LED interface on I/O ports

Connect LED to I/O port with 220k resistor and 5V power supply. Connect cathode of LED to pin port and anode with resistor. You can still connect LED without resistor also but performance will not be good on those case becasue we are not limiting current to diode(LED). Below picture shows you clear observation of connection

About Jagadesh Boopathi

I am tech savy spending more time on technology, learning about web, making time to find new stuff always. Also I am Entrepreneur, Blogger and an Engineer. Open Source - Matters.

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