LED's connected to a 9V AC/DC transformer and something went terribly wrong
I recently did a project with 4 LED's 3.3V 25mA 2 in each series (2 parallel circuits). I know i wasn't drawing too much from the transformer but my transformer still melted(ish). It was connected to a switch, but i may i had it connected wrong. I searched for shorts first, and couldnt find any. Would this happen becuase i connected the switch incorrectly? I cannot find much information on using AC/DC transformers for LED's....I was looking to save money on batteries for my projects.