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Convert a 5V Arduino Nano clone to run on 3.3V
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Pololu 3.3V Step-Up/Step-Down Voltage Regulator S7V8F3
Pololu 5V Step-Up Voltage Regulator NCP1402
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Taking It To Another Level: Making 3.3V Speak With 5V | Hackaday
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How to convert 5V Analog Sensor Output value to 3.3V Analog Value for NodeMCU – A blog about DIY solar and arduino projects
1.5v to 3.3v converter
Addicore Logic Level Converter - Bi-Directional 5V to 3.3V, I2C signal capable
![5p Mini Size without pin 5W DC-DC 5V-36V to 5 12V 24v Step-down Power Module [DD40AJSB*5] - USD $9.99 : canton-electronics.com](http://g02.a.alicdn.com/kf/HTB1tdXtKXXXXXXvXXXXq6xXFXXXL/221872405/HTB1tdXtKXXXXXXvXXXXq6xXFXXXL.jpg "5p Mini Size without pin 5W DC-DC 5V-36V to 5 12V 24v Step-down Power Module [DD40AJSB*5] - USD $9.99 : canton-electronics.com")
5p Mini Size without pin 5W DC-DC 5V-36V to 5 12V 24v Step-down Power Module [DD40AJSB*5] - USD $9.99 : canton-electronics.com
Logic Level Converter Only Half the Voltage on HV Side - General Electronics - Arduino Forum
![SOLVED] Wemos D1 mini - 5v and 3.3v pins - Microcontrollers - Arduino Forum](https://aws1.discourse-cdn.com/arduino/optimized/4X/f/e/3/fe3be631ead8e4f48822dc36435aef44caa9c491_2_690x388.jpeg "SOLVED] Wemos D1 mini - 5v and 3.3v pins - Microcontrollers - Arduino Forum")