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Amazon.com: 500Ma DC-DC Boost Converter Board Voltage Step-Up Module 3.3V, No Pins; 3.3V, for Aa, Aaa Battery-Powered Devices, Breadboard, Small Power Motor, Cameras, Electric Toys(3.3V 无针) : Electronics
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5V to 3.3V logic level translation/conversion/shifting: how to interface a 5V output to a 3.3V input. – next-hack.com
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USB to TTL Converter USB to UART Module 5V/3.3V/1.8V FT232RL Code Programmer Downloader - USB to TTL Module - Arduino, Robotics, Raspberry Pi, ESP8266, Learning DIY, Development board ICStation
![5V to 3.3V logic level translation/conversion/shifting: how to interface a 5V output to a 3.3V input. – next-hack.com 5V to 3.3V logic level translation/conversion/shifting: how to interface a 5V output to a 3.3V input. – next-hack.com](https://next-hack.com/wp-content/uploads/2017/09/A5I0.png)