Review on Anmbest 10 Pack AMS1117-3.3 Voltage Regulator: Efficient Step Down Power Supply Module for 4.75V-12V to 3.3V Conversion - 800mA Buck Converter by Alejandro Labustin

These small power converters are ideal for modern microcontroller projects that require both 5V and 3.3V My designs use USB power supplies which provide 5 volts to my PCBs. I power 5V devices directly from this source and use these little converters to give me 3.3V power for newer microcontrollers and other 3.3V logic parts. The converters are rated at 800 mA, which is sufficient for these purposes. Buck converters are very efficient and consume very little power. These converters are small and easy to mount on a breadboard or PCB using pin headers, or solder directly to the board. My only complaint is that all 10 small boards are connected together and it's a bit difficult to separate them cleanly. But with a little care, this can be done. The manufacturer says they do this to protect the boards in transit and I can see this to be true.