I made myself an arduino board with an SD card reader. I noticed that when I have an SD card installed in the reader, it gets very hot, almost feels like it will burn your finger when you touch it. Normally when this happens, I've only initialized the SD card library and I'm not even actually reading any data from the card. Is it normal for them to get this hot? It made me wonder if there is a list of best practices to follow when implementing an SD card reader in a project.
Thanks!