I want to connect a 433MHz RF receiver running at 5V to an Arduino running at 3.3V, or do I have to build a resistor / diode clamp.Some (PIC) MCUs have 5V tolerant input pins but I'm new to AVR & Arduino's.Bonus question, are any inputs better suited to capture? e.g. IR or PWM (on PIC it's called a Capture Compare module). I suppose INT inputs would do in a pinch.
Thank you. I guess the choice is a 100ohm resistor & Schottky diode clamp to 3.3V or a 3.3V 433/315 MHz module.