How to stop 555 IC from heating up? | Electronics Forum (Circuits, …
Dec 05, 2017 · Dec 05, 2017 · Yes: stop abusing the 555 . It's maximum rated current from pin 3 is 200mA, so with a 9V supply the load it can safely drive should be about 40Ω or more. The transformer winding resistance is obviously much less than that! I second the post #2 suggestion to use a transistor.
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