The 47221 is a high-quality, low-cost switching power supply module designed and manufactured by Myrra. It is a single-output, adjustable voltage power supply with a wide operating range of 0 to 32V and a maximum output current of 4A. Its short-circuit protection, over-temperature protection, and overload protection ensure reliable and safe operation. It is equipped with an easy-to-read LCD display that shows the current output voltage, output current, and power, making it an ideal choice for applications where precise voltage and current control is required. The 47221 is a highly versatile switching power supply and is suitable for use with different types of electronic devices, such as microprocessors, motor controllers, and telecommunication systems.