SOLVED] Wemos D1 mini - 5v and 3.3v pins - Microcontrollers - Arduino Forum
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![SOLVED] Wemos D1 mini - 5v and 3.3v pins - Microcontrollers - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/f/e/3/fe3be631ead8e4f48822dc36435aef44caa9c491_2_690x388.jpeg)
Hallo Arduino people, Forgive my ignorance, I'm a software developer and don't know much about electronics (yet). I hope you can help me, I've search the internet long enough already without finding answers. The Wemos D1 mini has both 5v and 3.3v pins. I know I can power it via the 5v pin, which is practically the same as powering it via USB. Question 1: Is this pin INput only? I've also noticed a 3.3v pin, in some diagrams also used to connect logic level shifter. Question 2: What's this
![Wemos D1 mini 3.3V out to 5V out without level shifter - General Electronics - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/b/2/4/b245c3827d08dd4ade8ced9294288d9ef0b870e2_2_690x408.jpeg)
Wemos D1 mini 3.3V out to 5V out without level shifter - General Electronics - Arduino Forum
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New Wemos board - Open AirGradient
![WEmos minipro run from 3.3V - Microcontrollers - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/c/1/9/c19b830193c4d59bd33a72f8f3c02690240651af.jpeg)
WEmos minipro run from 3.3V - Microcontrollers - Arduino Forum
![Please help: Code that works on UNO doesn't work on esp8266 on the D1 Mini. Pin order fix didn't help. : r/FastLED](https://i.redd.it/please-help-code-that-works-on-uno-doesnt-work-on-esp8266-v0-h62m4pvyusz91.jpg?width=5120&format=pjpg&auto=webp&s=d73e9b6b42a0abe7a79c5bcee9a3d846e1666923)
Please help: Code that works on UNO doesn't work on esp8266 on the D1 Mini. Pin order fix didn't help. : r/FastLED
![Wemos D1 Mini - Send email, interact with Arduino - Project Guidance - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/8/4/c/84c07b9c95d2a6e7bc84eb79f58e2891d05a785f_2_690x388.jpeg)
Wemos D1 Mini - Send email, interact with Arduino - Project Guidance - Arduino Forum
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Seeeduino LoRaWAN 3.3 V - compatible with Arduino* Botland - Robotic Shop
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CAN FD Shield for Arduino, 9-Pin Sub-D, SPI, Selectable OBD-II/CAN Pinouts - RobotShop
What different between these 2 relay modules
![Wemos D1 mini 3.3V out to 5V out without level shifter - General Electronics - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/b/6/b/b6ba74ffcb773ffbd3d16905132a7214e8718a9a.jpeg)
Wemos D1 mini 3.3V out to 5V out without level shifter - General Electronics - Arduino Forum