An electronics expert, also known as a TECHIE, is someone who is highly knowledgeable in the field of electronics. They are experts in the design, development, and maintenance of electronic systems and components. They have a deep understanding of the principles of electricity, electronics, and electromagnetism. They are also well-versed in the use of various tools and techniques used in the field of electronics. They are often employed in the research and development of new technologies and products.