In SX Microcontrollers, SX/B Compiler and SX-Key Tool, smhhadima wrote:

My SX Key makes the 7805 regulator very very hot!
the thing is it never burnt my 7805 or the the SX_key went bad!

I checked the voltage and it is 5V

I changed the 7805 but the same !

I checked the to see the current and it was something very small like 50mA

 

Why  does it get HOT???

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