Hi,
I have project to control LED strip WS2812E with remote system (NRF24L01) betwen 2 Arduino.
i'm not shure about how to wiring my led strip. I have a power bank Ni-Mh 7.2v convert to 5v for the strip led. But i'm not shure how to connect GND betwen strip led/arduino/LM2596
After few reserch i have understank led strip need more power than arduino 5v pin can give me, that is the reason i use LM2596 to give 3A for the led stip.
In my opinion it's not correct to make a mix on strip led between 5v from LM2596 and PVM from my arduino (there do not have same power source/gnd) ?
thanks,
1 Like
Welcome to the forum
Your circuit looks OK to me.
You should consider powering the Nano from the LM2596 using the 5V pin on the Nano. This would avoid the Nano wasting power by having to drop the voltage from 7.2V to 5V through its linear regulator
Nice diagram, it shows everything. I only see one minor problem the grounds need to be connected. Many but not all buck converters pass the ground through. With the added ground I see no reason it will not work. For the future consider a SEPIC converter it will still give you 5V when the input goes below the minimum required by the buck converter. Also if the LED is more than a meter or two you will need to add additional power leads to it.
it would be more simple to take a 5v power bank
It is recommended, but optional, to put a 100uF to 1000uF cap across the power to the strip to absorb fluctuations in current and to put a 220Ω to 470Ω resistor in series between the Arduino output pin and the Din of the strip to protect the pin from accidental over current.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.