This lecture explores the use of ultrasound for neuromodulation, focusing on the development of miniaturized biomedical devices for brain stimulation. Topics include the advantages of ultrasound, challenges in targeting accuracy, and the potential for non-invasive stimulation modalities. The presentation covers the mechanisms, parameters, and applications of ultrasound neuromodulation, highlighting the advancements in brain stimulation technology. Additionally, it discusses the integration of transparent electrodes for optogenetics and the development of biodegradable devices for biomedical applications.