The textbook is designed for a one-semester course on electronics for physics students. In the first part on digital components, it covers, after an introduction to digital electronics, the fundamentals of combinational logic and its implementation in combinational logic devices, followed by sequential-logic devices such as flip-flops and memory components. The second part on analog components deals with the fundamentals of signal processing, filters and components such as diodes, transistors, and operational amplifiers. Each chapter ends with problem sets so that the students can check their understanding of the fundamentals and lab projects that have been proven to work well for instruction. The final section of each chapter is titled Practicum Test. It gives questions on simple aspects of the lab that students should know, for instance, on powering components and diagnosing signals with the oscilloscope. The new edition of this textbook adds more worked examples, exercises and end-of-chapter problems and provides more troubleshooting tips to help students find out why a particular circuit does not work. In addition, it features Arduino boards which have become widespread in the community as inexpensive, easy-to-use electronics platforms.