This book is Intended for the undergraduate laboratory of "Basic Electronic Devices" course, customarily the first course Taken by Electronics and Telecommunications Engineers Aspiring. Normally found at courses tissue has the second-year college level, although they CAN Also Be Offered as early as the second Semester of the first year as part of a two-Semester sequence. The Laboratory Investigations in this manual is designed to proved the Theoretical Principles set out in the books mentioned in references from the Beginning of Each Laboratory. A total of 21 laboratory Investigations is Offered, involving the construction / testing of the circuits discussed in textbooks and raising the main Characteristics of electronic devices used. Each Investigation CAN BE Normally completed a two-hour Within Period. All the Basic Theoretical Concepts, Necessary circuits and connection diagrams is provided in the manual so Investigations That CAN Also Be Performed without the textbooks. Each laboratory work ends with a set of questions and answers, Necessary for sedimentation of Knowledge Acquired during laboratory work and, last but not least, in order to prepare students for lab evaluation and course final exams.