I've used a simple RED LED in cases like this. It will reduce 5V to something a 3.3V chip will be happy with. I also use a 680 ohm resistor to ensure the LED lights up. That way I get my pilot light (power on) too.
I've used a simple RED LED in cases like this. It will reduce 5V to something a 3.3V chip will be happy with. I also use a 680 ohm resistor to ensure the LED lights up. That way I get my pilot light (power on) too.