/* Some insight on the project */ Hi, I am trying to power around (give or take) 150 ws2812 LEDs with an arduino uno wired close together in a matrix (depending on how i am powering this, idk if it'll be easier to do serpentine raster wiring or not). I need a portable power supply since I want to carry this display with color changing animations and scrolling text at festivals.
Now, I don't know how I am to power this. It definitely wouldn't go over 6 amps (max) and would probably power it with even less (about 3.6). I wanted to grab a couple power banks (like your typical usb portable cell phone charger you can find on amazon) that give out a couple thousand mAh at 1-2amps but I wouldn't be able to use them all on the one arduino uno board since it only has one usb slot (only there was a way to get around this without buying multiple arduinos)
I have also looked at the 6 x AA and 4x AA battery holders on adafruit. If I did the 6 x AA battery holder, is this 100% safe since it says with rechargeable batteries it outputs 7.5V but says it's okay electronics with a voltage regulator (google says arduino's 5v pin outputs a regulated 5V from the regulator on the board) The 6 x AA battery holder comes with a pin so how would I use like 3 of these to my leds?
The 4 x AA battery holder says it has 4.8V DC for rechargeables (5.2V when fully charged, 4.4V when discharged) so this would work on the arduino uno's 5v pin? I just don't know how to wire more than one battery holder to these led's if this would be the way to go. If anyone is able to do a rough schematic that would be awesome!!
If either of the battery holders work and I ended up wiring like 3 of them to power a couple rows at a time; would I need to power the leds separately than the arduino? How would the schematic look for that?
Please let me know if you need me to expand on anything else but that sums it up as best as I could. Thanks