Title: "Thyristors: Exploring Electronics"

Cover Description:
The cover shows Carlos, the main character, standing confidently in front of a blackboard. You have in your hands a diagram showing the symbols for DIAC, TRIAC and SCR. Behind him, there are silhouettes of students listening attentively, with speech bubbles indicating interest and curiosity. The background shows circuit diagrams and electronic components, emphasizing the theme of electronics education.

Caption: "Thyristors: Exploring Electronics"