Why is my power supply over-herating? Answered
I have a very simple power supply build to power effect pedals
220VAC --> regular 12vDC wall wart rated at 1A --> 9vDC (7809) regulator with 220uF on the in and 1uF on the out -->1 load rated at 250 mA
It's perfect except one thing... it over heats quickly, which will eventually lead to damage in a way or another.