Precautions for Transformerless Switching Power Supplies
This transformerless power supply has the highest output voltage at no load.
This power supply is only suitable for occasions that do not require high voltage stability. In the case of large load changes, a voltage regulator circuit can be designed at its output.
Since this transformerless power supply is directly connected to the mains without isolation, it is necessary to pay attention to safety to prevent electric shock. The power supply circuit is simple and easy to manufacture. As long as the components are properly selected, it can work after soldering.
