I have read this previous topic and found it incredibly useful:
I just have a few further questions if anyone could further answer them!
The current needed for his 10 RGB LED project only need 600mA, for 50+ RGB LEDs I would need 3A minimum. I can't find a power supply that is 7.5V and 3A. For more RGB LEDs will I need more voltage too?
Also, I believe that whatever power supply I do need, I plug directly into the Arduino then use the Vin pin to supply the LEDs. Is this correct? Are there dangers to doing this? Is there a better, safer option?
Basically is there anything I should know about expanding his project from 10 RGB LEDs to 50+ LEDs? If I expand this project from 50 to 100 LEDs, will I need to completely rewire and change the resistors and increase the voltage/current?
Thanks for anyone that is able to help! I'm quite new at this and I decided I want to attempt to build an LED strip from scratch in order to learn more about circuitry rather than just buying a pre-made strip.