A 5V regulated power supply circuit with expansion and overvoltage protection features is illustrated below. This design employs a three-terminal regulator 7805 (capable of handling up to 1.5A of maximum current) combined with a high-power transistor to significantly boost the output current capacity to approximately 2.5A. Additionally, a 5.6V voltage regulator, diode VD3, resistor R3, and a thyristor VS work together to create an overvoltage protection mechanism. In the event that the output voltage exceeds 5.6V (the threshold set by the voltage regulator VD3), VD3 activates, triggering the thyristor VS. This triggers a rapid blowout of the FU fuse, thereby protecting the connected load. This versatile power supply serves well as an experimental power source for various electronic projects. As depicted in the diagram, this power supply not only provides a stable 5V output but also incorporates expansion capabilities and robust overvoltage protection. The use of the 7805 regulator ensures reliable performance even under heavy loads. Furthermore, the inclusion of a 5.6V zener diode and a thyristor-based circuitry allows for seamless fault protection, safeguarding sensitive equipment from potential damage due to unexpected voltage spikes. This setup is ideal for hobbyists and professionals alike who require a dependable power supply solution for their experiments or projects. With its combination of simplicity and safety features, this circuit stands out as a practical choice for many applications. This power supply is particularly useful for those working on microcontroller-based projects, LED lighting setups, or any application requiring a stable and safe power source. Its ability to handle currents up to 2.5A makes it suitable for driving multiple components simultaneously without compromising on stability. Whether you're prototyping new designs or testing existing circuits, this power supply offers peace of mind with its built-in safeguards against overvoltage conditions. In conclusion, the combination of the 7805 regulator, along with the additional protective elements like the zener diode and thyristor, creates a highly functional and user-friendly power supply system. Its ease of use, coupled with its reliability, makes it a valuable asset in both educational settings and professional environments. If you're looking for a cost-effective yet effective power supply solution, this design fits the bill perfectly. splicing screen, large display,large lcd display, LCD screen Shenzhen Risingstar Outdoor High Light LCD Co., Ltd , https://www.risingstarlcd.com