Invertion circuit

[sakishrist]

Hello,

What circuit could I use to make high to low and low to high? I just have a microcontroller and it blinks a led. I need a circuit to light the led when the microcontroller's pin is low and turn it off when the pin is high.

Thanks

 

[colin55]

Place the cathode of the LED on the output of the micro and the other end on the 5v rail via a resistor.

 

[sakishrist]

Thanks ...