In this presentation, we will explore the operation of data diodes, their fundamental characteristics, and through a practical example, examine the functioning of a DIY data diode using optical converters. We'll delve into how these devices, designed to allow data transmission in only one direction, enhance security in sensitive information environments. By understanding the principles behind data diodes and witnessing a hands-on example of constructing one, attendees will gain valuable insights into their potential applications and how they can be integrated into broader cybersecurity strategies.