69 Copyright © 2015, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 4 DOI: 10.4018/978-1-4666-8490-4.ch004 ABSTRACT Considering the possibility that from the area of electronics can be provided feasible solutions in the feld of non-destructive testing, this chapter present a prototype and methodology that allows energize an ultrasound transducer. This system is used to evaluate for detecting weld failures at the junctions of metallic parts. Subsequently, in order to validate the design quality of that source, a computer system that allows control of a card developed ultrasound. Finally, it is implemented the ultrasonic imaging by time of fight difraction technique, in order to obtain an objective comparison methodology to both systems. INTRODUCTION Ultrasonic methods of non-destructive testing have been widely used in welding inspection; however, varied defectology, search and interpretation, is often highly dependent on subjective factors such as visual fatigue, mood and physical fatigue of the evaluator, which affects the quality of the inspection (Polikar, Upda & Taylos, 1998). Now; venture into the field of non-destructive testing, or ultrasound, involves having access to appropri- ate instrumentation and often expensive, so that its development has leaded to the realization of projects with the participation of students and teachers interesting challenges. In that vein, it was designed and built an essential component in ultrasonic instrumentation; that is, the excitation system (also called button). The purpose: to design and build an ultrasonic system that allows the capture of acoustic information from welded joints to identify any discontinuities present in them. With the capture of echoes generated by any defects, develop and implement algorithms for the ultrasonic imaging and diagnosing faults that threaten the integrity in industrial components such as welded joints. The development of ultrasound Development of a System for Detecting Weld Failures Jairo Alejandro Rodríguez Universidad Santo Tomás, Colombia Edwin F. Forero Universidad Santo Tomás, Colombia