I plan to use the freqmeasure library to count how often a reed switch pulses. The circuit would be pin 13 I think it is on a Micro to the reed switch then to ground. Is a resistor required to limit the current or is it limited internally by the Arduino when used this way?
Before anyone asks why I don't use a hall effect sensor etc, this reed switch is a standard BMW part in the rear differential used to measure speed. I'm curious to find out if I have any debouncing issues with it. My hope is that there is some sort of debouncing built in to the unit or it is some sort of very high quality switch.