Why the fuck does a freaking SD card reader for arduino needs a 3v and a 5v pin...... I have no space in my project and no experience at all to handle this.... and no fucking place for batteries....

Why is every of my project like this ..... cry

Just should find a bigger microcontroller that I don't need an sd card xD have to save some pictures for an 128x64 rgb display that is energysaving cause it should be a necklace

It's way to big for my necklace

@Kanimaru What parts are you using?

@Kanimaru that's per picture:
128×64×3 = 24'576 bytes (1 byte per color)
or exactly 192 kBits per picture

I guess you would want at least 1Mbit.
These are only for SPI interface, which Arduino has, but corrently not in the language (as stated on the info about Arduino Nano), but it should be possible to get it working, if you write the code in C. 😉

Here are some ICs:
https://digikey.com/products/de/...

Ssd1331 display some random sd card module and currently atmega328

@PonySlaystation need to see how to use them, I'm just a developer I have not much electronic knowledge. The programming part should maybe not the problem

@Kanimaru So you need a 5v power source and a 3v source? Why not set a pin to high and use a resistor to lower it? It might be janky but it would probably work. Also check if the sd card module can run with the 5v by itself (the instructions aren't always very clear).

@JohnScott I'd rather use a regulator than a resistor.

@electrineer Well you're not wrong, but I did specify that it wouldn't be optimal.

@Kanimaru @electrineer @Condor I recommend this module it's worked for me in the past with no extra parts.

@JohnScott looks useful where to buy?

@Kanimaru Ebay. They're dirt cheap so I bought 5 of them. 👍