This lecture provides a recap on selecting the sampling time in digital control systems, emphasizing the trade-offs between processing speed and avoiding quantization errors. The instructor explains the importance of finding the right balance to achieve optimal control performance and highlights the advantages of digital control systems over analog systems in terms of flexibility and cost-effectiveness. Additionally, the lecture covers the benefits of using microprocessors for implementing various control algorithms and performing system checks, ultimately concluding with the significance of considering sampling time and the effects of discretization and quantization to maximize the benefits of digital control.