Learn how to design and build a simple dual power supply for synthesizer modules in this comprehensive tutorial video. Explore the differences between DC and AC adapters, understand voltage and ground concepts, and delve into rectification processes. Discover practical techniques for identifying ground wires, implementing rectification, and utilizing filter capacitors. Gain insights into ripple reduction, voltage regulation, and high-frequency noise mitigation. Master the implementation of regulator protection and negative rail design. Note that this project is not suitable for beginners, and proper safety precautions should be observed when working with electronics.