LED displays have enabled way to dynamically inform people in almost any scenario and from a great distance. In the last 25 years an industry specialized in manufacturing LED screens has been developed. One of these specialized companies, MP Electronics, intends to develop a new product consisting of a LED screen to display the time and date. In addition,the product will have the option to work as a chronometer or stopwatch, controlled through an infrared remote control. This product is intended for places such as offices, receptions or even universities where the stopwatch function is very useful for lectures or examinations. The goal of this TFC is the designing of the product's prototype both at the hardware as well as the software level. This process will include the device initial concept, electronic components selection, electrical circuit and printed circuit board design, C language microcontroller programming and finally the assessment of the design in view of optimizing it for industrial production. For the device development we will work with a microcontroller, which will deal with the management of all the other components; an integrated RTCC (Real Time Clock Calendar) with SPI communication in order to obtain one of the main requirements, the minimum time deviation in the long-term; a circuit for infrared communication, with witch the user can access all the device functionality; and finally the entire electronics designed to display information with the matrix LED display. Being a project developed for industry, it is essential to develop the best product taking into account two important factors: time and cost.