Is it safe to use 5V and 12V with common ground? (very beginner) - General Electronics - Arduino Forum
![Is it safe to use 5V and 12V with common ground? (very beginner) - General Electronics - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/f/5/4/f54066e3d207629fff8c06899183f9cbd283d1d3.png)
Hi all, this is my first post here, and my second day with Arduino and with electronics, so I'm really a beginner, also not a native english speaker (let me know if something doesn't make any sense). I tried to do my best to share my thoughts and ask the correct questions, but I'm sure I made some huge mistakes, please excuse me. This is my "Hello World" project, I have: An Arduino Due A biploar stepper motor from a DVD driver An Easy Driver stepper motor driver (v4.2) A TowerPro 9g micro se
![](https://europe1.discourse-cdn.com/arduino/original/4X/4/9/2/4921b461de8a9e9be039d6b17e691b77fc5a7e7f.png)
Safety of common grounds - General Electronics - Arduino Forum
![](https://europe1.discourse-cdn.com/arduino/optimized/4X/0/d/3/0d3ecd89f3f8b9eb0c6df449651054dd071b35d7_2_690x388.png)
Uno - Using 5v and 3.3v pins at the same time? - General Electronics - Arduino Forum
![](https://europe1.discourse-cdn.com/arduino/original/4X/7/a/7/7a7437b688331e78c4787c629f6f2eef1d66cac3.jpeg)
ground of Arduino and ground of power source - Project Guidance - Arduino Forum
![](https://europe1.discourse-cdn.com/arduino/original/4X/c/d/1/cd14d71b16f6c6b35a3486ffb8ab58f51401bf8f.png)
How to ground the external power supply - General Electronics - Arduino Forum
![](https://europe1.discourse-cdn.com/arduino/original/4X/3/a/7/3a76313c634853dd6e4dc3c602d6cda7940b1413.jpeg)
Convert 12V to 5V by using 7805 or using Resistor? - General Electronics - Arduino Forum
![](https://europe1.discourse-cdn.com/arduino/optimized/4X/8/c/a/8cac8613b0bda5342e311b4a61b33b2d56c770e6_2_666x500.jpeg)
12v / Common Ground - General Electronics - Arduino Forum
![](https://europe1.discourse-cdn.com/arduino/original/4X/2/c/8/2c8d6fc847e9a36f42eba989acf316d04e6f9c45.jpeg)
Another voltage divider question.. warning noobie! - General Electronics - Arduino Forum
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Common Ground between High Current Circuit and Sensitive Circuit - General Electronics - Arduino Forum
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Common Ground between High Current Circuit and Sensitive Circuit - General Electronics - Arduino Forum
![](https://europe1.discourse-cdn.com/arduino/optimized/4X/d/6/5/d65d293fb7265415be1e52a964923c765f419598_2_500x500.jpeg)
Should just Ground needs to be same or connected? - General Electronics - Arduino Forum
![](https://preview.redd.it/keep-killing-nanos-trying-to-make-an-led-project-permanent-v0-jsuxsahwpw0a1.jpg?width=1080&crop=smart&auto=webp&s=2cd2c5475eef5213767a2fd79bb875f4f8d676c8)
Keep killing nanos trying to make an LED project permanent, not sure what I'm doing wrong (info in comments) : r/arduino
![](https://i0.wp.com/randomnerdtutorials.com/wp-content/uploads/2016/11/Schematics.png?resize=700%2C466&quality=100&strip=all&ssl=1)
Guide for Relay Module with Arduino
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Powering Arduino Through 5V - General Electronics - Arduino Forum
![](https://cdn.sparkfun.com/assets/parts/1/0/4/00114-05.jpg)
SparkFun Breadboard Power Supply 5V/3.3V - PRT-00114 - SparkFun Electronics
![](https://electropeak.com/pub/media/catalog/product/cache/95f75205f3b943f313b30831421df8c2/a/r/ard-01-032-1-arduino-mega-2560-r3-clone-arduino-mega-2560-r3-clone.jpg)
Arduino Mega 2560 R3 (Clone) - ElectroPeak